Toyota Avalon (XX50): Lin Communication System(for Gasoline Model)

Lost Communication with Power Source Control (B278C)

DESCRIPTION

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and power management control ECU stops for 10 seconds or more.

HINT:

The power management control ECU is built into the certification ECU (smart key ECU assembly).

CAUTION / NOTICE / HINT

NOTICE:

• Before replacing the certification ECU (smart key ECU assembly), refer to Registration.

  Click here

• When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

PROCEDURE

(a) Clear the DTCs.

NEXT

(a) Check for DTCs.

OK:

DTC B278C is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

P/W Master Switch Communication Stop (B1206,B1273,B2321-B2324)

DESCRIPTION

This DTC is stored when LIN communication between the main body ECU (multiplex network body ECU) and multiplex network master switch assembly, sliding roof ECU (sliding roof drive gear assembly)*, power window regulator motor assembly (driver door), power window regulator motor assembly (front passenger door), power window regulator motor assembly (rear RH door) or power window regulator motor assembly (rear LH door) stops for 10 seconds or more.

• *: w/ Sliding Roof System

• *: w/ Sliding Roof System

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• Inspect the fuses for circuits related to this system before performing the following procedure.
• When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.

  Click here

• When the sliding roof ECU (sliding roof drive gear assembly) is replaced or removed and reinstalled, it is necessary to perform initialization.*

  Click here

  • *: w/ Sliding Roof System
• Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

  Click here

PROCEDURE

(a) Clear the DTCs.

NEXT

(a) Check for DTCs.

• *: w/ Sliding Roof System

A

USE SIMULATION METHOD TO CHECK

C

GO TO STEP 4

D

GO TO STEP 5

E

GO TO STEP 6

F

GO TO STEP 7

G

GO TO STEP 10

H

GO TO STEP 13

I

GO TO STEP 15

J

GO TO STEP 17

B

(a) Remove the instrument panel junction block assembly.

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

(c) Measure the resistance according to the value(s) in the table below.

HINT:

This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

Standard Resistance:

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the 4H instrument panel junction block assembly connector.

(b) Disconnect the I16 multiplex network master switch assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

Standard Resistance:

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Disconnect the 4H instrument panel junction block assembly connector.

(b) Disconnect the I4 power window regulator motor assembly (front passenger door) connector.

(c) Measure the resistance according to the value(s) in the table below.

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

Standard Resistance:

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Disconnect the I16 multiplex network master switch assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Remove the instrument panel junction block assembly.

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

(c) Measure the resistance according to the value(s) in the table below.

HINT:

This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

Standard Resistance:

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

(a) Disconnect the O3 sliding roof ECU (sliding roof drive gear assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Remove the multiplex network master switch assembly. Click here

*a Component without harness connected (Multiplex Network Master Switch Assembly)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

OK

(a) Disconnect the I20 power window regulator motor assembly (driver door) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Disconnect the 4H instrument panel junction block assembly connector.

(b) Disconnect the I4 power window regulator motor assembly (front passenger door) connector.

(c) Measure the resistance according to the value(s) in the table below.

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Disconnect the 4H instrument panel junction block assembly connector.

(b) Disconnect the J9 power window regulator motor assembly (rear RH door) connector.

(c) Measure the resistance according to the value(s) in the table below.

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Disconnect the 4H instrument panel junction block assembly connector.

(b) Disconnect the J10 power window regulator motor assembly (rear LH door) connector.

(c) Measure the resistance according to the value(s) in the table below.

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

LIN Communication Bus Malfunction (B2325)

DESCRIPTION

If the main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 8 seconds or more, DTC B2325 will be stored.

• *: w/ Sliding Roof System

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.

  Click here

• When the sliding roof ECU (sliding roof drive gear assembly) is replaced or removed and reinstalled, it is necessary to perform initialization.*

  Click here

  • *: w/ Sliding Roof System
• Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

  Click here

PROCEDURE

(a) Disconnect the J20 power window regulator motor assembly (driver door) connector.

(b) Clear the DTCs.

(c) After 8 seconds have elapsed, check if the DTC is output.

B

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

A

(a) Disconnect the I16 multiplex network master switch assembly connector.

(b) Clear the DTCs.

(c) After 10 seconds have elapsed, check if the DTC is output.

B

GO TO STEP 11

A

(a) Disconnect the I4 power window regulator motor assembly (front passenger door) connector.

(b) Clear the DTCs.

(c) After 10 seconds have elapsed, check if the DTC is output.

B

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)

A

(a) Disconnect the J9 power window regulator motor assembly (rear RH door) connector.

(b) Clear the DTCs.

(c) After 10 seconds have elapsed, check if the DTC is output.

B

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)

A

(a) Disconnect the J10 power window regulator motor assembly (rear LH door) connector.

(b) Clear the DTCs.

(c) After 10 seconds have elapsed, check if the DTC is output.

• *1: w/ Sliding Roof System
• *2: w/o Sliding Roof System

B

GO TO STEP 7

C

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)

A

(a) Disconnect the O3 sliding roof ECU (sliding roof drive gear assembly) connector.

(b) Clear the DTCs.

(c) After 10 seconds have elapsed, check if the DTC is output.

A

GO TO STEP 7

B

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

(a) Disconnect the 4H instrument panel junction block assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(c) Disconnect all other connectors in the same circuit.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

• *1: w/ Sliding Roof System
• *2: w/o Sliding Roof System

B

GO TO STEP 10

C

REPAIR OR REPLACE HARNESS OR CONNECTOR

A

(a) Disconnect the 4D instrument panel junction block assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Remove the instrument panel junction block assembly.

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

(c) Measure the resistance according to the value(s) in the table below.

HINT:

This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

Standard Resistance:

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

(a) Using a Techstream, check the waveform.

HINT:

This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

OK:

• *: w/ Sliding Roof System

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Communication Malfunction between ECUs Connected by LIN (B2785)

DESCRIPTION

If the certification ECU (smart key ECU assembly) detects a communication error with an ECU connected to the certification bus lines for 7 seconds or more, DTC B2785 will be stored.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• Before replacing the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator or upper bracket assembly), refer to Registration.

  Click here

• Before performing the inspection, check that DTC B2786 or B278C is not output.

  Click here

• When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

PROCEDURE

(a) Disconnect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

(b) Clear the DTCs.

(c) After 7 seconds have elapsed, check if the DTC is output.

B

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

A

(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

No Response from Steering Lock ECU (B2786)

DESCRIPTION

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or upper bracket assembly) stops for 10 seconds or more.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• Inspect the fuses for circuits related to this system before performing the following procedure.
• Before replacing the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator or upper bracket assembly), refer to Registration.

  Click here

• When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

PROCEDURE

(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Replace the steering lock ECU (steering lock actuator or upper bracket assembly).

for Manual Tilt and Manual Telescopic Steering Column: Click here

for Power Tilt and Power Telescopic Steering Column: Click here

NEXT

(a) Register the recognition codes in the ECUs.

HINT:

Refer to Registration.

Click here

NEXT

(a) Clear the DTCs.

(b) Recheck for DTCs.

OK:

DTC B2786 is not output.

OK

END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Data List / Active Test

DATA LIST / ACTIVE TEST

DATA LIST

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body or Smart Key / Data List.

(e) Read the Data List according to the display on the Techstream.

• *1: w/ Sliding Roof System
• *2: Although the item is displayed on the Techstream, it is not applicable to this vehicle.

Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3).

When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.

CHECK DLC3

(a) Check the DLC3.

Click here

INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery.

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body or Smart Key / Trouble Codes.

(e) Check the details of the DTCs.

Click here

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body or Smart Key / Trouble Codes.

(e) Clear the DTCs.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

• Use the following procedure to troubleshoot the LIN communication system.
• *: Use the Techstream.

PROCEDURE

NEXT

HINT:

• In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
• Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
• The following 5 items are important points for problem analysis:

NEXT

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connectors and terminals to make sure that there are no abnormalities such as a loose connection or deformation.

NEXT

(a) Using the Techstream, check for CAN communication system DTCs.

Click here

B

GO TO CAN COMMUNICATION SYSTEM

A

(a) Using the Techstream, check for LIN communication system DTCs.

Click here

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

(a) Terminals of ECU

Click here

(b) Data List / Active Test

Click here

NEXT

NEXT

NEXT

END

Parts Location

PARTS LOCATION

ILLUSTRATION

ILLUSTRATION

Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.

System Description

SYSTEM DESCRIPTION

LIN COMMUNICATION SYSTEM DESCRIPTION

The LIN communication system is used for communication between the components in the tables below. If communication cannot be performed through LIN communication such as when there is an open or short in a communication line, the master control ECU of the relevant system will store a DTC. Refer to the table below about the communication bus lines and connected components.

HINT:

• Each component has a fail-safe function which operates in the event of a malfunction to protect the system and allow communication between other components to continue.
• In the following table, "○" indicates that the function applies, and "-" indicates that it does not.

• *: w/ Sliding Roof System

System Diagram

SYSTEM DIAGRAM

DOOR BUS LINES

CERTIFICATION BUS LINES

Terminals Of Ecu

TERMINALS OF ECU

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Disconnect the MB main body ECU (multiplex network body ECU) connector.

Click here

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connectors disconnected.

(c) Reconnect the MB main body ECU (multiplex network body ECU) connector.

(d) Check for pulses according to the value(s) in the table below.

• *: w/ Sliding Roof System

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

(a) Disconnect the I20 power window regulator motor assembly (driver door) connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

(c) Reconnect the I20 power window regulator motor assembly (driver door) connector.

(d) Check for pulses according to the value(s) in the table below.

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)

(a) Disconnect the I4 power window regulator motor assembly (front passenger door) connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

(c) Reconnect the I4 power window regulator motor assembly (front passenger door) connector.

(d) Check for pulses according to the value(s) in the table below.

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)

(a) Disconnect the J9 power window regulator motor assembly (rear RH door) connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

(c) Reconnect the J9 power window regulator motor assembly (rear RH door) connector.

(d) Check for pulses according to the value(s) in the table below.

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)

(a) Disconnect the J10 power window regulator motor assembly (rear LH door) connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

(c) Reconnect the J10 power window regulator motor assembly (rear LH door) connector.

(d) Check for pulses according to the value(s) in the table below.

CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Disconnect the I16 multiplex network master switch assembly connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

(c) Reconnect the I16 multiplex network master switch assembly connector.

(d) Check for pulses according to the value(s) in the table below.

CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) (w/ Sliding Roof System)

(a) Disconnect the O3 sliding roof ECU (sliding roof drive gear assembly) connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

(c) Reconnect the O3 sliding roof ECU (sliding roof drive gear assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

(c) Reconnect the G40 certification ECU (smart key ECU assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

(a) Disconnect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

(c) Reconnect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

(d) Check for pulses according to the value(s) in the table below.