Open in One Side of Bus 5 Branch Line
DESCRIPTION
When the CAN
bus main lines are normal (no open, short to ground, short to +B or
short between lines) and there is an ECU or sensor on the "Communication
Bus Check" screen that is indicated as not communicating or whose
connection status on the "Communication Bus Check" screen changes
intermittently, an open in one of the wires of a CAN bus branch line is
suspected.
HINT:
If there is
an ECU or sensor whose connection status changes intermittently while
checking the "Communication Bus Check" screen, there may be an open
circuit in one of the wires of a branch line of an ECU or sensor in the
bus. If an open occurs in one of the wires of a CAN branch line, it may
interfere with the communication of other ECUs or sensors resulting in
an incorrect state being displayed.
|
Symptom | Trouble Area |
|
There
is an ECU or sensor that is indicated as not communicating on the
"Communication Bus Check" screen or whose connection status on the
"Communication Bus Check" screen changes intermittently. |
One side of CAN branch line is open, or output signals are incomplete.
- Outer mirror control ECU assembly LH
(w/ Seat Position Memory System)
- Outer mirror control ECU assembly RH
(w/ Seat Position Memory System)
- Headlight ECU sub-assembly RH
(w/ Cornering Light)
- Headlight ECU sub-assembly LH
(w/ Cornering Light)
- Position control ECU assembly LH
(w/ Seat Position Memory System)
- Certification ECU (smart key ECU assembly)
- Multiplex tilt and telescopic ECU
(w/ Power Tilt and Power Telescopic System)
- Meter mirror sub-assembly
(w/ Headup Display System)
- Main body ECU (multiplex network body ECU)
- Air conditioning amplifier assembly
|
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
PROCEDURE
|
1. | CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH LINE |
(a) Based on the vehicle equipment and specifications, confirm the systems that use CAN communication.
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(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Using the Techstream, perform "CAN Bus Check".
CAN Bus Check
(f) Observe the screen for approximately 2 minutes to check for ECUs and sensors that are displayed as not communicating.
(g) Perform the inspection as specified in the Problem Symptoms Table for the ECUs or sensors that are not communicating.
| NEXT |
 | GO TO CORRESPONDING COMMUNICATION STOP MODE |
Parking Assist ECU Communication Stop Mode
DESCRIPTION
|
Detection Item | Symptom |
Trouble Area |
| Parking Assist ECU Communication Stop Mode |
Any of the following conditions are met:
- Communication stop for "Panoramic View Monitor / Circumference
Monitoring Camera Control Module" is indicated on the "Communication Bus
Check" screen of the Techstream.
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- Communication stop history for "Panoramic View Monitor / Circumference
Monitoring Camera Control Module" is indicated on the "Communication Bus
Check (Detail)" screen of the Techstream. (The Lost Communication Time
value for "Panoramic View Monitor / Circumference Monitoring Camera
Control Module" is 6 or more.)
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- Communication system DTCs (DTCs that start with U) that correspond to
"Parking Assist ECU Communication Stop Mode" in "DTC Combination Table"
are output.
Click here
|
- Parking assist ECU branch line or connector
- Power source circuit of parking assist ECU
- Parking assist ECU ground circuit
- Parking assist ECU
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
HINT:
- Before disconnecting related connectors for inspection, push in on each
connector body to check that the connector is not loose or disconnected.
- When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
|
1. | CHECK FOR OPEN IN CAN BUS LINES (PARKING ASSIST ECU BRANCH LINE) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the K35 parking assist ECU connector.
| (c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
K35-12 (CANH) - K35-13 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
54 to 69 Ω | |
 |
|
*a | Front view of wire harness connector
(to Parking Assist ECU) | | |
| NG |
 | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (PARKING ASSIST ECU) |
|
OK |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
| (a) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
K35-3 (GND1) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
Below 1 Ω | |
 |
|
*a | Front view of wire harness connector
(to Parking Assist ECU) | | |
(b) Reconnect the cable to the negative (-) auxiliary battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|
K35-2 (+B) - Body ground |
Power switch off | 11 to 14 V |
|
K35-6 (IG) - Body ground |
Power switch on (IG) |
11 to 14 V |
|
K35-1 (ACC) - Body ground |
Power switch on (ACC) |
11 to 14 V |
| OK |
| REPLACE PARKING ASSIST ECU |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
