Open in One Side of Bus 3 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.
|
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.
Click here 
(b) Connect the Techstream to the DLC3.
(c) Turn the engine 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 |
Open in One Side of Bus 4 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.
- Occupant detection ECU
- Tire pressure warning ECU and receiver
- Rack and pinion power steering gear assembly
- Brake actuator assembly
- Steering sensor
- Absorber control ECU
(w/ AVS System)
|
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.
Click here 
(b) Connect the Techstream to the DLC3.
(c) Turn the engine 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 |
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.
Click here 
(b) Connect the Techstream to the DLC3.
(c) Turn the engine 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 |
