Dtc B1296 Front Light Ecu Communication Stop
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT FUSE (MPX-B)
CHECK WIRE HARNESS (FRONT CONTROLLER - BATTERY AND BODY GROUND)
CHECK RESISTANCE OF COMMUNICATION LINE
DTC B1296 Front Light ECU Communication Stop |
DESCRIPTION
This DTC is detected when communication between the front controller and gateway ECU stops for more than 10 seconds.DTC No.
| DTC Detection Condition
| Trouble Area
|
B1296
| Front controller communication stops
| - Front controller
- Wire harness
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1296, repair the "+B or GND short malfunction of communication bus" DTCs first.
Remove the MPX-B fuse from the engine room J/B No. 1.
Measure the resistance of the fuse.
- Standard resistance:
- Below 1 Ω
| 2.CHECK WIRE HARNESS (FRONT CONTROLLER - BATTERY AND BODY GROUND) |
Disconnect the 2E and 2F ECU connectors.
Measure the voltage and resistance of the wire harness side connectors.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
2E-4 - Body ground
| Always
| 10 to 14 V
|
- Standard resistance:
Tester Connection
| Specified Condition
|
2F-1 - Body ground
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK RESISTANCE OF COMMUNICATION LINE |
Disconnect the 2F, A30 and J55 ECU connectors.
Measure the resistance between the specified terminals on the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
2F-6 - MPX2 (A30-17)
| Below 1 Ω
|
2F-5 - MPX2 (J55-24)
| Below 1 Ω
|
- Result:
Result
| Proceed to
|
Both are OK
| A
|
One is OK
| B
|
Both are NG
| C
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE FRONT CONTROLLER |
|
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
