Dtc B1279 Rain Sensor Communication Stop
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK WIRE HARNESS (RAIN SENSOR - BATTERY AND BODY GROUND)
CHECK RESISTANCE OF COMMUNICATION LINE
DTC B1279 Rain Sensor Communication Stop |
DESCRIPTION
This DTC is detected when communication between the rain sensor and gateway ECU stops for more than 10 seconds.DTC No.
| DTC Detection Condition
| Trouble Area
|
B1279
| Rain sensor communication stops
| - Rain sensor
- 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 B1279, repair the "+B or GND short malfunction of communication bus" DTCs first.
| 1.CHECK WIRE HARNESS (RAIN SENSOR - BATTERY AND BODY GROUND) |
Disconnect the R7 connector.
Measure the voltage and resistance of the wire harness side connector.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
SIG (R7-1) - Body ground
| Engine switch on (IG)
| 10 to 14 V
|
- Standard resistance:
Tester Connection
| Specified Condition
|
ES (R7-3) - Body ground
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 2.CHECK RESISTANCE OF COMMUNICATION LINE |
Disconnect the R7 and R5 ECU connectors.
Measure the resistance between the specified terminals on the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
MPX (R7-2) - MPX1 (R5-37)
| Below 1 Ω
|
MPX (R7-2) - Body ground
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
