B1297

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1297: Clearance Sonar ECU Communication Stop

DTC B1297 - Clearance Sonar ECU Communication Stop

DESCRIPTION





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPERATION
(a) Turn the engine switch on (IG) and clearance sonar main switch ON. Check that the combination meter displays the graphic of system check operation for approximately 2 seconds as it checks for an open circuit and a malfunction in the sensor. Also, check that the buzzer emits a sound for approximately 1 second.
OK:
System check graphic is displayed on combination meter for approximately 2 seconds and buzzer sound is emitted for approximately 1 second.
NG -- INSPECT FUSE (LH-IG)
OK -- REPLACE CLEARANCE SONAR ECU
2. INSPECT FUSE (LH-IG)
(a) Remove the LH-HG fuse from the junction block.
(b) Measure the and resistance of the wire harness side connector.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.

3. CHECK WIRE HARNESS (CLEARANCE SONAR ECU - BODY GROUND)




(a) Disconnect the A38 ECU connector.
(b) Measure the voltage and resistance of the wire harness side connector.
Standard voltage:






Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

4. CHECK RESISTANCE OF COMMUNICATION LINE




(a) Disconnect the A38 ECU connector.
(b) Disconnect the K66 ECU connector.
(c) Measure the resistance between the wire harness side connectors.
Standard:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE CLEARANCE SONAR ECU