B1210

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1210: Power ECU Stop

DTC B1210 - Power ECU Stop

DESCRIPTION
HINT:
This DTC is only output on vehicles equipped with a smart access with push-button start.
- This DTC is detected when communication between the power source control ECU stops for more than 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (AM2)
(a) Remove the AM2 fuse from the cowl side junction block RH.
(b) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)





(a) Disconnect the K73 ECU connector.
(b) Measure the resistance and voltage of the wire harness side connector.
Standard voltage:






Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE





(a) Disconnect the K66 and K73 ECU connectors.
(b) Disconnect the W6 junction block connector.
(c) Disconnect the Q13 switch connector.
(d) Measure the resistance of the wire harness side connectors.
Standard resistance:






Result:






C -- REPAIR OR REPLACE HARNESS AND CONNECTOR
B -- REPLACE POWER SOURCE CONTROL ECU AND WIRE HARNESS CONNECTOR
A -- REPLACE POWER SOURCE CONTROL ECU