B2620

STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: B2620: ECU Power Source Circuit Malfunction

DTC B2620 - ECU Power Source Circuit Malfunction

DESCRIPTION

The ECU power source circuit supplies positive voltage to the multiplex tilt and telescopic ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ECU-B1)




(a) Remove the ECU-B1 fuse from the engine room junction block.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BATTERY)




(a) Disconnect the H57 multiplex tilt and telescopic ECU connector.
(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





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

3. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)




(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU