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

ECU power source circuit supply the battery positive voltage to the multiplex tilt and telescopic ECU.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT BATTERY VOLTAGE
Standard voltage:
10 to 14 V
NG -- INSPECT CHARGING SYSTEM
OK -- Continue to next step.
2. INSPECT FUSE (ECU-B)




(a) Remove the ECU-B fuse from the engine room R/B.
(b) Check continuity of the ECU-B fuse.
Standard resistance:
Below 1 Ohms (Continuity)
NG -- REPLACE FUSE
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BATTERY)




(a) Disconnect the multiplex tilt and telescopic ECU connector.
(b) Measure the voltage between terminal ECUB and GND of the ECU connector.
Standard voltage:
10 to 14 V
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)




(a) Measure the resistance between terminal GND of the ECU connector and body ground.
Standard resistance:
Below 1 Ohms
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU