Driver Side Door ECU Power Source Circuit

DOOR LOCK: KEY REMINDER WARNING SYSTEM: Driver Side Door ECU Power Source Circuit

Driver Side Door ECU Power Source Circuit

DESCRIPTION

This circuit supplies power to operate the multiplex network door ECU front LH (driver door ECU).

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (MPX-B1, AM1, MPX-IG, D DOOR, D/C CUT)
(a) Remove the MPX-IG and AM1 fuses from the driver side junction block.
(b) Remove the MPX-B1 fuse from the passenger side junction block.
(c) Remove the D DOOR and D/C CUT fuses from the engine room No. 1 relay block.
(d) Measure the resistance of the fuses.
Standard:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. INSPECT IG1 RELAY




(a) Remove the IG1 relay from the driver side junction block.
(b) Measure the resistance of the relay.
Standard resistance:






NG -- REPLACE IG1 RELAY
OK -- Continue to next step.
3. CHECK WIRE HARNESS (ECU - BATTERY AND BODY GROUND)




(a) Disconnect the D19 ECU connector.
(b) Measure the voltage and resistance of the wire harness side connector.
Standard voltage:





Standard resistance





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MULTIPLEX NETWORK FRONT DOOR ECU LH