Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

Check POWER and JCB M-fuses, and MPX-B and ECU-IG fuses.
CHECK:

Check the continuity of the POWER and JCB M-fuses, and MPX-B and ECU-IG fuse.

OK:
1. Continuity
1. NG: Replace failure fuse.
2. OK: Go to next step
Check voltage between terminals POWE/ECU-B/IG and GND of back door ECU connector.
PREPARATION:

Turn the ignition switch ON.

CHECK:

Measure the voltage between terminals IG and GND.

OK:
1. Voltage: 10-14 V
PREPARATION:
1. Turn the ignition switch OFF.
2. Disconnect the back door ECU connector.
CHECK:

Measure the voltage between terminals POWE/ECU-B and GND.

OK:
1. Voltage: 10 - 14 V
1. OK: Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLES .
2. NG: Go to next step
Check HARNESS AND CONNECTOR BETWEEN BACK DOOR ECU AND BODY GROUND .
1. NG: Repair or replace harness or connector.
2. OK: Check and repair harness and connector between back door ECU and battery.