Inspection Procedure

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

Check POWER, ECU-B and ECU-IG fuse .
CHECK : continuity of POWER, ECU-B and ECU-IG fuse.

OK : Continuity
1. NG : Replace the failure fuse.
2. OK : Go to next step.
Check voltage between terminals POWE, SIG, BDR, BECU and GND of back door ECU connector.
PREPARATION : turn ignition switch ON.

CHECK : measure voltage between terminals SIG, and GND.

OK : Voltage: 10-14 V

PREPARATION:
1. Turn ignition switch OFF.
2. Disconnect the back door ECU connector.
CHECK : measure voltage between terminals BDR, BECU and GND.

OK : Voltage: 10-14V
1. OK : Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS .
2. NG : Go to next step.
Check wire harness and connector between ECU and body ground . See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS .
1. NG: Repair or replace wire harness or connector.
2. OK: Check and repair wire harness and connector between ECU and battery.