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 step 2 .
Check Voltage Between Terminals POWER, 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 TABLE .
2. NG : Go to step 3.
Check Wiring Harness And Connector Between ECU And Body Ground.
1. NG : Repair or replace wiring harness or connector.
2. OK : Check and repair wiring harness and connector between ECU and battery.