Inspection Procedure

WARNING: This page is about a different car, the 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Check ECU-B fuse.
CHECK:

Check continuity of ECU-B fuse.

OK:
1. Continuity
1. NG : Replace the failure fuse.
2. OK : Go to Next Step
Check voltage between terminals +B and GND of transponder key ECU connector.
PREPARATION:
1. Turn ignition switch OFF.
2. Disconnect the Transponder key ECU connector.
CHECK:

Measure voltage between terminals +B and GND.

OK:
1. Voltage: 10 - 14 V
1. OK : Proceed to next circuit inspection shown in PROBLEM SYMPTOMS TABLE .
2. NG : Go to Next Step
Check wire harness and connector between terminal GND of transponder key ECU and body ground (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG : Repair or replace wire harness or connector.
2. OK : Check and repair wire harness and connector between transponder key ECU and Battery.