Inspection Procedure

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

Check PWR1, AM1 and DOME fuse.
CHECK: continuity of PWR1, AM1 and DOME fuse.

OK: Continuity.
1. NG: Replace the failed fuse.
2. OK : Go to 2.
Check voltage between terminals B, CPUB, IG and GND of driver door ECU connector.
PREPARATION: Turn ignition switch ON.

CHECK: Measure voltage between terminals IG, and GND.

OK: Voltage: 10 - 14V.

PREPARATION
1. Turn ignition switch OFF.
2. Disconnect the driver door ECU connector.
CHECK: Measure voltage between terminals B, CPUB and GND.

OK: Voltage: 10 - 14V.
1. OK: Proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLES .
2. NG: Go to 3.
Check wire harness and connector between ECU and body ground.
1. NG: Repair or replace wire harness or connector.
2. OK : Check and repair wire harness and connector between ECU and battery.