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.

NOTE: With this inspection, the driver door ECU CPU can be diagnosed if it works normally or not.

Check driver door ECU.
CHECK: if the driver door window glass auto up.
1. NG: Replace the driver door ECU.
2. OK: Go to 2.
Check wire harness.
PREPARATION: Disconnect connector "B8" of body ECU and "P9" of driver door ECU.

CHECK: continuity between terminal RX of body ECU and MPX1 of driver door ECU.

Fig 1: Locating Body ECU Terminal RX & Driver Door ECU Terminal MPX1
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: There is a continuity in wire harness.

NOTE: If there is OPEN in wire harness, please repair it.
1. NG: Repair or replace wire harness.
2. OK: Replace the driver door ECU.