Inspection Procedure

CHECK: 

Check the continuity of the POWER M-fuse, the WIPER, ACC, HORN, HAZ, MPX-B and ECU-IG fuses.

OK: 

1. Continuity 

1. NG Replace failure fuse. 
2. OK Go to next step 

PREPARATION: 

1. Disconnect the 2 connectors and remove the cover.
2. Turn the ignition switch ON.

CHECK: 

Measure the voltage between terminals WIPER, ECU-IG and body ground.

Fig 1: Locating & Testing WIPER, ECU-IG Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: 

1. Voltage: 10 - 14 V 

PREPARATION: 

Turn the ignition switch OFF.

CHECK: 

Measure the voltage between terminals HORN, HAZ, POWER and body ground.

OK: 

1. Voltage: 10 - 14 V 

Fig 2: Locating & Testing HORN, HAZ, POWER Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

PREPARATION: 

Turn the ignition switch ON.

CHECK: 

Measure the voltage between terminal ACC and body ground.

Fig 3: Locating & Testing ACC Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: 

1. Voltage: 10 - 14 V 

PREPARATION: 

Turn the ignition switch OFF.

CHECK: 

Measure the voltage between terminal ECU-B and body ground.

Fig 4: Locating & Testing ECU-B Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: 

1. Voltage: 10 - 14 V 

1. NG Proceed to next circuit inspection shown on problem symptoms table. See  PROBLEM SYMPTOMS TABLE  . 
2. OK Go to next step 

PREPARATION: 

Disconnect the 2 connectors and remove the cover.

CHECK: 

Check the continuity between terminal GND and body ground.

Fig 5: Locating GND Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: 

1. Continuity 

1. NG Repair or replace driver side J/B, harness or connector. 
2. OK Replace driver side J/B.