Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (ECU-IG2)
1. Remove the ECU-IG2 fuse from the instrument panel junction block.
2. Measure the resistance of the fuse.
  Standard resistance:
  
  Below 1 Ω
NG: REPLACE FUSE

OK: Go to next step

CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY)

Disconnect the E37 amplifier connector.

Fig 1: Identifying E37 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
E37-1 (IG+) - Body ground	Ignition switch ON	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BODY GROUND)

Disconnect the E37 amplifier connector.

Fig 2: Identifying E37 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the wire harness side connector.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
E37-14 (GND) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE