Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (ECU-B2)
1. Remove the ECU-B2 fuse from the engine room No. 2 relay block.
2. Measure the resistance of the fuse.
  Standard resistance:
  
  Below 1
NG: REPLACE FUSE

OK: GO TO NEXT STEP.

CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY)

Disconnect the E37 amplifier connector.

Fig 1: Disconnecting E37 Amplifier Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

TERMINALS VOLTAGE SPECIFICATION (CONNECTOR(S) DISCONNECTED)

Tester Connection	Specified Condition
E37-21 (B) - Body ground	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: Disconnecting E37 Amplifier Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the wire harness side connector.

Standard resistance

TERMINALS RESISTANCE SPECIFICATION (CONNECTOR(S) DISCONNECTED)

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

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

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