Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE
1. Remove the A/C and AM1 fuse from the cowl side junction block LH.
2. Measure the resistance of the fuse.
  Standard resistance: Below 1 Ω
NG: REPLACE FUSE

OK: GO TO NEXT STEP

INSPECT IG1 NO. 2 RELAY

Remove the IG1 NO. 2 relay from the cowl side junction block LH.

Measure the resistance of the relay.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (When battery voltage is applied to terminals 1 and 2)

NG: REPLACE IG1 NO. 2 RELAY

Fig 1: Inspecting IG1 No. 2 Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

CHECK WIRE HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND)

Disconnect the A47 A/C amplifier connector.

Measure the voltage and resistance of the wire harness side connector.

Standard voltage

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
IG (A47-22) - GND (A47-12)	Ignition Switch ON	10 to 14 V

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
IG (A47-22) - Body ground	10 kΩ or higher
GND (A47-12) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 2: Identifying A47 A/C Amplifier Connector Terminals

OK: REPLACE AIR CONDITIONING AMPLIFIER