Inspection Procedure
WARNING: This page is about a different car, the 2007 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT FUSE (A/C (HTR))
- Remove the A/C (HTR) fuse from the driver side junction block.
- Measure the resistance of the fuse.
Standard resistance: Below 1 Ω
NG : REPLACE FUSE
OK : GO TO NEXT STEP
- CHECK AIR CONDITIONING AMPLIFIER (IG VOLTAGE)
- Remove the air conditioning amplifier with connectors still connected.
- Measure the voltage of the wire harness side connector.
Standard voltage
TERMINALS VOLTAGE SPECIFICATIONSTester Connection Condition Specified Condition A8-5 (IG) - A8-1 (GND) Power switch ON (IG) 10 to 14 V
NG : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG : GO TO NEXT STEP
- CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY AND BODY GROUND)
- Measure the voltage of the wire harness side connector.
Standard voltage
TERMINALS VOLTAGE SPECIFICATIONSTester Connection Condition Specified Condition A8-5 (IG) - Body ground Power switch ON (IG) 10 to 14 V - Measure the resistance of the wire harness side connector.
Standard resistance
TERMINALS RESISTANCE SPECIFICATIONSTester Connection Specified Condition A8-1 (GND) - Body ground Below 1 Ω
NG : REPAIR OR REPLACE HARNESS AND CONNECTOR
OK : REPLACE AIR CONDITIONING AMPLIFIER
- Measure the voltage of the wire harness side connector.