Inspection Procedure
WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT FUSE (HEATER)
- Remove the HEATER fuse from the instrument panel J/B.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RESISTANCE REFERENCE CHARTTester item Condition Specified condition HEATER fuse Always Below 1 Ω
NG: REPLACE FUSE (HEATER)
OK: Go to Next Step
- INSPECT AIR CONDITIONING AMPLIFIER
- Remove the A/C amplifier with the connectors still connected.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
VOLTAGE SPECIFICATIONTester connection (Symbols) Condition Specified condition A8-1 (IG+) - A8-6 (GND) Ignition switch: ON 10 to 14 V
NG: Go to step 3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
- CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND)
- Disconnect the connector from the A/C amplifier.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
VOLTAGE SPECIFICATIONTester connection (Symbols) Condition Specified condition A8-1 (IG+) - Body ground Ignition switch: ON 10 to 14 V
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to Next Step
- CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RESISTANCE REFERENCE CHARTTester connection (Symbols) Condition Specified condition A8-6 (GND) - Body ground Always Below 1 Ω
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE AIR CONDITIONING AMPLIFIER
- Measure the resistance according to the value(s) in the table below.