Air Conditioning (Diagnostic Codes & Circuit Tests): Diagnosis Lexus LX J200

INSPECTION PROCEDURE

HINT

Start the engine before inspection. Check the relay or battery if the smart access system with push-button start does not start.

Scheme 361

1. INSPECT FUSE (ECU-IG NO. 2) Remove the ECU-IG NO. 2 fuse from the cowl side junction block LH. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition ECU-IG NO. 2 fuse Always Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY AND BODY GROUND) Disconnect the E35 amplifier connector. Disconnect the E36 amplifier connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition E36-5 (IG+) - Body ground Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition E36-1 (GND) - Body ground Always Below 1 ohms E36-2 (E1) - Body ground E35-6 (E2) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
3. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-385194-S11934742822011021400000)