Inspection Procedure
WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
Start the engine before inspection. Check the P-IG relay 1 or battery if the smart access system with push-button start does not start.
- INSPECT FUSE (P-IG1-1)
- Remove the P-IG1-1 fuse from the passenger side junction block.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTOR SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition P-IG1-1 fuse Always Below 1 Ω
NG: REPLACE FUSE
OK: Go to Next Step
- CHECK AIR CONDITIONING AMPLIFIER (IG+ VOLTAGE)
- Remove the air conditioning amplifier with its connectors still connected (see REMOVAL )
- Measure the voltage according to the value(s) in the table below
Standard voltage
TESTER CONNECTOR SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition L76-5 (IG+) - L76-1 (GND) Power switch ON (IG) 11 to 14 V L76-5 (IG+) - L76-2 (FGND) L76-5 (IG+) - L77-6 (RGND)
NG: Go to step 3
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
- CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY AND BODY GROUND)
- Disconnect the L76 and L77 air conditioning amplifier connectors
- Measure the voltage according to the value(s) in the table below
Standard voltage
TESTER CONNECTOR SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition L76-5 (IG+) - Body ground Power switch OFF Below 1 V Power switch ON (IG) 11 to 14 V - Measure the resistance according to the value(s) in the table below
Standard resistance
TESTER CONNECTOR SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition L76-1 (GND) - Body ground Always Below 1 Ω L76-2 (FGND) - Body ground L77-6 (RGND) - Body ground
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )