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.
- INSPECT FUSE (RADIO NO. 1, P RR-IG2, P-ACC)
- Remove the RADIO NO. 1, P RR-IG2 and P-ACC fuses from the passenger side junction block.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition RADIO NO. 1 fuse Always Below 1 Ω P, RR-IG2 fuse Always Below 1 Ω TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition P-ACC fuse Always Below 1 Ω NG: REPLACE FUSE
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (ECU - VEHICLE BATTERY AND BODY GROUND)
- Disconnect the R24 ECU connector.
- Measure the voltage and resistance according to the value(s) in the table below
Standard voltage
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Switch Condition Specified Condition R24-1 (+B) - Body ground Always 11 to 14 V R24-13 (IG2) - Body ground Power switch ON (IG) 11 to 14 V R24-14 (ACC) - Body ground Power switch ON (ACC) 11 to 14 V Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition R24-12 (E) - Body ground Always Below 1 Ω NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE MAYDAY ECU TOGETHER WITH MAYDAY BATTERY AND THEN PERFORM REGISTRATION