Inspection Procedure
WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK WIRE HARNESS (MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND)
- Disconnect the M7 connector.
- Measure the voltage and resistance according to the value(s) in MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND (VOLTAGE) and MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND (RESISTANCE) .
Voltage
MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND (VOTAGE)Tester Connection Condition Specified Condition M7-9 (CPUB) - Body ground Always 10 to 14 V M7-10 (BDR) - Body ground Always 10 to 14 V M7-20 (SIG) - Body ground Engine switch on (IG) 10 to 14 V Resistance
MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND (RESISTANCE)Tester Connection Condition Specified Condition M7-2 (GND) - Body ground Always Below 1 ohms Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE