Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Inspection Procedure
- CHECK WIRE HARNESS (MPX SWITCH - BATTERY AND BODY GROUND)
- Disconnect the L13 connector.
- Measure the voltage and resistance according to the value(s) in MPX SWITCH - BATTERY AND BODY GROUND (VOLTAGE) and MPX SWITCH - BATTERY AND BODY GROUND (RESISTANCE) .
Voltage
MPX SWITCH - BATTERY AND BODY GROUND (VOLTAGE)Tester Connection Condition Specified Condition L13-12 (BDR)-Body ground Always 10 to 14 V Resistance
MPX SWITCH - BATTERY AND BODY GROUND (RESISTANCE)Tester Connection Condition Specified Condition L13-7 (GND) - Body ground Always Below 1 ohms Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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