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.
Circuit/System Testing
- Identify how to disable high voltage.
- Identify how to test for the presence of high voltage.
- Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.
- Perform the High Voltage Disabling procedure.
- Remove the 3-phase cable assembly from the K59 starter generator control module.
- Test for less than 0.5 ohms at each phase by measuring between the following circuits at the cable with a DMM:
- Phase U and phase V
- Phase U and phase W
- If not the specified value Inspect the 3-phase drive motor generator battery cable terminal fasteners at the K59 starter generator control module.
- If any fasteners were loose and no arc-flash damage is present, torque the fasteners and re-assembly the vehicle. Retest for the DTC.
- If any fasteners were loose and arc-flash damage is present, replace the K59 starter generator control module assembly and the 3-phase drive motor generator battery cable assembly.
- Disconnect the 3-phase drive motor generator battery cable assembly from the A15 starter generator.
- Test each cable for continuity from the starter generator connection terminal to the K59 starter generator control module connection terminal.
- If you measure greater than 0.5 ohms, replace the 3-phase drive motor generator battery cable assembly.
- Replace the A15 starter generator and retest for the DTC. If the DTC resets, replace the K59 starter generator control module.
Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
Failure to follow the procedures exactly as written may result in serious injury or death.
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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.