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.
No Response From Powertrain Control Module
For a complete wiring diagram, refer to appropriate Wiring Diagram.
| Possible Causes |
|---|
| FUSED B(+) CIRCUITS A209 OPEN OR SHORTED |
| GROUND CIRCUITS Z901 OPEN |
| FUSED IGNITION SWITCH RUN/START CIRCUIT F202 OPEN OR SHORTED |
| FUSED IGNITION SWITCH OFF/RUN/START CIRCUIT F1 OPEN OR SHORTED |
| FUSED ASD RELAY OUTPUT CIRCUIT F342 OPEN OR SHORTED |
| CAN C BUS (+) CIRCUIT D65 OPEN |
| CAN C BUS (-) CIRCUIT D64 OPEN |
| POWERTRAIN CONTROL MODULE |
Test Step 1 - Test for Intermittent Condition
Check for any TSBs related to the condition. Perform any applicable procedures outlined in the TSBs before continuing.
- Turn the ignition on.
Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
- With the scan tool, select ECU View.
A red X will be next to the module that is not communicating, indicating that the module is not active on the bus network. A green check indicates that the module is active on the bus network.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.