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 Verification
Without BTM and/or ATH/ATS
- Ignition ON.
- Verify that DTC B1370, B1380, or B1441 is not set.
- If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If none of the DTCs are set
- If any of the DTCs are set
- Verify the scan tool body control module Accessory parameter changes between Active and Inactive when turning the ignition ON and OFF.
- If the parameter does not change
Refer to Vehicle Will Not Change Power Mode .
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify all available keys are correct for the vehicle. This can be accomplished by comparing the part number that is laser etched on the key to the part number listed in the parts catalog.
- If a key is not correct
Replace the appropriate key.
- Go to next step: If all keys are correct
- If a key is not correct
- Verify that DTC B3055 does not set while attempting to start the vehicle which each available key.
- If DTC B3055 sets when attempting to start the vehicle with only one of the available keys
Replace the appropriate key.
- If DTC B3055 sets when attempting to start the vehicle with all of the available keys
Replace the K89 Immobilizer Control Module.
- Go to next step: If DTC B3055 does not set
- If DTC B3055 sets when attempting to start the vehicle with only one of the available keys
- All OK.
With BTM and/or ATH/ATS
- Ignition ON.
- Verify that DTC B1370, B1380, or B1441 is not set.
- If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If none of the DTCs are set
- If any of the DTCs are set
- Verify the scan tool body control module Accessory parameter changes between Active and Inactive when turning the ignition ON and OFF.
- If the parameter does not change
Refer to Power Mode Mismatch .
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify all available keys are correct for the vehicle. This can be accomplished by comparing the part number that is laser etched on the key to the part number listed in the parts catalog.
- If a key is not correct
Replace the appropriate key.
- Go to next step: If all keys are correct
- If a key is not correct
- Remove the battery from each of the available vehicle keys.
- Verify that DTC B3055 does not set while attempting to start the vehicle which each available key. To start the vehicle with the key battery removed, the key must be placed in the key pocket/slot.
- If DTC B3055 sets when attempting to start the vehicle with only one of the available keys
Replace the appropriate key.
- If DTC B3055 sets when attempting to start the vehicle with all of the available keys
Replace the K89 Immobilizer Control Module.
- Go to next step: If DTC B3055 does not set
- If DTC B3055 sets when attempting to start the vehicle with only one of the available keys
- All OK.
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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.