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.
Diagnostic Test
- INSPECT THE A/C HEATER CONTROL FOR DAMAGE
- Inspect the A/C Heater Control for damage.
Is the A/C Heater Control damaged?
Yes
- Replace the A/C Heater Control in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
No
- Go to step 2
- Inspect the A/C Heater Control for damage.
- INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE EBL MODE SWITCH TO STAY OR STICK IN A PUSHED POSITION
- Inspect the A/C Heater Control for anything that would cause the EBL mode switch to stay or stick in a pushed position.
Is anything present that would cause the EBL mode switch to stay or stick in a pushed position?
Yes
- Repair as necessary.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
No
- Go to step 3
- Inspect the A/C Heater Control for anything that would cause the EBL mode switch to stay or stick in a pushed position.
- CHECK FOR NORMAL EBL MODE SWITCH AND STATUS INDICATOR FUNCTION
- Turn the ignition on.
- Press the EBL mode switch on and off several times while observing the EBL status indicator.
Does the EBL status indicator turn on and off?
Yes
- Go to step 4
No
- Replace the A/C Heater Control in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
- VERIFY THAT DTC B1016-REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW IS STILL ACTIVE
- With the scan tool, erase DTCs.
- Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 10 minutes before proceeding.
- With the scan tool, read DTCs.
Does the scan tool display active: B1016-REAR DEFROST SWITCH REQUEST INPUT CIRCUIT LOW?
Yes
- Replace the A/C Heater Control in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
No
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
Use the Manual With the Right Hardware
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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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