C1078

C1078-TIRE REVOLUTIONS RANGE PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- When Monitored:
With the ignition on.

- Set Condition:
The DTC will set if the stored tire size is out of range.





1. DTC CONDITION IS PRESENT
1. Turn the ignition on.
2. Observe the ABS Warning Indicator.

Is the ABS Warning Indicator Flashing?

Yes

- Go To 2

No

- Go To 3

2. INCORRECT TIRES PROGRAMMED INTO ANTI-LOCK BRAKE MODULE
1. Inspect all four tires on the vehicle and note the size of each tire.

NOTE: A non-production size tire cannot be programmed into the CAB. The production Powertrain, with the production size tires, is the only emissions certified configuration that is available for reprogramming.

2. Turn the ignition on.
3. With the scan tool, read the tire size that is programmed into the CAB.

Does the displayed tire size match the actual tire size on the vehicle?

Yes

- Replace the Anti-lock Brake Module. Refer to the symptom *Replacing the Anti-lock Brake Module for additional information.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Reprogram the tire size. Make sure that the ignition is on throughout the reprogramming procedure.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

3. WIRING HARNESS INSPECTION
1. Turn the ignition off.
2. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
3. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
4. Refer to any Hotline letters or Technical Service Bulletins that may apply.

Were any problems found?

Yes

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Test Complete.