Service Procedure

The following procedure provides instructions for retrieving specific diagnostic trouble codes (DTCs) and reprogramming the ABS module with new software. If specific ABS DTCs are found, one or both rear wheel bearing assemblies will need to be replaced.

Important:
In order to perform the following procedure, your Tech 2 must be updated with software version 24.001 or later, CD or TIS application 4.0. If your Tech 2 does not have the necessary software, you will need to update it before proceeding.

1. Turn the ignition switch to the ON position.

Important:
In order to perform the following procedure, the diagnostic interface module (CANdi) must be connected between the Tech 2 and the vehicle. Failure to use the CANdi module will result in failure of the Tech 2 to communicate with the necessary module on the vehicle.

2. Connect a Tech 2 (scan tool) and the CANdi module to the vehicle's diagnostic link connector (DLC), power it up and press ENTER.

Important:
Before reprogramming the ABS module, you must retrieve and record the occurrence of ABS DTC C0045 and/or C0050 AND the 2-character symptom byte that follows the DTC. Codes will automatically be erased during the reprogramming.

3. Select DIAGNOSTICS and retrieve any current or stored ABS DTC C0045 and/or C0050 AND the 2-character symptom byte following the DTC. Record these DTC and symptom bytes on the vehicle repair order. If ABS CTS C0045 is found, the LEFT REAR wheel bearing assembly must be replaced. If ABS DTC C0050 is found, the RIGHT REAR wheel bearing must be replaced. Proceed to the next step and perform the Service Programming. Afier programming is complete, proceed to the section titled, "Rear Wheel Bearing Replacement."

Important:
During the service reprogramming in the next step, DTC U2127 may be set in the body control module (BCM) and P1626 in the powertrain control module (PCM). These codes must be cleared immediately following the reprogramming. In addition, the IBCM 1(30 amp) fuse located in the underhood electrical center must be removed for 10 seconds and then reinstalled. Failure to remove and reinstall this fuse will result in the HVAC system not functioning.

4. Select SERVICE REPROGRAMMING.

5. Follow the on-screen instructions and prompts. If necessary, refer to up-to-date Techline Equipment Users Instructions.

6. Clear any DTCs set during the reprogramming.

7. Press the EXIT key as necessary and disconnect the Tech 2 and CANdi module from the vehicle.

8. Open the hood.

9. Remove the battery cover and fuse cover.

10. Remove the IBCM 1 fuse (30 amp) for 10 seconds and then reinstall.

11. Install the fuse cover and battery cover.

12. Close the hood.

Rear Wheel Bearing Replacement

Important:
The following procedure should only be performed if ABS DTC C0045 and/or C0050 were found earlier in the procedure.

1. Raise the vehicle on a suitable hoist and support as necessary.

2. If ABS DTC C0045 was found, remove the LEFT REAR tire and wheel assembly. If ABS DTC C0050 was found, remove the RIGHT REAR tire and wheel assembly. If both ABS DTCs were found, remove both rear tire and wheel assemblies.





3. Remove the two bolts (2) attaching the brake caliper mounting bracket to the knuckle.

Notice:
Support the brake caliper with heavy mechanic's wire, or equivalent, whenever it is separated from its mount and they hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

Important:
DO NOT disconnect the hydraulic brake flexible hose from the caliper.

4. Remove the rear brake caliper mounting bracket and caliper as an assembly and support the assembly with heavy mechanic's wire, or equivalent.

5. Remove the brake rotor. Do not force the rotor off If the rotor is difficult to remove, ease if off by gently rotating it as you pull outward.

6. Disconnect the electrical connector for the wheel speed sensor on the bearing hub.

7. Remove the four nuts attaching the bearing hub assembly to the knuckle and remove the bearing hub and brake backing plate.

8. Position the brake backing plate and new bearing hub assembly to the knuckle and install the four nuts.

Tighten

Tighten the four nuts to 63 Nm (46 lb-ft).

9. Connect the electrical connector to the wheel speed sensor on the bearing hub.

10. Thoroughly clean any rust or corrosion from the mating/mounting surface on the backside of the brake rotor. Verify that there are no foreign particles or debris remaining.

11. Install the brake rotor on the bearing hub flange.

12. Install the rear brake caliper and mounting bracket on the knuckle.

13. Install the two bolts.

Tighten

Tighten the two bolts to 115 Nm (85 lb-ft).

14. Install the rear tire and wheel assembly. Install the wheel nuts.

Tighten

Tighten the wheel nuts to 140 Nm (103 lb-ft).

15. If necessary, perform Steps 3-14 on the other wheel bearing assembly.

16. Lower the vehicle.

17. Pump the brake pedal 2-3 times in order to seat the rear disc brake pads to the rotor.