Diagnostic Test

1) CHECK FOR A DTC C123B-ESP SYSTEM CONTROL TOO LONG
NOTE: If other DTCs are set they must be repaired before continuing.

NOTE: This DTC must be active for the results of this test to be valid.

NOTE: This DTC may set while driving under excessive driving conditions.

Turn the ignition on.

With the scan tool, read and record DTCs.

With the scan tool, read and record Freeze Frame information.

Perform ECU initialization with drive test.

NOTE: Drive test must be performed correctly for ECU to initialize.

Cycle the ignition switch from off to on.

With the scan tool, read and record DTCs.

Does the scan tool display: C123B-ESP SYSTEM CONTROL TOO LONG?

Yes
1. Go To 2).
No
1. Refer to the ABS-INTERMITTENT CONDITION TEST .
2. Perform ABS VERIFICATION TEST .
2) CHECK HYDRAULIC SYSTEM & BRAKE SYSTEM COMPONENT INSTALLATION & FUNCTION
Turn ignition off.

Verify that the Anti-Lock Brakes Module and Hydraulic Control Unit are properly installed.

Verify that the hydraulic system is properly filled and bled.

Verify that the brake system components are installed and functioning properly.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform ABS VERIFICATION TEST .
No
1. Replace the Integrated Control Module in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST .