EBC 445 ESP

C1239-EMISSION ROLLS TEST ACTIVE

For a complete wiring diagram Refer to Diagrams/Electrical.


- When Monitored:
Continuously with the ignition on and no BUS communication failure DTCs present.

- Set Condition:
If the Anti-lock Brake Module receives two messages in a row indicating that the extended diagnostic session is active. ABS is inhibited during the extended diagnostic session.







Diagnostic Test


1. DTC IS PRESENT

NOTE: Ensure the battery is fully charged.

Turn the ignition on.
With the scan tool clear DTCs.
Turn the ignition off.
Turn the ignition on.
With the scan tool select View DTCs in the Anti-lock Brake Module.
Is the status Active for this DTC?

Yes


- Go To 2


No


- Go To 3



2. ANTI-LOCK BRAKE MODULE
Turn the ignition on.
With the scan tool, select View DTCs in each module on the CAN B BUS and the CAN C BUS.
Are there CAN BUS communication DTCs present in any other module?

Yes


- Perform the appropriate diagnostic procedure before continuing with this test.
- Perform ABS VERIFICATION TEST. ABS Verification Test


No


- Replace the Anti-lock Brake Module.
- Perform ABS VERIFICATION TEST. ABS Verification Test



3. INTERMITTENT COMMUNICATION DTC
The condition necessary to set this DTC is not present at this time.
This DTC will set if the Anti-lock Brake Module receives 2 messages in a row from the FCM indicating that the Emissions Rolls test is active.
With the scan tool, select View DTCs in each of the modules on the CAN B BUS and the CAN C BUS. If there are any communications DTCs present, perform the appropriate diagnostic procedure.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?

Yes


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


No


- Test Complete.