C1239-EMISSION ROLLS TEST ACTIVE

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

When Monitored:
Continuously with the ignition on and the Totally Integrated Power Module (TIPM) has the Emissions Test Mode bit set.
Set Condition:
If the Anti-lock Brake System (ABS) Module receives two messages in a row indicating that the Totally Integrated Power Module (TIPM) has been requested to activate the Emission Rolls Test.

Possible Causes
EMISSION ROLLS TEST ENABLED
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
TOTALLY INTEGRATED POWER MODULE (TIPM)

1. VERIFY THE DTC IS ACTIVE

1.	Turn the ignition on.

2.	With the scan tool record and erase the DTCs.

3.	Turn the ignition off.

4.	Turn the ignition on.

5.	Using the scan tool, read the DTCs.

Is the DTC active at this time?

Yes

2. EMISSION ROLLS TEST ENABLED

1.	Turn the ignition on.

2.	Using the scan tool, under "Miscellaneous Functions" DISABLE the Emission Rolls Test in the TIPM.

3.	With the scan tool, erase the DTCs.

4.	Turn the ignition off and wait ten seconds.

5.	Turn the ignition on.

6.	Using the scan tool, the read DTCs in ABS.

Does the DTC remain active?

Yes

Test complete, the condition or conditions that originally set this DTC are not present at this time.

3. ANTI-LOCK BRAKE SYSTEM (ABS) MODULE

1.	Turn the ignition off.

2.	Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. (Refer to 08 - Electrical/8E - Electronic Control Modules/MODULE, Anti-Lock Brake System - Removal) .

3.	Turn the ignition on.

4.	Using the scan tool, read DTCs in the ABS.

Is the DTC still remain active?

Yes

Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information. (Refer to 08 - Electrical/8E - Electronic Control Modules/MODULE, Totally Integrated Power (TIPM) - Removal).