Diagnostic Test
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR AN ACTIVE DTC NOTE:
This DTC must be active for the results of this test to be valid and this DTC may set while driving under severe load conditions.
- Turn the ignition on.
- With the scan tool, read ABS DTCs and record on the repair order.
- With the scan tool, read and record Freeze Frame information.
- With the scan tool, erase DTCs.
- Cycle the ignition switch from off to on.
- Start the engine and raise the engine RPM to 2500.
- With the scan tool, read ABS DTCs.
Is the DTC active?
Yes
- Go To 2
No
- Perform the ABS-INTERMITTENT CONDITION TEST. Refer to STANDARD PROCEDURE .
- CHECK ENGINE IDLE
- Allow the engine to idle.
Does the engine run rough at idle?
Yes
- Replace the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to REMOVAL or MODULE, POWERTRAIN CONTROL, (PCM) 6.7L DIESEL, REMOVAL .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to 5.7L - DIAGNOSTIC TEST or 5.7L CNG - DIAGNOSTIC TEST or 6.4L - DIAGNOSTIC TEST or POWERTRAIN VERIFICATION TEST - 6.7L .
No
- Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL .
- Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- Allow the engine to idle.