Diagnostic Test
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- ACTIVE DTC NOTE:
Note: If DTCs P1473, P1474, P1477, or P1478 are present, diagnose those DTCs before proceeding with this one.
- Turn the ignition on.
- With the scan tool, record all Freeze frame data.
- With the scan tool, erase DTCs.
- Turn the ignition off for 75 seconds.
- Start the engine and let idle for one minute.
- With the scan tool, read DTCs.
Did the DTC return?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
- CHECK THE IAD VALVE FOR DEBRIS
- Visually inspect the IAD Valve for any debris that would prohibit the valve from moving freely.
Is the IAD Valve free of debris and moving freely?
Yes
- Go To 3
No
- Clean the Intake Air Diverter Valve.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
- Visually inspect the IAD Valve for any debris that would prohibit the valve from moving freely.
- INTAKE AIR DIVERTER VALVE
- Replace the Intake Air Diverter Valve in accordance with the Service Information. NOTE:
The Intake Air Diverter Valve is part of the Air Box, and cannot be serviced separately.
- Reconnect the IAD Valve harness connector.
- Reconnect the PCM C1 harness connector.
- Turn the ignition on.
- With the scan tool, erase DTCs.
- With the scan tool, read DTCs.
Did the DTC return?
Yes
- Replace Powertrain Control Module in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
No
- Repair complete.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
- Replace the Intake Air Diverter Valve in accordance with the Service Information.