Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
Make sure that the vehicle has no payload and is parked on level ground.
1. Perform any Service Bulletins that may apply.
2. Turn the ignition on.
3. With the scan tool, read and record the Environmental Data to help identify the conditions in which the DTC was set.
4. Start the Engine.
5. With the scan tool, record and erase DTCs.
6. Place the vehicle in "Transport Mode" switch to ON.
7. Wait 45 seconds.
8. With the vehicle in "Transport Mode" switch to OFF.
9. Wait 45 seconds.
10. With the scan tool, read ASCM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Go To 6
AIR SUSPENSION INTAKE/EXHAUST LINE RESTRICTED, DEBRIS, OR CONTAMINATION
1. Turn the ignition off.
2. Inspect the intake/exhaust air lines for restrictions, debris, or contamination.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
AIR SUSPENSION LINE BLOCKED OR RESTRICTED
1. Inspect the Air Lines for damaged or kinked lines. Refer to DIAGNOSIS AND TESTING .
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4

LEFT REAR AIR SPRING PRESSURE

Start the Engine and run for 5 minutes.
With the scan tool, under "Miscellaneous Functions" run the "Component Air Mass/Pressure/Ride Height Readings" routine.

With the scan tool, read and record the left rear air spring pressure.

Air Spring Pressure Values
DJ	D2
7.6 bar (110 psi)	10.8 bar (157 psi)

Is the left rear air spring pressure above (use the table)?

Yes

Go To 5

Replace the Air Suspension Control Module (ASCM) in accordance with the Service Information. Refer to MODULE, AIR SUSPENSION CONTROL, REMOVAL .
Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

AIR SUSPENSION CONTROL MODULE (ASCM)
1. Replace the Air Suspension Control Module (ASCM) in accordance with the Service Information. Refer to MODULE, AIR SUSPENSION CONTROL, REMOVAL .
2. With the scan tool, erase the DTCs in the ASCM.
3. Cycle the ignition switch from off to on.
4. With the scan tool, read the DTCs in the ASCM.
  Does the DTC remain active?
  
  Yes
  - Replace the Air Suspension Compressor Assembly in accordance with the Service Information. Refer to COMPRESSOR ASSEMBLY, AIR SUSPENSION, REMOVAL .
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.
INTERMITTENT WIRING AND CONNECTORS
1. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
2. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
3. Look for the data to change or for the DTC to reset during the wiggle test.
4. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
5. Look for the data to change other than as expected or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.