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.

VERIFY THE DTC IS ACTIVE
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 vehicle.
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 at this time?
  
  Yes
  - Go To 2
  No
  - Go To 4
(Y33) LEFT REAR AXLE VENT CONTROL SOLENOID CIRCUIT SHORTED TO GROUND
1. Turn the ignition off.
2. Disconnect the ASCM C2 harness connector.
3. Disconnect the Air Suspension Compressor Assembly harness connector.
4. Measure the resistance between ground and the (Y33) Left Rear Axle Vent Control Solenoid circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (Y33) Left Rear Axle Vent Control Solenoid circuit for a short to ground.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - ASCM VERIFICATION TEST .
  No
  - Go To 3
AIR SUSPENSION COMPRESSOR ASSEMBLY
1. Measure the resistance between (Y13) Pressure Sensor Return circuit and the (Y33) Left Rear Axle Vent Control Solenoid circuit at the ASCM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  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 - ASCM VERIFICATION TEST .
  No
  - Replace the Air Suspension Control Module (ASCM) in accordance with the Service Information. Refer to MODULE, AIR SUSPENSION CONTROL (ASCM), REMOVAL .
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - ASCM VERIFICATION TEST .
INTERMITTENT WIRING, CONNECTORS AND AIR LINES
1. Inspect the intake and exhaust air lines for restrictions, debris, or contamination.
2. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
4. Look for the data to change or for the DTC to reset during the wiggle test.
5. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
6. 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 - ASCM VERIFICATION TEST .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.