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.

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 6
AIR SUSPENSION COMPRESSOR ASSEMBLY VALVE SOLENOID SHORTED
1. Turn the ignition off.
2. Disconnect the ASCM C2 harness connector.
3. Measure the resistance between the (Y30) 12V Valve Power Supply circuit and the (Y35) Air Tank Enable Solenoid at the ASCM C2 harness connector.
  Is the resistance below 2 Ohms?
  
  Yes
  - Go To 3
  No
  - Go To 4
(Y30) 12V POWER SUPPLY CIRCUIT SHORTED TO (Y35) AIR TANK ENABLE SOLENOID CIRCUIT
1. Disconnect the Air Suspension Compressor Assembly harness connector.
2. Measure the resistance between the (Y30) 12V Valve Power Supply circuit and the (Y35) Air Tank Enable Solenoid circuit at the ASCM C2 harness connector.
  Is the resistance below 5 Ohms?
  
  Yes
  - Repair the short between (Y30) 12V Valve Power Supply circuit and the (Y34) RR Air Spring Valve Control circuit.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - 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 .
(Y30) 12V POWER SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (Y30) 12V Valve Power Supply circuit between the ASCM C2 harness connector and the Air Suspension Compressor Assembly harness connector.
  Is the resistance below 5 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (Y30) 12V Valve Power Supply circuit for an open or high resistance.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(Y35) AIR TANK ENABLE SOLENOID CIRCUIT OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (Y35) Air Tank Enable Solenoid circuit between the ASCM C2 harness connector and the Air Suspension Compressor Assembly harness connector.
  Is the resistance above 5 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 .
  No
  - Repair the (Y34) RR Air Spring Valve Control circuit for an open or high resistance.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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 air suspension 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 .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.