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. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. With the scan tool, read the DTCs in the ASCM.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 6
(Y45) COMPRESSOR TEMPERATURE SIGNAL SHORTED TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the ASCM C2 harness connector.
3. Disconnect the Air Suspension Compressor Assembly harness connector
4. Turn the ignition on.
5. Measure the voltage of the (Y45) Compressor Temperature Signal circuit.
  Is any voltage present?
  
  Yes
  - Repair the (Y45) Compressor Temperature Signal circuit for a short to voltage.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
(Y45) COMPRESSOR TEMPERATURE SIGNAL OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Measure the resistance of the (Y45) Compressor Temperature Signal circuit between the ASCM C2 harness connector and the Air Suspension Compressor Assembly harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (Y45) Compressor Temperature Signal circuit for an open or high resistance.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
(Y46) COMPRESSOR TEMPERATURE RETURN OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (Y46) Compressor Temperature Return circuit between the ASCM C2 harness connector and the Air Suspension Compressor Assembly harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (Y46) Compressor Temperature Return circuit for an open or high resistance.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
AIR SUSPENSION COMPRESSOR ASSEMBLY
1. 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 .
2. Turn the ignition on.
3. With the scan tool, record and erase DTCs.
4. With the scan tool, read the DTCs in the ASCM.
  Does the DTC remain active?
  
  Yes
  - 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 .
  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.