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. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. With the scan tool, read the ASCM DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 8
AIR SUSPENSION COMPRESSOR ASSEMBLY HARNESS CONNECTOR
NOTE:
Make sure the Air Suspension Compressor Assembly harness connector is connected correctly.
1. Turn the ignition off.
2. Inspect the Air Suspension Compressor Assembly harness connector for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - ASCM VERIFICATION TEST .
  No
  - Go To 3
(Y10) SENSOR FEED CIRCUIT OPEN OR HIGH RESISTANCE
1. Disconnect the Air Suspension Compressor Assembly harness connector.
2. Disconnect the ASCM C2 harness connector.
3. Measure the resistance of the (Y10) Sensor Feed 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 (Y10) Sensor Feed Circuit for an open or high resistance.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - ASCM VERIFICATION TEST .
  No
  - Go To 4
(Y18) PRESSURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (Y18) Pressure Sensor 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 (Y18) Pressure Sensor Signal circuit for an open or high resistance.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - ASCM VERIFICATION TEST .
  No
  - Go To 5
(Y18) PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
1. Measure the resistance between ground and the (Y18) Pressure Sensor Signal circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (Y18) Pressure Sensor Signal circuit for a short to ground.
  - Perform the ASCM VERIFICATION TEST. Refer to STANDARD PROCEDURE - ASCM VERIFICATION TEST .
  No
  - Go To 6
AIR SUSPENSION SOLENOID ASSEMBLY PRESSURE SENSOR SIGNAL
1. Connect the Air Suspension Compressor Assembly harness connector.
2. Measure the resistance between the (Y18) Pressure Sensor Signal circuit and the (Y13) Common Sensor Return circuit at the ASCM C2 harness connector.
  Is the resistance above 60k 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
  - Go To 7
AIR SUSPENSION COMPRESSOR ASSEMBLY 5 VOLT SUPPLY
1. Measure the resistance between the (Y10) Sensor Feed circuit and the (Y13) Common Sensor Return circuit at the ASCM C2 harness connector.
  Is the resistance above 60k 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.