Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, navigate to System Test and select the Coolant Three Way Valve Test.
  Did the Coolant Valve Three Way Valve Test pass or fail?
  
  Fail
  - Go To 2
  Pass
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE (F947) FUSED IGNITION RUN/START CIRCUIT
1. Turn the ignition off.
2. Disconnect the Coolant Three Way Valve harness connector.
3. Turn the ignition on, engine not running.
4. Measure the voltage of the (F947) Fused Ignition Run/Start circuit at the Coolant Three Way Valve harness connector.
  Is the voltage approximately equal to battery voltage?
  
  Yes
  - Go To 3
  No
  - Repair the (F947) Fused Ignition Run/Start circuit for a an open circuit or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (Z908) GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Measure the resistance between ground and the (Z908) Ground circuit at the Coolant Three Way Valve harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (Z908) Ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
COOLANT THREE WAY VALVE
1. Replace the Coolant Three Way Valve if no problems were found in the connector. After the Coolant Three Way Valve is replaced, navigate to Misc Functions, and select the Coolant Three Way Valve Replaced selection to clear the Coolant Three Way Valve actuation counter.
2. Turn the ignition on.
3. With the scan tool, navigate to System Test and select the Coolant Three Way Valve Test.
  Did the Coolant Valve Three Way Valve Test pass or fail?
  
  Pass
  - Repair is complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  Fail
  - Go To 5
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Coolant Three Way Valve and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Coolant Three Way Valve and Powertrain Control Module connectors.
4. Perform any Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace and program the Powertrain Control Module in accordance with the service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .