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. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE GENERATOR
1. Turn the ignition off.
2. Disconnect the Generator field harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Measure the resistance between the Generator field terminals at the Generator.
  Is the resistance between 0.5 and 15.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Replace the Generator in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK THE (K20) GENERATOR FIELD CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Disconnect the PCM C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
2. Measure the resistance between ground and the (K20) Generator Field Control circuit at the Generator field harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K20) Generator Field Control circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK THE (K20) GENERATOR FIELD CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance between of the (K20) Generator Field Control circuit between the Generator field harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (K20) Generator Field Control circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
POWERTRAIN CONTROL MODULE
1. Measure and record the voltage between battery positive circuit of the PCM harness connector and the battery negative circuits of the PCM harness connector.
2. Reconnect the PCM connectors.
3. Using the scan tool, read battery voltage.
4. Compare the voltage reading from the voltmeter with that of the scan tool.
  Are the readings within 3.0 Volts of each other?
  
  Yes
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
  No
  - Replace and program the Powertrain Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .