Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. 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 at this time?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
WATER IN FUEL SENSOR
1. Turn the ignition off.
2. Disconnect the Water in Fuel Sensor.
3. Turn the ignition on.
4. Using a scan tool monitor the Water in Fuel Sensor voltage.
5. Connect a jumper wire between the (G123) WIF Signal circuit and the (K914) Sensor ground circuit.
  Did the voltage display 5.0 Volts with the connector disconnected and drop close to 0 Volts when the jumper wire was installed?
  
  Yes
  - Replace the Water in Fuel Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CHECK THE (G123) WATER IN FUEL SENSOR FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the C1 PCM harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (G123) WIF Signal circuit at the Water in Fuel Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (G123) WIF Signal circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE (G123) WIF SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Measure the resistance on the (G123) WIF Signal circuit from the Water in Fuel Sensor harness connector to the C1 PCM harness connector.
  Is the resistance greater than 5.0 Ohms?
  
  Yes
  - Repair the (G123) WIF Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 5.
CHECK THE (K914) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance on the (K914) Sensor ground circuit from the Water in Fuel Sensor harness connector to the C1 PCM harness connector.
  Is the resistance greater than 5.0 Ohms?
  
  Yes
  - Repair the (K914) Sensor ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Replace the Powertrain Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .