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. Ignition on, engine not running.
2. With the scan tool, erase DTCs.
3. Start the engine and let idle for at least two minutes.
4. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (F344) SMART POWER RELAY OUTPUT CIRCUIT
1. Turn the ignition off.
2. Disconnect the MAF harness connector.
3. Turn the ignition on, engine not running.
  NOTE:
  Check connectors - Clean/repair as necessary.
4. Measure the voltage of the (F344) Smart Power Relay Output circuit at the MAF Sensor harness connector.
  Is the voltage equal to battery voltage?
  
  Yes
  - Go To 3.
  No
  - Repair the (F344) Smart Power Relay Output circuit for an open or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR THE (F344) SMART POWER RELAY OUTPUT CIRCUIT SHORTED TO THE (K916) RETURN CIRCUIT

Fig 1: MAF Sensor Connector Pin ID
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Measure the resistance between the (F344) Smart Power Relay Output circuit and (K916) Return circuit at the MAF Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (F344) Smart Power Relay Output circuit and (K916) Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK FOR THE (K157) MAF SENSOR SIGNAL CIRCUIT SHORTED TO THE (K916) RETURN CIRCUIT

Fig 2: Checking For MAF Sensor Signal Circuit Shorted To Return Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K157) MAF Sensor Signal circuit and (K916) Return circuit at the MAF Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K157) MAF Sensor Signal Signal circuit and (K916) Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 5.
CHECK THE (K157) MAF SENSOR SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 3: Checking MAF Sensor Signal Circuit For An Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K157) MAF Sensor Signal circuit between the MAF Sensor harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 6.
  No
  - Repair the (K157) MAF Sensor Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K157) MAF SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 4: MAF Sensor Connector Pin ID & Battery Negative Cable Connection
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (K157) MAF Sensor Signal circuit at the Mass Air Flow Sensor harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the (K157) MAF Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 7.
CHECK THE INTAKE SYSTEM
1. Visually inspect the Intake System for any restrictions.
2. Perform the INTAKE AIR PRESSURE TEST diagnostic procedure. Refer to Diagnosis and Testing , 6.7L .
  Were any leaks or restrictions found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 8.
CHECK THE EXHAUST SYSTEM
1. Visually inspect the Exhaust System for any restrictions.
2. Perform the CHECKING THE EXHAUST SYSTEM FOR LEAKS diagnostic procedure. Refer to Diagnosis and Testing , 6.7L .
  Were any leaks or restrictions found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 9.
CHECK THE MASS AIR FLOW SENSOR
1. Replace the MAF Sensor in accordance with the Service Information.
2. Reconnect the PCM C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Start the engine and allow it to idle for one minute.
6. With the scan tool, read DTCs.
  Does the DTC P0102 return?
  
  Yes
  - 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 .
  No
  - Test Complete.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .