Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
1. Start the engine and allow it to reach normal operating temperature.
  WARNING:
  When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
  
  NOTE:
  Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test.
2. With the scan tool, select View DTCs.
  Is the DTC Active at this time
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
MAP SENSOR

Fig 1: MAP Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the MAP Sensor harness connector.
3. Connect a jumper wire between the (K1) MAP Signal circuit and the (K900) Sensor ground circuit in the Sensor harness connector.
4. Ignition on, engine not running.
5. With the scan tool, monitor the MAP Sensor voltage.
  NOTE:
  The sensor voltage should be approximately 0 volts with the jumper wire in place.
  
  Does the scan tool display the voltage as described above?
  
  Yes
  - Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors. Replace the MAP Sensor if no issues were found with the connectors. Refer to SENSOR, Manifold Air Pressure (MAP) , Removal .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3.
    NOTE:
    Remove the jumper wire before continuing.
(K1) MAP SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 2: Measuring Voltage On (K1) MAP Signal Circuit In MAP Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the C1 and C2 PCM harness connectors.
3. Ignition on, engine not running.
4. Measure the voltage on the (K1) MAP Signal circuit in the MAP Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (K1) MAP Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4.
(K1) MAP SIGNAL CIRCUIT OPEN

Fig 3: Measuring Resistance Of MAP Sensor Signal Circuit Between Harness Connector And Appropriate Terminal Of Special Tool #8815
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
  CAUTION:
  Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the PCM Pinout Box (special tool #8815A, Kit, NGC, 38 Position) to perform diagnosis.
2. Measure the resistance of the (K1) MAP Signal circuit from the MAP Sensor harness connector to the appropriate terminal of PCM Pinout Box (special tool #8815A, Kit, NGC, 38 Position).
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 5.
  No
  - Repair the open in the (K1) MAP Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
(K1) MAP SIGNAL CIRCUIT SHORTED TO THE (F856) 5 VOLT SUPPLY CIRCUIT

Fig 4: Measuring Resistance Between (K1) MAP Signal Circuit And (F856) 5-volt Supply Circuit In MAP Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K1) MAP Signal circuit and the (F856) 5 Volt Supply circuit in the MAP Sensor harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the short between the (F856) 5 Volt Supply circuit and the (K1) MAP Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6.
(K900) SENSOR GROUND CIRCUIT OPEN

Fig 5: Measuring Resistance Of (K900) Sensor Ground Circuit From MAP Sensor Harness Connector To Appropriate Terminal Of Special Tool #8815
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K900) Sensor ground circuit from the MAP Sensor harness connector to the appropriate terminal of PCM Pinout Box (special tool #8815A, Kit, NGC, 38 Position).
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 7.
  No
  - Repair the open in the (K900) Sensor ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the MAP Sensor 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 Sensor and 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 POWERTRAIN VERIFICATION TEST .
  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 POWERTRAIN VERIFICATION TEST .