Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Caliber. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Start the engine.
2. Allow the engine to reach normal operating temperature.
  NOTE: Diagnose and repair any system voltage or sensor reference voltage DTCs before continuing with this test.
  
  NOTE: It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set.
3. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go to step 2
  No
  - Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
(F856) 5 VOLT SUPPLY CIRCUIT VOLTAGE

Fig 1: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Vehicle Speed Sensor connector.
3. Turn the ignition on.
4. Measure the voltage of the (F856) 5 Volt Supply circuit in the Vehicle Speed Sensor harness connector.
  Is the voltage between 4.5 and 5.5 volts?
  
  Yes
  - Go to step 3
  No
  - Go to step 7
(K75) VEHICLE SPEED SIGNAL CIRCUIT VOLTAGE

Fig 2: Checking Vehicle Speed Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (K75) Vehicle Speed Signal circuit in the Vehicle Speed Sensor harness connector.
  Is the voltage between 4.5 and 5.5 volts?
  
  Yes
  - Go to step 4
  No
  - Go to step 11
(K914) SENSOR GROUND CIRCUIT TEST
1. Turn the ignition off.
2. Using a 12 volt test light connected to 12 volts, check the (K914) Sensor Ground circuit in the Vehicle Speed Sensor harness connector.
  NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
  
  Is the test light illuminated and bright?
  
  Yes
  - Go to step 5
  No
  - Go to step 15
(F856) 5 VOLT SUPPLY CIRCUIT SHORTED TO THE (K75) VEHICLE SPEED SIGNAL CIRCUIT

Fig 3: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Measure the resistance between the (F856) 5 Volt Supply circuit and the (K75) Vehicle Speed Signal circuit in the Vehicle Speed Sensor harness connector.
  Is the resistance above 100 ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the (F856) 5 Volt Supply circuit for a short to the (K75) Vehicle Speed Signal circuit.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
VEHICLE SPEED SENSOR
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Vehicle Speed 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.
4. Inspect the Vehicle Speed Sensor for any condition that would result in an incorrect signal, such as damage, corrosion, or contamination.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace the Vehicle Speed Sensor.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(F856) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE

Fig 4: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Turn the ignition on.
4. Measure the voltage of the (F856) 5 Volt Supply circuit in the Vehicle Speed Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (F856) 5 Volt Supply circuit for a short to voltage.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 8
(F856) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Fig 5: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (F856) 5 Volt Supply circuit in the Vehicle Speed Sensor harness connector.
  Is the resistance above 100 ohms?
  
  Yes
  - Go to step 9
  No
  - Repair the (F856) 5 Volt Supply circuit for a short to ground.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(F856) 5 VOLT SUPPLY CIRCUIT SHORTED TO THE (K914) SENSOR GROUND CIRCUIT

Fig 6: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (F856) 5 Volt Supply circuit and the (K914) Sensor Ground circuit in the Vehicle Speed Sensor harness connector.
  Is the resistance above 100 ohms?
  
  Yes
  - Go to step 10
  No
  - Repair the (F856) 5 Volt Supply circuit for a short to the (K914) Sensor Ground circuit.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(F856) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

Fig 7: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (F856) 5 Volt Supply circuit between the Vehicle Speed Sensor harness connector and the Powertrain Control Module (PCM) harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 16
  No
  - Repair the (F856) 5 Volt Supply circuit for an open circuit or high resistance.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K75) VEHICLE SPEED SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 8: Checking Vehicle Speed Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Turn the ignition on.
4. Measure the voltage of the (K75) Vehicle Speed Signal circuit in the Vehicle Speed Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K75) Vehicle Speed Signal circuit for a short to voltage.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 12
(K75) VEHICLE SPEED SIGNAL CIRCUIT SHORTED TO GROUND

Fig 9: Checking Vehicle Speed Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (K75) Vehicle Speed Signal circuit in the Vehicle Speed Sensor harness connector.
  Is the resistance above 100 ohms?
  
  Yes
  - Go to step 13
  No
  - Repair the (K75) Vehicle Speed Signal circuit for a short to ground.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K75) VEHICLE SPEED SIGNAL CIRCUIT SHORTED TO (K914) SENSOR GROUND CIRCUIT

Fig 10: Checking Vehicle Speed Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K75) Vehicle Speed Signal circuit and the (K914) Sensor Ground circuit in the Vehicle Speed Sensor harness connector.
  Is the resistance above 100 ohms?
  
  Yes
  - Go to step 14
  No
  - Repair the (K75) Vehicle Speed Signal circuit for a short to the (K914) Sensor Ground circuit.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K75) VEHICLE SPEED SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 11: Checking Vehicle Speed Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K75) Vehicle Speed Signal circuit between the Vehicle Speed Sensor harness connector and the Powertrain Control Module (PCM) harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 16
  No
  - Repair the (K75) Vehicle Speed Signal circuit for an open circuit or high resistance.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K914) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Fig 12: Checking Vehicle Speed Ground Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Measure the resistance of the (K914) Sensor Ground circuit between the Vehicle Speed Sensor harness connector and the Powertrain Control Module (PCM) harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 16
  No
  - Repair the circuit for an open circuit or high resistance.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Vehicle Speed 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.
4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Refer to any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .