Diagnostic Test

1) TIP SENSOR VOLTAGE BELOW .078 VOLTS
Start the engine.

With the scan tool, read the TIP Sensor voltage.

Is the voltage below .078 of a volt?

Yes
1. Go to 2).
No
1. Refer to the INTERMITTENT CONDITION symptom in the Driveability information. Refer to INTERMITTENT CONDITION .
2. Perform POWERTRAIN VERIFICATION TEST .
2) (F856) 5 VOLT SUPPLY CIRCUIT

Fig 1: Measuring For Voltage At 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the TIP Sensor harness connector.

Ignition on, engine not running.

Measure the voltage of the (F856) 5 Volt Supply circuit in the TIP Sensor harness connector.

Is the voltage between 4.5 to 5.2 volts?

Yes
1. Go to 3).
No
1. Go to 6).
3) TIP SENSOR INTERNAL FAILURE
With the harness connect disconnected.

Monitor the TIP Sensor voltage on the scan tool.

Is the voltage between 4.5 and 5.2 volts?

Yes
1. Replace the TIP Sensor.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 4).
4) (K153) TIP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

Fig 2: Measuring Resistance Between Ground & TIP Sensor Signal Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the PCM harness connector.

Measure the resistance between the (K153) TIP Sensor signal circuit at the TIP Sensor harness connector and ground.

Is the resistance below 100 ohms?

Yes
1. Repair the short to ground in the (K153) TIP Sensor signal circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 5).
5) (K153) TIP SENSOR SIGNAL CIRCUIT SHORTED TO (K914) SENSOR GROUND CIRCUIT

Fig 3: Measuring Resistance Between TIP Sensor Signal & Ground Circuits
Courtesy of CHRYSLER LLC

Measure the resistance between the (K153) TIP Sensor signal circuit and the (K914) Sensor ground circuit in the TIP Sensor harness connector.

Is the resistance below 100 ohms?

Yes
1. Repair the (K153) TIP Sensor signal circuit for a short to the (K914) Sensor ground circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 9).
6) (F856) 5 VOLT SUPPLY CIRCUIT OPEN

Fig 4: Measuring Resistance Of 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the PCM harness connector.

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 Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (F856) 5 Volt Supply circuit from the TIP Sensor harness connector to the appropriate terminal of special tool #8815.

Is the resistance below 100 ohms?

Yes
1. Go to 7).
No
1. Repair the open (F856) 5 Volt Supply circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
7) (F856) 5 VOLT SUPPLY CIRCUIT SHORT TO GROUND

Fig 5: Measuring Resistance Between 5-Volt Supply Circuit & Ground
Courtesy of CHRYSLER LLC

Measure the resistance between the (F856) 5 Volt Supply circuit in the TIP Sensor harness connector and ground.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (F856) 5 Volt Supply circuit for a short to ground.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 8).
8) (F856) 5 VOLT SUPPLY CIRCUIT SHORT TO (K914) SENSOR GROUND

Fig 6: Measuring Resistance Between 5-Volt Supply Circuit & Sensor Ground Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between the (F856) 5 Volt Supply circuit and the (K914) Sensor Ground circuit in the TIP Sensor harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (F856) 5 Volt Supply circuit for a short to the (K914) Sensor Ground circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 9).
9) PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.

If there are no possible causes remaining, view repair.

Repair
1. Replace and program the Powertrain Control Module in accordance with the Service Information.
2. Perform POWERTRAIN VERIFICATION TEST .