Diagnostic Test

1) SRV PWM FEEDBACK
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 can result in personal injury or death.

NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test.

With the scan tool, read the SRV PWM Feedback.

Is the SRV PWM Feedback greater than 97%?

Yes
1. Go to 2).
No
1. Refer to the *CHECKING FOR AN INTERMITTENT DTC .
2) SHORT RUNNER VALVE ASSEMBLY

Fig 1: Checking SRV Signal Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Short Runner Valve Assembly connector.

Connect a jumper wire between the (K900) Sensor Ground circuit and the (K235) SRV Signal circuit in the Short Runner Valve Assembly harness connector.

Turn the ignition on.

With the scan tool, read the SRV PWM Feedback.

NOTE: The SRV PWM Feedback should be less than 3% with the jumper wire in place.

Is the SRV PWM Feedback less than 3%?

Yes
1. Replace the Short Runner Valve Assembly in accordance with the Service Information.
2. Perform PCM VERIFICATION TEST .
No
1. Go to 3).
3) (F856) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE

Fig 2: Measuring Voltage Of 5-Volt Supply Circuit In Short Runner Valve Assembly Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Powertrain Control Module (PCM) connector.

Turn the ignition on.

Measure the voltage of the (F856) 5 Volt Supply circuit in the Short Runner Valve Assembly harness connector.

Is there any voltage present?

Yes
1. Repair the (F856) 5 Volt Supply circuit for a short to voltage.
2. Perform PCM VERIFICATION TEST .
No
1. Go to 4).
4) (K235) SRV SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 3: Measuring Voltage Of (K235) SRV Signal Circuit In Short Runner Valve Assembly Harness Connector
Courtesy of CHRYSLER LLC

Measure the voltage of the (K235) SRV Signal circuit in the Short Runner Valve Assembly harness connector.

Is there any voltage present?

Yes
1. Repair the (K235) SRV Signal circuit for a short to voltage.
2. Perform PCM VERIFICATION TEST .
No
1. Go to 5).
5) (K235) SRV SIGNAL CIRCUIT SHORTED TO THE (F856) 5 VOLT SUPPLY CIRCUIT

Fig 4: Measuring Resistance Between SRV Signal Circuit & 5-Volt Supply In Short Runner Valve Assembly Harness Connector
Courtesy of CHRYSLER LLC

Measure the resistance between the (K235) SRV Signal circuit and the (F856) 5 Volt Supply in the Short Runner Valve Assembly harness connector.

Is the resistance below 100 ohms?

Yes
1. Repair the (K235) SRV Signal circuit for a short to the (F856) 5 Volt Supply circuit.
2. Perform PCM VERIFICATION TEST .
No
1. Go to 6).
6) (K235) SRV SIGNAL CIRCUIT SHORTED TO GROUND

Fig 5: Measuring Resistance Between Ground And SRV Signal Circuit In Short Runner Valve Assembly Harness Connector
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (K235) SRV Signal circuit in the Short Runner Valve Assembly harness connector.

Is the resistance above 100 ohms?

Yes
1. Go to 7).
No
1. Repair the (K235) SRV Signal circuit for a short to ground.
2. Perform PCM VERIFICATION TEST .
7) (K235) SRV SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 6: Measuring Resistance Of SRV Signal Circuit Between The Short Runner Valve Assembly Harness Connector
Courtesy of CHRYSLER LLC

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 Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (K235) SRV Signal between the Short Runner Valve Assembly harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes
1. Go to 8).
No
1. Repair the (K235) SRV Signal for an open circuit or high resistance.
2. Perform PCM VERIFICATION TEST .
8) (K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Fig 7: Measuring Resistance Of Sensor Ground Circuit Between Short Runner Valve Assembly Harness Connector
Courtesy of CHRYSLER LLC

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 (K900) Sensor Ground circuit between the Short Runner Valve Assembly harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes
1. Go to 9).
No
1. Repair the (K900) Sensor Ground circuit for an open circuit or high resistance.
2. Perform PCM VERIFICATION TEST .
9) POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Short Runner Valve Assembly and the Powertrain Control Module (PCM).

Look for any chafed, pierced, pinched, or partially broken wires.

Look for broken, bent, pushed out or corroded terminals.

Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.

Look for the data to change or for the DTC to reset during the wiggle test.

Refer to any Technical Service Bulletins that may apply.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform PCM VERIFICATION TEST .
No
1. Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
2. Perform PCM VERIFICATION TEST .