P0222

P0222-THROTTLE POSITION SENSOR 2 CIRCUIT LOW - 4.0L





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL


- When Monitored:
With the engine running and battery voltage greater than 10 volts.

- Set Condition:
The PCM detects that the sensor input voltage is below the minimum acceptable value.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview


Diagnostic Test


1. DTC IS ACTIVE

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

Start the engine and allow it to reach 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.

With the scan tool select View DTCs.

NOTE: If the DTC does not reset it may be necessary to test drive the vehicle.

Is the status Active for this DTC?

Yes


- Go to 2


No


- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.Checking For An Intermittent DTC


2. (K855) 5 VOLT SUPPLY CIRCUIT VOLTAGE




Turn the ignition off.
Disconnect the Throttle Body connector.
Turn the ignition on.
Measure the voltage of the (K855) 5 Volt Supply circuit in the Throttle Body harness connector.
Is the voltage above 4.5 volts?

Yes


- Go to 6


No


- Go to 3


3. (K855) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND




Turn the ignition on.
Disconnect the C2 Powertrain Control Module (PCM) harness connector.
Measure the resistance between ground and the (K855) 5 Volt Supply circuit in the Throttle Body harness connector.
Is the resistance above 1000 ohms?

Yes


- Go to 4


No


- Repair the short to ground in the (K855) 5 Volt Supply circuit.
- Perform the PCM Verification Test.Powertrain Verification Test


4. (K855) 5 VOLT SUPPLY CIRCUIT SHORTED TO THE (K922) TP SENSOR GROUND CIRCUIT




Measure the resistance between the (K855) 5 Volt Supply circuit and the (K922) TP Sensor Ground circuit in the Throttle Body harness connector.
Is the resistance above 100 ohms?

Yes


- Go to 5


No


- Repair the short between the (K855) 5 Volt Supply circuit and the (K922) TP Sensor Ground circuit.
- Perform the PCM Verification Test.Powertrain Verification Test


5. (K855) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE




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 (K855) 5 Volt Supply circuit between the Throttle Body harness connector and the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

Yes


- Go to 13


No


- Repair the open or excessive resistance in the (K855) 5 Volt Supply circuit.
- Perform the PCM Verification Test.Powertrain Verification Test


6. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO GROUND




Turn the ignition off.
Disconnect the C2 Powertrain Control Module (PCM) harness connector.
Measure the resistance between ground and the (K122) TP Signal 2 circuit in the Throttle Body harness connector.
Is the resistance above 100 ohms?

Yes


- Go to 7


No


- Repair the short to ground in the (K122) TP Signal 2 circuit.
- Perform the PCM Verification Test.Powertrain Verification Test


7. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K922) TP SENSOR GROUND CIRCUIT




Measure the resistance between the (K122) TP Signal 2 circuit and the (K922) TP Sensor Ground circuit in the Throttle Body harness connector.
Is the resistance above 100 ohms?

Yes


- Go to 8


No


- Repair the short between the (K122) TP Signal 2 circuit and the (K922) TP Sensor Ground circuit.
- Perform the PCM Verification Test.Powertrain Verification Test


8. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K126) ETC MOTOR (-) CIRCUIT




Measure the resistance between the (K122) TP Signal 2 circuit and the (K126) ETC Motor (-) in the Throttle Body harness connector.
Is the resistance below 100 ohms?

Yes


- Repair the short between the (K126) ETC Motor (-) circuit and the (K122) TP Signal 2 circuit.
- Perform the PCM Verification Test.Powertrain Verification Test


No


- Go to 9


9. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K124) ETC MOTOR (+) CIRCUIT




Measure the resistance between the (K122) TP Signal 2 circuit and the (K124) ETC Motor (+) in the Throttle Body harness connector.
Is the resistance below 100 ohms?

Yes


- Repair the short between the (K122) TP Signal 2 circuit and the (K124) ETC Motor (+) circuit.
- Perform the PCM Verification Test.Powertrain Verification Test


No


- Go to 10


10. (K122) TP SIGNAL 2 CIRCUIT OPEN




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 (K122) TP Signal 2 circuit between the Throttle Body harness connector and the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

Yes


- Go to 11


No


- Repair the open in the (K122) TP Signal 2 circuit.
- Perform the PCM Verification Test.Powertrain Verification Test


11. THROTTLE POSITION SENSOR 2 VOLTAGE




Turn the ignition off.
Connect the C2 Powertrain Control Module (PCM) connector.
Turn the ignition on.
With the scan tool, read the Throttle Position Sensor 2 voltage.

NOTE: The sensor voltage should be approximately 0.0 volts (plus or minus.1 volt) with the connector disconnected.

Turn the ignition off.
Connect a jumper wire between the (K122) TP Signal 2 circuit and the (K855) 5 Volt Supply circuit in the Throttle Body harness connector.
Turn the ignition on.
With a scan tool, read the Throttle Position Sensor 2 voltage.

NOTE: The sensor voltage should be approximately 5.0 volts (plus or minus.1 volt) with the jumper wire in place.

Does the scan tool display the voltage as described above?

Yes


- Go to 12
- Perform the PCM Verification Test.Powertrain Verification Test


No


- Go to 13


12. THROTTLE BODY
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body 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. Verify that there is good pin to terminal contact in the related connectors.
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


- Repair as necessary.
- Perform the PCM Verification Test.Powertrain Verification Test


No


- Replace and Throttle Body. Disconnect the battery prior to replacing the Throttle Body. With the scan tool, perform the ETC relearn function after replacement.
- Perform the PCM Verification Test.Powertrain Verification Test


13. POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body 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. Verify that there is good pin to terminal contact in the related connectors.
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


- Repair as necessary.
- Perform the PCM Verification Test.Powertrain Verification Test


No


- Replace and program the Powertrain Control Module (PCM).
- Perform the PCM Verification Test.Powertrain Verification Test