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C151D







C151D-TIRE PRESSURE SENSOR LOCATION UNDETERMINED

For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

The vehicle sensor locate process occurs after the vehicle sits at zero speed for more than 19 min. The tire pressure monitor system will determine the sensor positions while driving at speeds above 15 MPH (24 Km/h). This process can take up to 10 min. to determine sensor positions.

- When Monitored:
During vehicle sensor locate process.

- Set Condition:
Must fail vehicle sensor locate process 3 times in a row.





Diagnostic Test

1. OTHER DTC'S SET
Repair all other DTC's first.
Is this DTC still active after all other DTC's repaired?

Yes

- Go to 2

No

- Test Complete.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

2. VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

Turn the ignition on.
With the scan tool, read and record WCM DTCs.
With the scan tool, erase WCM DTCs.
Cycle the ignition switch.
With the scan tool, read WCM DTCs.
Does this DTC reset?

Yes

- Go to 3

No

- Perform the Stored Lost Communication test procedure. Stored Lost Communication DTCs.
- Perform BODY VERIFICATION TEST. Body Verification Test.

3. (D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN
Turn the ignition off.
Disconnect the Tire Pressure Trigger Module.
Disconnect the WCM.
With an ohmmeter measure the resistance of the (D508) COM-LIN TIRE PRESSURE MONITOR LAN CIRCUIT.
Is the resistance below 5 Ohms?

Yes

- Go to 4

No

- Repair or replace the open circuit.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

4. FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE




Turn the ignition off.
Disconnect the Tire Pressure Transponder harness connector.
Disconnect the Sentry Key Remote Entry Module harness connector.
Turn the ignition on.
Using a 12-volt test light connect to ground, check the Fused Ignition Switch Output (Run) circuit.

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 5

No

- Repair the Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

5. GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE




Using a 12-volt test light connect to battery voltage, probe each of the Ground circuit(s).

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

- Go to 6

No

- Repair the Ground circuit(s) for an open circuit or high resistance.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

6. (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE




Turn the ignition on.
Measure the voltage of the (D508) COM - LIN Tire Pressure Monitor LAN circuit.
Is there any voltage present?

Yes

- Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to voltage.

No

- Go to 7
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

7. (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND




Turn the ignition off.
Measure the resistance between ground and the (D508) COM - LIN Tire Pressure Monitor LAN circuit.
Is the resistance below 5.0 ohms?

Yes

- Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to ground.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

No

- Go to 8

8. (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH RESISTANCE




Use a jumper wire with one end connected to ground and the other to the (D508) COM - LIN Tire Pressure Monitor LAN circuit in the Front Left Pressure Tire Transponder harness connector.
Using a 12-Volt test light connected to battery voltage, probe the (D508) COM - LIN Tire Pressure Monitor LAN circuit in the TPM harness connector.

NOTE: The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test light illuminate bright?

Yes

- Go to 9

No

- Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for an open circuit or high resistance.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

9. POWER AND GROUND CIRCUIT OPEN
Turn the ignition on.
With a voltmeter measure the voltage between the power and ground circuit at the Trigger Module.
Is the voltage at least the same as battery voltage?

Yes

- Go to 10

No

- Repair the open circuit.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

10. CHECK FOR ADDITIONAL TRIGGER MODULE COMMUNICATION RELATED DTCs
With the scan tool, select Network View and select Advanced.
Is there more than one module with active DTCs "Logged Against" the WCM?

Yes

- Replace/update the WCM.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

No

- Replace the Tire pressure trigger Module.
- Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

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