C151D
C151D-TIRE PRESSURE MONITORING (TPM) SENSOR LOCATION UNDETERMINED
For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.
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. If vehicle sensor locate process fails the warning light will flash for 75 seconds than stay on.
- When Monitored:
During vehicle sensor locate process.
- Set Condition:
Must fail vehicle sensor locate process one time.
NOTE: The TPM Transponders are commonly known as Trigger Modules. For correct locations of the TPM Transponders, use the service information as a guide.
1. VERIFY DTC IS ACTIVE
NOTE: Before continuing with this test, perform the appropriate diagnostic procedure for all other DTCs first.
NOTE: Before continuing with this diagnostic procedure, verify the harness is not damaged to the WCM and or the TPM Transponders.
1. Ignition on, engine not running.
2. With the scan tool, read and record DTCs.
3. With the scan tool, erase DTCs.
4. Cycle the ignition switch.
5. With the scan tool, read DTCs.
Is the DTC status Active at this time?
Yes
- Go To 2
No
- Go To 9
2. TIRE PRESSURE MONITORING (TPM) TRANSPONDERS
NOTE: For the proper locations of the TPM Transponders, refer to service information.
1. Turn the ignition off to the lock position.
2. Disconnect the two TPM Transponder harness connectors.
3. Ignition on, engine not running.
4. With a voltmeter measure the voltage between the (F504) Fused Ignition Switch Output (Run) circuit and the (Z924) Ground circuits at each of the two TPM Transponder harness connectors.
Was the voltage within battery voltage (±1 Volt) at each of the TPM Transponders?
Yes
- Go To 8
No
- Go To 3
3. (F504) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
1. Using a 12-volt test light connect to ground, check the (F504) Fused Ignition Switch Output (Run) circuit at the TPM Transponder harness connectors.
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 4
No
- Repair the (F504) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance.
- Perform the TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test.
4. (Z924) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
1. Turn the ignition off to the lock position.
2. Using a 12-volt test light connect to battery voltage, check each of the (Z924) 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 5
No
- Repair the (Z924) Ground circuit(s) for an open circuit or high resistance.
- Perform the TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test.
5. (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORTED TO VOLTAGE
1. Disconnect the WCM harness connectors.
2. Ignition on, engine not running.
3. Measure the voltage between ground and the (D508) COM - LIN Tire Pressure Monitor LAN circuit at the TPM Transponder harness connectors.
Is there any voltage present?
Yes
- Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to voltage.
- Perform the TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test.
No
- Go To 6
6. (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORTED TO GROUND
1. Turn the ignition off to the lock position.
2. Measure the resistance between ground and the (D508) COM - LIN Tire Pressure Monitor LAN circuit at the TPM Transponder harness connectors.
Is the resistance below 5.0 Ohms?
Yes
- Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to ground.
- Perform the TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test.
No
- Go To 7
7. (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (D508) COM-LIN Tire Pressure Monitor LAN circuit between the TPM Transponder harness connectors and the WCM harness connectors.
Is the resistance below 5.0 Ohms?
Yes
- Go To 8
No
- Repair the (D508) COM-LIN Tire Pressure Monitor LAN circuit for an open.
- Perform the TPM VERIFICATION. Tire Pressure Monitor (TPM) Verification Test.
8. CHECK FOR ADDITIONAL TIRE PRESSURE MONITORING (TPM) TRANSPONDER COMMUNICATION RELATED DTCs
1. 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 the Wireless Control Module (WCM).
- Perform the WCM VERIFICATION TEST. Wireless Control Module (WCM) Verification Test.
No
- Replace the Tire Pressure Monitoring (TPM) Transponder.
- Perform the TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test.
9. INTERMITTENT TIRE PRESSURE MONITORING (TPM) TRANSPONDER DTC
NOTE: The conditions that set the DTC are not present at this time. The following list may help in identifying the intermittent condition.
1. Check for Technical Service Bulletins (TSBs) for any causes that may apply.
2. Review the scan tool Environmental Data (EV Data). If possible, try to duplicate the conditions under which the DTC set.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
4. If numerous DTCs were set, use a wiring diagram/schematic and look for any common ground or power supply circuits.
5. Turn the ignition off to the lock position.
6. Using the wiring diagram/schematic as a guide, inspect the related wire harness. Disconnect all the related harness connectors. Look for any chafed, pierced, pinched, partially broken wires and broken, bent, pushed out, or corroded terminals.
Were any problems found?
Yes
- Perform the necessary repairs.
- Perform the TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test.
No
- Test complete.