C150D-RIGHT REAR TIRE PRESSURE TRIGGER MODULE VOLTAGE HIGH
For a complete wiring diagram Refer to Section 8W
Theory of Operation
The Tire Pressure Trigger Module is used to automatically learn the location of each wheel sensor on the vehicle. The module is controlled and activated in sequence by the Wireless Control Module (SKREEM) over a LIN bus. When activated, the module will generate a 125 KHz signal of sufficient field strength to trigger the tire pressure sensor and force a RF transmission from the sensor.
- When Monitored:
Continuously.
- Set Condition:
The WCM receives a message from the Tire Pressure Trigger Module indicating that an over voltage condition has been detected.
| Possible Causes |
| INTERMITTENT TIRE PRESSURE TRIGGER MODULE PERFORMANCE DTC |
| (F202) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE |
| (Z965) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE |
| TIRE PRESSURE TRIGGER MODULE |
| WIRELESS CONTROL MODULE (SKREEM) |
Diagnostic Test
1. DTC STATUS IS ACTIVENOTE: If the incorrect Placard Values were programmed into the WCM/SKREEM, a DTC could be set. Before continuing with any TPM diagnostic test, using the scan tool, check that the correct Placard Values have been programmed in to the module.
Turn the ignition on.
NOTE: If a system or battery voltage high DTC is set in the Wireless Control Module (SKREEM) or in the PCM, repair the voltage DTC before continuing with this test.
With the scan tool, select View DTCs in the Wireless Control Module (SKREEM).
Is the DTC status Active at this time?
Yes
- Go to 2
No
- Go to 6
2. (F202) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE
Turn the ignition on.
Using a 12–volt test light connect to ground, check the (F202) 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 3
No
- Repair the (F202) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance.
- Perform TPM VERIFICATION TEST. (Refer to 22 - TIRES/WHEELS/TIRE PRESSURE MONITORING - STANDARD PROCEDURE)
3. (Z965) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
Using a 12–volt test light connect to 12 volts, check each of the (Z965) Ground circuit(s).
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 (Z965) Ground circuit(s) for an open circuit or high resistance.
- Perform TPM VERIFICATION TEST. (Refer to 22 - TIRES/WHEELS/TIRE PRESSURE MONITORING - STANDARD PROCEDURE)
4. TIRE PRESSURE TRIGGER MODULE
Turn the ignition off.
Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information.
With the scan tool, clear DTCs in the Wireless Control Module (SKREEM).
Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h).
With the scan tool, select View DTCs in the Wireless Control Module (SKREEM).
Does the DTC reset or is the status Active for this DTC?
Yes
- Go to 5
No
- Test Complete.
- Perform TPM VERIFICATION TEST. (Refer to 22 - TIRES/WHEELS/TIRE PRESSURE MONITORING - STANDARD PROCEDURE)
5. WIRELESS CONTROL MODULE (SKREEM)
View repair.
Repair
- Replace the Wireless Control Module (SKREEM) in accordance with the Service Information.
- Perform TPM VERIFICATION TEST. (Refer to 22 - TIRES/WHEELS/TIRE PRESSURE MONITORING - STANDARD PROCEDURE)
6. INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC
The conditions necessary to set this DTC are not present at this time.
Refer to any Technical Service Bulletins that may apply to this condition.
With the scan tool, clear DTCs in the Wireless Control Module (SKREEM).
Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 MPH (24 km/h).
With the scan tool, select View DTCs in the Wireless Control Module (SKREEM).
Does the DTC reset or is the status Active for this DTC?
Yes
- Return to the first step of this test and perform the diagnostic procedure.
No
- Test complete.
- Perform TPM VERIFICATION TEST. (Refer to 22 - TIRES/WHEELS/TIRE PRESSURE MONITORING - STANDARD PROCEDURE)