C1501

.C1501-TIRE PRESSURE SENSOR 1 INTERNAL





Theory of Operation
The tire pressure sensor actively monitors the air pressure and air temperature inside the tire, the sensor internal battery status, and the radial acceleration of the wheel. Each sensor has a unique ID code. The sensor transmits the data at regular intervals via an encoded signal to a receiver circuit located in the Wireless Control Module (SKREEM).
^ When Monitored:
With vehicle speed greater than 15 m.p.h. (24 km/h).
^ Set Condition:
The WCM (SKREEM) will monitor the signals from the four active road tire sensors. A loss of signal error is detected when eight consecutive blocks of data are not received or cannot be accurately decoded. An internal sensor hardware error condition will be set when an error in the accelerometer, pressure sensor, or temperature sensor is detected.

Possible Causes
- INTERMITTENT TIRE PRESSURE SENSOR INTERNAL DTC
- TIRE PRESSURE SENSOR
- WIRELESS CONTROL MODULE (SKREEM)

Diagnostic Test
1. DTC STATUS IS ACTIVE
Turn the ignition on.
With the scan tool, select View DTC's in the Wireless Control Module (SKREEM).
Is the DTC status Active at this time?
YES >>Go to 2
NO >>Go to 4

2. TIRE PRESSURE SENSOR
Turn the ignition off.
Replace the Tire Pressure Sensor.
With the scan tool, clear DTC's in the Wireless Control Module (SKREEM).
Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h.
With the scan tool, select View DTC's in the Wireless Control Module (SKREEM).
Does the DTC reset or is the status Active for this DTC?
YES >>Go to 3.
NO >>Test Complete.

3. WIRELESS CONTROL MODULE (SKREEM)
View repair.
Repair
Replace the Wireless Control Module (SKREEM). Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test

4. INTERMITTENT TIRE PRESSURE SENSOR 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 DTC's in the Wireless Control Module (SKREEM).
Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h.
With the scan tool, select View DTC's in the Wireless Control Module (SKREEM).
Does the DTC reset or is the status Active for this DTC?
YES >>Return to the beginning of this test and perform the diagnostic procedure as necessary. Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test
NO >>Test complete.