Diagnostic Procedure
INITIALIZATION FAULT SYMPTOM CHART
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 |
NOTE:
If the TPM indicator is illuminated, check for a low tire pressure condition. If the TPM indicator is flashing, check for DTC's.
NOTE:
The below test is to locate the Tire Pressure Sensor/Transmitter.
NOTE:
If the tires have been rotated, the Tire Pressure Sensor/Transmitters are no longer in sequence from the factory. Faults are linked to Sensor/Transmitter ID's.
NOTE:
You must determine which Tire Pressure Sensor/Transmitter has set the fault or alert before diagnosing the system correctly.
NOTE:
Set ALL tire pressures to recommended specifications and recheck for faults/alerts. The fault will set within two minutes when at 20 PSI.Starting with the left front wheel, deflate the tire down to 20 PSI and wait 2 minutes.If the TPMS fault was detected and associated to this Sensor/Transmitter, it would correspond to the left front Sensor/Transmitter.If the TPMS fault was detected and not associated to this Sensor/Transmitter, repeat the process until the faulty Sensor/Transmitter has been identified.
NOTE:
Once a fault/alert has set, it will establish the location of the Tire Pressure Sensors/Transmitter. Repeat steps until the applicable Tire Pressure Sensor/Transmitter has been located. Perform this procedure prior to Symptom diagnosis .ContinueGo To 2 |
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| 2 |
NOTE:
The DTC can be caused by many different factors and might not be a Sensor/Transmitter or SKREEM fault.
NOTE:
Interference from other elements will over power the Sensor/Transmitter RF frequency making erratic operation to the TPMS. Cycle the ignition switch from OFF to ON.With the DRBIII®, read DTC's.Does the DRBIII® display any TIRE SENSOR TRANSMIT FAILURE or INITIALIZATION FAULT DTC's?Yes --> Go To 4No --> Go To 3 |
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| 3 | Cycle the ignition switch from OFF to ON.
NOTE:
Correct all tire pressure to recommended specifications and wait 2 minutes. Drive the vehicle for 10 minutes at 20 mph (32km/h). The Sensors/transmitters will be in drive mode operation. With the DRBIII®, read DTC's. Does the DRBIII® display TIRE SENSOR LOW PRESSURE ALERT? Yes --> Check and adjust ALL tire pressures. Check connectors - Clean/repair as necessary. If OK, replace and program the Tire Pressure Sensor/Transmitter in accordance with the Service Information. Perform TIRE PRESSURE VERIFICATION TEST - VER 1 - SKREEM . No --> Go To 4 |
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| 4 |
NOTE:
Some environment factors can disrupt the RF frequency signal. Check for RF frequency concerns and aftermarket accessories that would compromise the RF frequency signal before diagnosing Sensor/Transmitter or SKREEM being the fault.
NOTE:
Review with the customer their environmental driving conditions within the first 10 minutes of driving. Are there environmental factors causing the RF frequency issue?Yes --> Test Complete.No --> Go To 5 |
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| 5 | Turn the ignition off. Replace the appropriate Tire Pressure Sensor/Transmitter in accordance with the service information. Drive the vehicle for 10 minutes at 20 mph (32km/h). The Sensors/transmitters will be in drive mode operation. With the DRBIII®, read DTC's. Does the DTC reset? Yes --> Check connectors - Clean/repair as necessary. Replace and program the SKREEM in accordance with the Service Information. Perform TIRE PRESSURE VERIFICATION TEST - VER 1 - SKREEM . No --> Test Complete. |
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