Troubleshooting

-	the lamp check should occur and then all lamps / LED's should turn off.

-	If the lamp test does not occur :

• Check connectors and fuse/harnessing - open / short circuits. • Check DTC's. • If diagnostics cannot be entered, replace the receiver with a known good one (follow configuration & learning procedure).

-	Information to ascertain (TREAD Lamp) :

• Was puncture repair fluid used (it should not be)? - This can cause the sensor pressure port to block and incorrect warning to occur. • What temperature were tires last inflated at? At what temperature did warnings occur? - Pressure change is approx. 1.5psi / 10 C increase. • Have the tires been checked / inflated since the lamp first came on?

-	If the TREAD Lamp is on :

• Check for short circuits. • Enter Diagnostics and read TREAD Warnings Local Identifier Data. • Check to see if warning type is under inflation or leak. • If the warning is for under inflation, then: a. Re-inflate the wheel with the matching sensor ID to it's desired Placard pressure. b. Check to make sure that the TREAD lamp turns off (this may take up to 1 minutes if the tire is not rapidly re-inflated). • a. If the warning is for a leak, then: b. Fix any puncture and re-inflate the tire to the desired Placard pressure. Wait up to 1 minutes and make sure that the TREAD lamp turns off and the lamp does not turn on again. c. If lamp comes on again: d. Re-check pressure for signs of a puncture and Re-Check TREAD Warnings Local Identifier Data.

-	If the Placard pressure is OK and the TREAD lamp still does not turn off :

• Turn wheel a quarter turn and again wait 1 minutes (the sensor may be in an RF null). • If the lamp still does not turn off : check for loose receiver wiring and replace the receiver with a known good one if necessary (follow configuration & learning procedure). - If the problem still exists, replace sensor. - Ensure that all tires are inflated to their correct Placard pressures. - Clear TREAD warnings. - Test drive the vehicle and ensure that the TREAD lamp does not come back on.

-	Information to ascertain (DTC Lamp) :

• At what temperature did the DTC occur? Under certain conditions (approx.-40 C/F), a RF channel missing / hardware failure DTC may occur. This is due to the battery behavior.

-	DTC's should be retrieved by using Hi-Scan diagnostic tool.

-	The fault should then be diagnosed and rectified.

-	DTC's should then be cleared.

Diagnostic Trouble Codes (DTC)

DTC	Trouble Description
C1121	Sensor 1, Front Left Sensor Battery Voltage Low
C1122	Sensor 2, Front Right Sensor Battery Voltage Low
C1123	Sensor 3, Rear Left Sensor Battery Voltage Low
C1124	Sensor 4, Rear Right Sensor Battery Voltage Low
C1126	Vehicle Battery Voltage Low
C1127	Vehicle Battery Voltage High
C1212	Vehicle Speed Input Fault
C1301	Unmonitored Tire Installed
C1312	Left Front Sensor Radio Frequency channel Failure
C1313	Right Front Sensor Radio Frequency channel Failure
C1314	Left Rear Sensor Radio Frequency channel Failure
C1315	Rear Right Sensor Radio Frequency channel Failure
C1317	Front Left Sensor Wrong Type Install
C1318	Front Right Sensor Wrong Type Install
C1319	Rear Left Sensor Wrong Type Install
C1320	Rear Right Sensor Wrong Type Install
C1322	Left Front Sensor Over Temperature
C1323	Right Front Sensor Over Temperature
C1324	Left Rear Sensor Over Temperature
C1325	Right Rear Sensor Over Temperature
C1332	Left Front Sensor Fault
C1333	Right Front Sensor Fault
C1334	Sensor 3, Rear Left Sensor Battery Voltage Low
C1335	Right Rear Sensor Fault
C1661	Receiver EEPROM Failure
C1668	Internal failure detection
C2510	TREAD LAMP open/short circuit
C2511	Diagnostic(TPMS) Lamp Circuit Failure