Inspection And Verification

Verify the customer concern by inspecting the vehicle and observing the message center (if equipped), and the TPMS indicator.

NOTE: If the tire pressure is adjusted to the cold placard pressure, the TPMS light may not immediately turn off. For additional information, Go To PINPOINT TEST F .

Inspect to determine if one of the following mechanical or electrical concerns apply:

Visual Inspection Chart

VISUAL INSPECTION CHART

Mechanical	Electrical
Tire pressure Non-OEM wheels installed (aftermarket rims) TPMS sensor damaged or missing Spare tire installed as a road wheel	Battery junction box (BJB): fuse(s) 2 (10A), 15 (5A) Connectors or connections Ground integrity Harness routing Wire chafing Circuitry open/shorted TPMS module missing or damaged

If the inspection reveals an obvious concern(s) that can be readily identified, repair as required.
If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
- check the connections to the vehicle.
- check the ignition switch position.
- verify that the battery voltage is between 10 and 16 volts. Refer to BATTERY LOAD TEST .
If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
Carry out the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with:
- CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to MODULE COMMUNICATIONS NETWORK .
- SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the TPMS module.
If the DTCs retrieved are related to the concern, refer to TIRE PRESSURE MONITOR SYSTEM (TPMS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX to continue diagnostics.
If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART to continue diagnostics.

TIRE PRESSURE MONITOR SYSTEM (TPMS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC	Description	Source	Action
B1342	ECU is Defective	TPMS Module	INSTALL a new tire pressure monitor module. REFER to TIRE PRESSURE MONITORING SYSTEM MODULE .
B2477	Module Configuration Failure / Mismatch	TPMS Module	RFFFR to MODULE COMMUNICATIONS NETWORK .
B2849	Horn Output Relay Circuit Open	TPMS Module	Go To PINPOINT TEST D .
B2868	Left Front Tire Pressure Sensor Fault	TPMS Module	The module has not heard this sensor during the TPMS module removal and installation process. When programming or installing a new TPMS module, the tire pressure sensors must be manually trained. REFER to TIRE PRESSURE MONITORING SYSTEM MODULE .
B2869	Right Front Tire Pressure Sensor Fault	TPMS Module	The module has not heard this sensor during the TPMS module removal and installation process. When programming or installing a new TPMS module, the tire pressure sensors must be manually trained. REFER to TIRE PRESSURE MONITORING SYSTEM MODULE .
B2870	Right Rear Tire Pressure Sensor Fault	TPMS Module	The module has not heard this sensor during the TPMS module removal and installation process. When programming or installing a new TPMS module, the tire pressure sensors must be manually trained. REFER to TIRE PRESSURE MONITORING SYSTEM MODULE .
B2871	Left Rear Tire Pressure Sensor Fault	TPMS Module	The module has not heard this sensor during the TPMS module removal and installation process. When programming or installing a new TPMS module, the tire pressure sensors must be manually trained. REFER to TIRE PRESSURE MONITORING SYSTEM MODULE .
B2872	Tire Pressure Sensor Fault	TPMS Module	Go To PINPOINT TEST E .
C2780	ECU in Manufacturing Mode	TPMS Module	The TPMS module is in manufacturing mode and must undergo the removal and installation process. REFER to the steps in TIRE PRESSURE MONITORING SYSTEM MODULE .
U1041	SCP Invalid or Missing Data for Vehicle Speed	SCP	REFER to MODULE COMMUNICATIONS NETWORK .
U1262	SCP Communication Bus Fault	SCP	REFER to Section MODULE COMMUNICATIONS NETWORK .