Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC C0775: Low Tire Pressure System Sensors Not LearnedCircuit/System Description
The body control module (BCM) receives a radio frequency (RF) transmission from each tire pressure sensor. Each sensor RF transmission contains its own unique identification (ID) code that must be learned into the BCM memory. Once all 4 IDs have been learned and vehicle speed is 25 mph or greater, the BCM continuously compares IDs in received transmission to its learned IDs to determine if all 4 sensors are present.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The BCM has not undergone the tire pressure sensor learn procedure.
Action Taken When the DTC Sets
| • | The tire pressure monitor indicator icon on the instrument panel cluster (IPC) flashes for 1 minute and then remains illuminated after the ignition switch is cycled ON and the IPC bulb check is complete. |
| • | If equipped, the DIC displays a service tire monitor type message. |
Conditions for Clearing the DTC
A current DTC will clear when the BCM has undergone the sensor learn procedure.
Diagnostic Aids
A newly replaced BCM will set DTC C0775 on its initial ignition ON cycle. Tire pressure sensor learn procedure must be performed.
Reference Information
Description and Operation
Tire Pressure Monitor Description and Operation
Electrical Information Reference
| • | Circuit Testing |
| • | Wiring Repairs |
Scan Tool Reference
Control Module References for Scan Tool Information
Special Tools
J-46079 Tire Pressure Monitor Diagnostic Tool
Circuit/System Verification
Verify that the DTC C0775 is not set.
| ⇒ | If the DTC is set, program/setup the BCM. If the DTC resets, replace the BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
