C2191

DTC C2191

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.

DTC Descriptor
DTC C2191
- Vehicle Speed Signal Performance

Circuit/System Description

The tire pressure control module receives a vehicle speed signal from the IPC.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

Vehicle speed signal circuit malfunction.

Action Taken When the DTC Sets

The Tire Pressure Warning Light is illuminated.

Conditions for Clearing the DTC

Vehicle speed is greater than 12 mph for 3 seconds.

Reference Information
Description and Operation

Tire Pressure Monitor Description and Operation (Description and Operation)
Schematic Reference

Tire Pressure Monitoring System Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning)for Scan Tool Information


Circuit/System Testing

1. Disconnect the harness connector at the Tire Pressure Control Module.
2. Disconnect the harness connector at the IPC.
3. Test for less than 1 ohm of resistance between the vehicle speed signal circuit terminal 2 and terminal 17.

• If greater than the specified value, test the vehicle speed signal circuit for an open/high resistance.

4. Test for infinite resistance between the vehicle speed signal circuit terminal 2 and ground.

• If not the specified value, test vehicle speed signal circuit for a short to ground, if circuit tests normal replace the tire pressure control module.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Tire Pressure Indicator Sensor Learn (Testing and Inspection)
* Control Module References (Programming and Relearning)for replacement, setup, and programming