For 1990-2009 cars only
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 C2173: Engine Speed Signal or Vehicle Speed Signal PerformanceCircuit/System Description
The tire pressure control module receives a vehicle speed signal from the IPC and an engine speed signal from the PCM. The tire pressure control module utilizes these signals to detect DTCs C2121-C2124 and C2177.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
| • | No engine speed signal while vehicle speed is greater than 5 mph for 15 minutes. |
| • | No vehicle speed signal while engine speed is a specified value for 15 minutes. |
Action Taken When the DTC Sets
The Tire Pressure Warning Light is illuminated.
Conditions for Clearing the DTC
The condition responsible for setting the DTC no longer exists.
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
Circuit/System Testing
- With the scan tool, place the system in Test Mode and enter signal check mode.
- Start the engine and increase the speed to 1000 RPM for 3 seconds or more to erase DTC C2194, then drive the vehicle at 12 mph or more for 10 seconds to erase DTC C2191.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for module replacement, setup, and programming |
