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 C2194: Engine Speed Signal PerformanceCircuit/System Description
The tire pressure control module receives a engine speed signal from the IPC.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
Engine speed signal circuit malfunction.
Action Taken When the DTC Sets
The Tire Pressure Warning Light is illuminated.
Conditions for Clearing the DTC
Engine speed is greater than 1000 RPM for 3 seconds.
Reference Information
Description and Operation
Tire Pressure Monitor Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Testing
- Disconnect the harness connector at the Tire Pressure Control Module.
- Disconnect the harness connector at the Engine Control Module.
- Test for less than 1 ohm of resistance between the engine speed signal circuit terminal 4 and terminal 5.
- Test for infinite resistance between the engine speed signal circuit terminal 4 and ground.
| ⇒ | If greater than the specified value, test the engine speed signal circuit for an open/high resistance. |
| ⇒ | If not the specified value, test engine 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 after completing the diagnostic procedure.
| • | Control Module References for replacement, setup, and programming |
