P080A
DTC P080A
Circuit Description
The clutch pedal position (CPP) sensor is an input to the engine control module (ECM). The CPP sensor is a potentiometer type sensor with a 5-volt reference circuit, a common low reference circuit and an independent signal circuit. The ECM supplies the 5-volt reference to the CPP.
The CPP sensor has opposite functionally. With the pedal released the CPP signal switch should read above 4 volts. With the pedal fully depressed the CPP signal switch should read below 1 volt.
When the ECM detects a Not Learned condition of the CPP sensor, DTC P080A sets. DTC P080A is a Type B DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P080A Clutch Pedal Position Not Learned
Conditions for Running the DTC
^ Ignition voltage is greater than 9.0 volts.
^ Ignition ON, with the engine OFF or the engine operating.
Conditions for Setting the DTC
With the clutch pedal fully released, if the CPP switch detects greater than 4.7 volts or less than 3.25 volts then DTC P080A sets.
Action Taken When the DTC Sets
If equipped, the following actions occur:
First Failure:
1. The malfunction indicator lamp (MIL) is not turned ON.
2. DTC P080A is stored in memory as a Failed Last Test.
3. The Failure Record is stored.
Second Consecutive Drive Cycle with a Failure:
1. The MIL is turned ON.
2. DTC P080A is stored in memory as a history DTC.
3. The Freeze Frame data is stored.
4. The Failure Record is stored.
Second Non-Consecutive Drive Cycle with a Failure:
1. The MIL is not turned ON.
2. DTC P080A is stored in memory as a Failed Last Test.
3. The Failure Record is stored.
Conditions for Clearing the DTC
^ The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
^ The ECM turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
^ A Current and a Last Test Failed DTC clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Diagnostic Aids
Use the J 35616 GM-approved Terminal Test Kit for any test that requires probing the ECM harness connector or any component connector.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests for the current state of the CPP sensor.
