P1375

Circuit Description

This diagnostic test checks for 24X signal at a logic high condition. The fault could be induced by the failure of either Crankshaft Position A or B Sensor input signal to the Ignition Control Module. Under such a condition, the Ignition Control Module would force the 24X signal high. This DTC will also set if the 24X signal is shorted to voltage externally. If either condition is met DTC P1375 is set.

Conditions for Running the DTC

^ DTC P1376 is not set.
^ Engine speed greater than 496 RPM.
^ At least 7 CAM pulses received since key ON.

Conditions for Setting the DTC

24X signal voltage is high and no 24X reference pulses have been received during the last 8 4X reference pulses.

Action Taken When the DTC Sets

^ The PCM will illuminate the Malfunction Indicator Lamp (MIL) when the diagnostic runs and fails.
^ The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records.

Conditions for Clearing the MIL/DTC

^ The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.
^ A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.
^ A History DTC will clear after forty consecutive warm-up cycles with no failures of any emission related diagnostic test.
^ Use a scan tool to clear DTCs.
^ Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended.

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

3. Checking for a faulty crank A sensor or circuit failure.
4. Checking for a faulty crank B sensor or circuit failure.
6. To ensure accurate voltage readings, connect the DMM J 39200 to the sensor before recording the Peak Min Max voltage.
7. To ensure accurate voltage readings, connect the DMM J 39200 to the sensor before recording the Peak Min Max voltage.
8. A diagnostic jumper can be created with the terminals supplied in the J 38125-A Terminal Repair Kit. Assemble the jumpers and terminals and cover the exposed terminals with heat shrink tubing. Do not cover the spade of the male terminals.