Circuit Description
The cruise Resume/Accel switch is an input to the fuel control portion
of the PCM. These inputs allow the PCM to control and hold a previously set
speed. Cruise Resume/Accel switch sends ignition voltage to the PCM
when the switch is closed (ON).
Conditions for Running the DTC
| • | The PCM performs this DTC diagnostic continuously. |
| • | The cruise control ON/OFF switch is in the OFF position. |
Conditions for Setting the DTC
| • | Ignition voltage on resume signal circuit. |
| • | All of the diagnostic set conditions met for 2 seconds. |
or
| • | The resume switch is ON for longer than 300 seconds. |
| • | All of the diagnostic set conditions met for 2 seconds. |
Action Taken When the DTC Sets
| • | The PCM disallows all cruise control inputs. |
| • | TCC shift schedules may be affected. |
| • | The PCM will not illuminate the malfunction indicator lamp (MIL). |
| • | The PCM records the operating conditions at the time the diagnostic
fails. This information stores in the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | A History DTC will clear when forty consecutive warm-up cycles,
if this or any other emission related diagnostic does not report any failures. |
Diagnostic Aids
Important: Remove any debris from the PCM module connector surfaces before servicing
the PCM module. Inspect the PCM module connector gaskets when diagnosing/replacing
the module. Ensure that the gaskets are installed correctly. The gaskets
prevent contaminate intrusion into the PCM module.
Check for a resume/accel switch stuck in the engage position or the
signal circuit is shorted to voltage.
