P1582

DTC P1582

CIRCUIT DESCRIPTION




To control which direction the cruise control module moves the accelerator pedal, the engine control module (ECM) commands the Cruise Control Servo Move Direction Signal circuit either high, wide open throttle (WOT) or low, idle. If the Cruise Servo Move Direction Signal circuit is commanded high and the ECM detects low feedback voltage, DTC P1582 will set.

CONDITIONS FOR RUNNING THE DTC
Every time the Cruise Control Servo Move Direction Signal circuit is commanded high.

CONDITIONS FOR SETTING THE DTC
- The ECM detects low feedback voltage when the Cruise Control Servo Move Direction Signal circuit is commanded high.
- The condition exists for 500 ms.

ACTION TAKEN WHEN THE DTC SETS
- The ECM stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.

CONDITIONS FOR CLEARING THE DTC
- A last test failed, or current DTC, clears when the diagnostic runs and does not fail. A new ignition cycle must take place before a test passed can be reported.
- A history DTC will clear after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
- Use a scan tool in order to clear the DTC.

DIAGNOSTIC AIDS

IMPORTANT:
- To locate an intermittent problem, use a scan tool to perform the Cruise Control Cycle special function with the ignition ON, and the engine OFF. The accelerator pedal should move to 50 percent throttle and then return to idle. If a short to ground exists, the pedal will remain at rest or return to idle.
- C/C Dir. Ckt.-Low Volt test can be monitored to aid in diagnosing an intermittent fault. Monitor the test while tapping the Resume/Accel switch, this moves the throttle toward WOT. If a fault exists, the scan tool will display Test Fail.

TEST DESCRIPTION

Steps 1-7:

The number below refers to the step number on the diagnostic table.
2. This step determines if the fault is present.