For 1990-2009 cars

### Circuit Description

The cruise functions are not enabled until the powertrain control module (PCM) recognizes the correct voltage from the cruise control ON/OFF switch. The following flow chart verifies the integrity of the circuit and switch.

### Test Description

1. If any DTCs are present, diagnosis should begin with the specific DTC chart.
2. Verify the ground circuit at the cruise switch.
3. If the PCM recognizes all switch inputs, circuit 1884 and the switch are OK.
4. Verify the cruise switch integrity.
5. Verify the roll connector integrity.
6. Verify the integrity of circuits 1884 and 341.

### Diagnostic Aids

• | If the complaint is an intermittent operation, refer to DTC P1584.

• | Special test functions will allow the scan tool to operate the cruise rod from idle to 50 percent throttle angle. This will verify system operation.

• | If proper voltage level is not received from the ON/OFF switch on circuit 1884, the system is never enabled.

• | On auto transaxle equipped vehicles, the PCM requires a brake switch transition to occur to allow cruise enable. A rolling restart with no brake transition could result in a cruise inoperative.