For 1990-2009 cars

The electronic cruise control is a speed control system. The system maintains a desired vehicle speed under normal driving conditions. Steep gradients may cause variations in the selected speed. The electronic cruise control system is capable of performing the following functions:

• | Cruise

• | Coast

• | Resume speed

• | Accelerate

• | Tap-up

• | Tap-down

The cruise control system uses a cruise control module assembly in order to obtain the desired cruise operation. The following 2 components in the module are primarily responsible for performing this operation:

• | An electronic controller

• | An electric stepper motor

The controller performs the following functions:

• | Monitor the vehicle speed

• | Operate the electronic stepper motor

The motor moves a band and throttle linkage in response to the controller. This action maintains the desired cruise speed. The cruise control module assembly is controlled by a low speed limit which prevents system engagement below 40 km/h (25 mph). The module is controlled by mode control switches located on the multi-function turn signal lever. The cruise control is in a standby disabled mode until all conditions inconsistent with cruise control operation are cleared.

Battery voltage is applied or present under the following conditions:

• | With the ignition switch in RUN, the battery voltage is applied to terminal F of the cruise control module.

• | When the slider switch is moved to the ON position, the battery voltage is applied to terminal A of the cruise control module connector.

• | If the brake pedal is not depressed, the battery voltage is present at module terminal D.

• | If the brake pedal is depressed, the battery voltage is present at module terminal G.

The following conditions are present during cruise control operation:

• | Terminal G must have current flow for the cruise control to operate (disable) properly.

• | When the slider switch is moved to the RESUME/ACCEL position, the battery voltage is applied to terminal C of the module.

• | When the set switch is depressed, the battery voltage is present at module terminal B.

• | The cruise control module connector terminal K is the speed signal terminal. During operation, voltage oscillates between a high that is equal to the battery voltage and a low of 0.5 volts.

• | Ground is at the module terminal E.

• | The module terminal J signals the powertrain control module (PCM) when the cruise control engages. The PCM determines the correct shift pattern for the transmission.

• | The PCM uses terminal H in order to inhibit the cruise control when present conditions are not consistent with the cruise control:

- | The engine is off.

- | The automatic transmission is in PARK or NEUTRAL.

- | The manual transmission is out of gear (in NEUTRAL).

- | There is a high engine RPM (fuel cut-off).

- | There is a high vehicle speed (fuel cut-off).

- | The PCM sets certain DTCs or other failure records. Refer to Diagnostic System Check in Engines Controls.