Cruise Control

Qm�UCruise Control System:

WIRING DIAGRAM

Cruise Control System: Component Location:

COMPONENT LOCATION VIEW

Cruise Control System: Component ID:

COMPONENT ID
22A Fuse board behind the cover flap in the glove box.
29 Brake light switch beside the brake pedal.
30 Brake lights in the rear light clusters.
47U Cruise Control indicator lamp, in the main instrument display panel.
76 Idling speed increase switch, automatic transmission, in transmission range switch 239 adjacent to the selector lever.
132 Vehicle speed sensor, in the speedometer.
133 Clutch pedal switch, Cruise Control, on the clutch pedal.
134 Brake pedal switch, Cruise Control, on the brake pedal.
141 Switch, speed control, on the direction indicator stalk switch on the left-hand side of the steering wheel.
228A Filament monitor, rear lamps, in luggage compartment on the left-hand side.
230 Distribution terminal (+30 circuit) in main fuse box behind the glove box.
231 Distribution terminal (+54 circuit) in main fuse box behind the glove box.
239 Transmission range switch beside the selector lever.
430 Saab Trionic control module, in engine bay on the left behind the bulkhead partition.
507 Control module, TCS V6, under Cruise Control, adjacent to the battery tray.

3-Pin Connectors
H3-20 Behind the main instrument display panel adjacent to the speedometer (ME).
H3-26 (RHD) above the pedal bracket beside the pedal switches.

70-Pin Connector
H70-1 In the engine bay, behind the bulkhead partition.

Grounding Points
G2 Grounding point, behind the battery on the left-hand wheel housing.
G3 Grounding point, luggage compartment, on the left-hand side adjacent to the left-hand rear light cluster.
G8 Grounding point, dashboard, by the left-hand front loudspeaker socket.
G29 Grounding point, luggage compartment, on the right-hand side adjacent to the right-hand rear light cluster.

DESCRIPTION OF OPERATION
The Cruise Control system consists of the following components:
^ Control module 508.
^ Vehicle speed sensor 132.
^ Cruise Control switch 141.
^ Pedal switches 133 (manual gearbox) and 134.
^ Brake light switch 29 or signal from TCS control module 507 for V6.

Control Module 508
The control module incorporates an electric stepping motor, which mechanically controls the Cruise Control cable.

Current (+54 circuit) is supplied to control module pin F via fuse 2.

Vehicle Speed Sensor 132
The sensor continuously reads the speed and supplies this data to the control module via pin K.

Switch 141
The Cruise Control system is engaged using switch 141. The different positions of the switch are:

Position ON: Current is supplied to the control module via pin A.

Position SET: Current is supplied to the control module via pin B and the speed of the car is read using vehicle speed sensor 132.

Position TIP: Between ON and OFF on the switch is a TIP position. When this position is selected, the current supplied to pin A of the control module is shut off and the Cruise Control is disconnected. When the button is released, it springs back to the ON position, at which point current is again supplied to pin A at the control module.

Position RESUME: Restores the selected speed stored in the control module memory after either at pedal switches 133 and 134 has been activated. Current is supplied to control module pin C.

Pedal Switches 133 And 134
When the brake or clutch pedal is depressed, the current supplied to pin D of the relevant pedal switch, 133 or 134, is cut off and the Cruise Control system is disengaged.

Cars With Trionic
On cars equipped with the Trionic engine management system, a turbo engine and the Cruise Control system, terminal 36 of Trionic control module 430 receives a signal from pin J of the Cruise Control system's control module to the effect that the system is operative.

This results in more even control of the vehicle's speed.

Automatic Transmission
When the selector lever is in one of the drive positions, switch 76 in selector lever 239 is closed. Pin D then receives a 12 V signal which means that the Cruise Control system can be activated. This means that the system is not operative until the selector lever is in one of the drive positions.

Indicator Lamp 47U
Cars for certain markets are equipped with a CRUISE indicator lamp, 47U, which lights up when switch 141 is set to the ON position.

FAULT DIAGNOSIS HINTS
The Cruise Control system is activated by turning the ignition switch to the Drive position.

Position ON:
1. Check that fuse 2 is intact and supplied with current (manual gearbox).
2. Check that fuse 9 is intact and that current is supplied to it and to switch 76 (automatic transmission).
3. Check the current supplied to terminal 4 of switch 141 and terminal A of control module 508.
4. Check the current supplied to terminal 1 of vehicle speed sensor 132.

Position A-B SET (spring-loaded):
1. Check the current supplied to terminal 2 of the switch and to terminal B of the control module.

Position RESUME (spring-loaded):
1. Check the current supplied to terminals 1 and 3 of the switch and to terminals A and C of the control module.

Check the connections, connectors and grounding points for the wiring harness in question.