Without Buzzer

Speedometer Without Buzzer:

WIRING DIAGRAM

Electronic Speedometer With/Without Buzzer: Component Location:

COMPONENT LOCATION VIEW

Electronic Speedometer With/Without Buzzer: Component ID:

COMPONENT ID
111 Electronic speedometer in the main instrument display panel.
112 Sensor, electronic speedometer, on the gearbox.
132 Vehicle speed sensor, in the speedometer.
210 EDU trip computer in the main instrument display panel.
241 SCC trip computer in the centre of the dashboard.
256 Speed warning buzzer, in the centre console's bottom storage compartment.
356 Speed warning control module, at the rear of the bottom storage compartment in the centre console.
430 Saab Trionic control module, in the engine bay at left on the bulkhead partition.
508 Cruise Control system control module, adjacent to the battery tray.
510 Motronic 2.8.1 control module, in engine bay behind the bulkhead partition.
589 Saab Trionic OBDII control module, in the engine bay at left on the bulkhead partition.

2-Pin Connectors
H2-9 In the centre console under the front ashtray.
H2-18 In the engine bay behind the engine under the intake manifold.

3-Pin Connectors
H3-20 Behind the main instrument display panel beside the speedometer (ME).
H3-24 Adjacent to speed warning control module 356.

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

Grounding Points
G8 Grounding point, dashboard, by the left-hand front loudspeaker socket.

DESCRIPTION OF OPERATION
Without Buzzer
The car is fitted with an electronic speedometer. Transmission between the gearbox and the speedometer is electronic.

When ignition switch 20 is in the Drive position, current is supplied to pin 1 of the sensor, vehicle speed sensor 132, which sends a pulsed signal to the Cruise Control and speed warning systems, as well as to other systems.

The pulse frequency is 2,458 pulses per kilometer.

Vehicle speed sensor 112 is mounted in the gearbox. It sends an alternating current signal, the frequency of which varies with the speed of the car, to electronic speedometer 111 in the main instrument display panel. The pulse frequency of vehicle speed sensor 112 is four times that of sensor 132.

FAULT DIAGNOSIS HINTS
1. Check that current is supplied to pin 1 of the speed sensor.
2. Check that there is no open circuit in sensor 112.
3. Check the connectors, wiring harness and ground connections.