SAAB WIS ONLINE

DTC 22 VEHICLE SPEED SENSOR

DTC 22 VEHICLE SPEED SENSOR

DIAGNOSIS:

Disconnection or short circuit of vehicle speed sensor system.

TROUBLE SYMPTOM:

Cruise control cannot be set. (Cancelled immediately.)

WIRING DIAGRAM:


CHECK TRANSMISSION TYPE.

Is the transmission type MT?

Yes


No


CHECK HARNESS BETWEEN BATTERY AND VEHICLE SPEED SENSOR.

Turn the ignition switch to OFF.

Disconnect the harness connector from vehicle speed sensor.

Turn the ignition switch to ON.

Measure the voltage between vehicle speed sensor harness connector terminal and chassis ground.

Connector & terminal

(B17) No. 3 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No

Check the harness for open or short between fuse and vehicle speed sensor.


CHECK HARNESS BETWEEN CRUISE CONTROL MODULE AND VEHICLE SPEED SENSOR.

Turn the ignition switch to OFF.

Disconnect the harness connector from cruise control module.

Measure the resistance between vehicle speed sensor harness connector terminal and cruise control module harness connector terminal.

Connector & terminal

(B17) No. 1 — (B94) No. 19:

Is the resistance less than 10 Ω?

Yes


No

Repair the harness.


CHECK HARNESS BETWEEN VEHICLE SPEED SENSOR AND ENGINE GROUND.

Turn the ignition switch to OFF.

Measure the resistance between vehicle speed sensor harness connector terminal and engine ground.

Connector & terminal

(B17) No. 2 — Engine ground:

Is the resistance less than 10 Ω?

Yes


No

Repair the harness.


CHECK VEHICLE SPEED SENSOR.

Connect the harness connector to vehicle speed sensor.

Lift-up the vehicle and support with rigid racks.

Drive the vehicle at speed greater than 20 km/h (12 MPH).

Warning

Be careful not to be caught up by the running wheels.


Measure the voltage between cruise control module harness connector terminal and chassis ground.

Connector & terminal

(B94) No. 19 (+) — Chassis ground (−):

Is the voltage less than 1 V ←→ more than 5 V?

Yes

Replace the cruise control module.


No

Replace the vehicle speed sensor.


CHECK HARNESS BETWEEN CRUISE CONTROL MODULE AND TRANSMISSION CONTROL MODULE.

Turn the ignition switch to OFF.

Disconnect the harness connector from transmission control module and cruise control module.

Measure the resistance between cruise control module harness connector terminal and transmission control module harness connector terminal.

Connector & terminal

(B94) No. 19 — (B56) No. 17:

Is the resistance less than 10 Ω?

Yes


No

Repair the harness.


CHECK TRANSMISSION CONTROL MODULE.

Connect the harness connector to transmission control module.

Lift-up the vehicle and support with rigid racks.

Drive the vehicle faster than 10 km/h (6 MPH).

Warning

Be careful not to be caught by the running wheels.


Measure the voltage between transmission control module harness connector terminal and chassis ground.

Connector & terminal

(B56) No. 17 (+) — Chassis ground (−):

Is the voltage less than 1 V ←→ more than 5 V?

Yes

Replace the cruise control module.


No

Replace the transmission control module.