Cruise Control System
DIAGNOSTIC TROUBLE CODE 12,13 AND 21 (VEHICLE SPEED SENSOR 2 SYSTEM)DIAGNOSIS:
Disconnection or short circuit of vehicle speed sensor 2 system.
TROUBLE SYMPTOM:
Cruise control cannot be set. (Cancelled immediately.)
Wiring Diagram:
WIRING DIAGRAM
8C1: CHECK OPERATION OF SPEEDOMETER.
Make sure that speedometer indicates the vehicle speed by driving the vehicle.
CHECK: Does speedometer indicate vehicle speed by driving vehicle?
YES: Go to step 8C2.
NO: Repair combination meter circuit.
8C2: CHECK INPUT SIGNAL FOR CRUISE CONTROL MODULE.
WARNING: Be careful not to be caught up by the running wheels.
1. Set the vehicle on free roller, or lift-up the vehicle and support with safety stands.
2. Set oscilloscope to cruise control module connector terminals.
3. Start the engine.
4. Shift on the gear position, and keep the vehicle speed at constant.
5. Measure signal voltage.
CHECK: Is the voltage more than 2 V?
YES: Replace cruise control module.
NO: Go to step 8C3.
NOTE:
- If the vehicle speed increases, the width of amplitude (W) decreases.
- If oscilloscope is not available, check input signal (vehicle speed signal) by using a select monitor. (Refer to the procedure as described.)
- Using the select monitor:
1. Set the vehicle on free roller, or lift-up the vehicle and support with safety stands.
2. Turn ignition switch to OFF and set select monitor.
3. Turn ignition switch to ON.
4. Turn cruise control main switch to ON.
5. Set select monitor in "Current Data Display & Save" mode.
6. Drive the vehicle at speed greater than 40 km/h (25 MPH).
7. Check that vehicle speed indication on select monitor and speedometer are equal.
- When there is a disconnection or short circuit in the harness between the meter and the cruise control module, the indicated value will be 0 to 1.0 km/h (0 to 0.6 MPH).
8C3: PERFORM A CIRCUIT TEST BETWEEN COMBINATION METER AND CRUISE CONTROL MODULE.
1. Turn ignition switch to OFF.
2. Remove combination meter.
3. Disconnect connector from cruise control module.
4. Measure resistance of harness connector between combination meter and cruise control module.
CHECK: Is resistance less than 10 Ohm?
YES: Go to step 8C4.
NO: Repair or replace harness connector.
8C4: PERFORM A CIRCUIT TEST BETWEEN COMBINATION METER AND CRUISE CONTROL MODULE.
Measure resistance of harness connector between cruise control module and chassis ground to make sure that circuit does not short.
CHECK: Is resistance more than 1 MOhm?
YES: Go to step 8C5.
NO: Repair or replace harness connector.
8C5: CHECK VEHICLE SPEED SENSOR 2.
1. Disconnect connector from vehicle speed sensor 2.
2. Measure resistance between terminals of vehicle speed sensor 2.
CHECK: Is resistance between 350 and 450 Ohm?
YES: Go to step 8C6.
NO: Replace vehicle speed sensor 2.
8C6: CHECK VEHICLE SPEED SENSOR 2.
1. Set the vehicle on free roller, or lift-up the vehicle and support with safety stands.
WARNING: Be careful not to be caught up by the running wheels.
2. Drive the vehicle at speed greater than 20 km/h (12 MPH).
3. Measure voltage between terminals of vehicle speed sensor 2.
NOTE:
Using an oscilloscope:
1. Turn ignition switch to OFF.
2. Set oscilloscope to vehicle speed sensor 2.
3. Drive the vehicle at speed greater than 20 km/h (12 MPH).
4. Measure signal voltage.
CHECK: Is voltage more than 2 V (AC range)?
YES: CHECK Repair or replace combination meter circuit.
NO: Replace vehicle speed sensor 2.