Cruise Control System

DIAGNOSTIC CODE 14 (Set/coast Switch, Resume/accel Switch, Cancel Switch)

DIAGNOSIS:
Short circuit inside the SET SW and RESUME SW.

TROUBLE SYMPTOM:
Cruise control cannot be set. (Cancelled immediately.)

Wiring Diagram:

WIRING DIAGRAM

8E1: CHECK POWER SUPPLY.

1. Turn ignition switch to ON.
2. Turn cruise control main switch to ON.
3. Set select monitor in "Current Data Display & Save" mode.
4. Check signals for proper operation.
1. When pushing the SET/COAST switch:
The SET/COAST switch shown on the display turns from "OFF" to "ON".
2. When pushing the RESUME/ACCEL switch:
The RESUME/ACCEL switch shown on the display turns from "OFF" to "ON".

5. Turn ignition switch to OFF.
6. Disconnect connector from cruise control command switch.
7. Turn ignition switch to ON.




8. Measure voltage between cruise control command switch connector and chassis ground.

CHECK: Is voltage more than 10 V ?

YES: Go to step 8E2.

NO: Repair or replace wiring harness between fuse & relay box and cruise control command switch.

8E2: CHECK THE CRUISE CONTROL COMMAND SWITCH.

1. Turn ignition switch to OFF.
2. Connect connector of cruise control command switch.
3. Turn ignition switch to ON.




4. Measure voltage between cruise control command switch connector and chassis ground.

CHECK: Is voltage more than 10 V ? (When SET/COAST switch is ON.)

YES: Go to step 8E3.

NO: Replace cruise control command switch.

8E3: CHECK THE CRUISE CONTROL COMMAND SWITCH.




Measure voltage between cruise control command switch connector and chassis ground.

CHECK: Is voltage more than 10 V ? (When RESUME/ACCEL switch is ON.)

YES: Go to step 8E4.

NO: Replace cruise control command switch.

8E4: CHECK THE CRUISE CONTROL COMMAND SWITCH.




Measure voltage between cruise control command switch connector and chassis ground.

CHECK: Is voltage more than 10 V? (When CANCEL switch is ON.)

YES: Go to step 8E5.

NO: Replace cruise control command switch.

8E5: CHECK THE CRUISE CONTROL COMMAND SWITCH.




Measure voltage between cruise control command switch connector and chassis ground.

CHECK: Is voltage more than 10 V? (When CANCEL switch is ON.)

YES: Go to step 8E6.

NO: Replace cruise control command switch.

8E6: CHECK THE CRUISE CONTROL COMMAND SWITCH.

1. Turn ignition switch to OFF.
2. Disconnect connector from cruise control command switch.




3. Measure resistance between terminals of cruise control command switch connector (switch side) to check the switch operation.

CHECK: Is resistance less than 10 Ohm? (When SET/COAST switch is ON.)

YES: Go to step 8E7.

NO: Replace cruise control command switch.

8E7: CHECK THE CRUISE CONTROL COMMAND SWITCH.




Measure resistance between terminals of cruise control command switch connector (switch side) to check the switch operation.

CHECK: Is resistance more than 1 MOhm? (When SET/COAST switch is OFF.)

YES: Go to step 8E8.

NO: Replace cruise control command switch.

8E8: CHECK THE CRUISE CONTROL COMMAND SWITCH.




Measure resistance between terminals of cruise control command switch connector (switch side) to check the switch operation.

CHECK: Is resistance less than 10 Ohm? (When RESUME/ACCEL switch is ON.)

YES: Go to step 8E9.

NO: Replace cruise control command switch.

8E9: CHECK THE CRUISE CONTROL COMMAND SWITCH.




Measure resistance between terminals of cruise control command switch connector (switch side) to check the switch operation.

CHECK: Is resistance more than 1 MOhm? (When RESUME/ACCEL switch is OFF)

YES: Go to step 8E10.

NO: Replace cruise control command switch.

8E10: CHECK HARNESS CONNECTOR BETWEEN CRUISE CONTROL COMMAND SWITCH AND CRUISE CONTROL MODULE.

1. Disconnect connector from cruise control module.




2. Measure resistance of harness connector between cruise control command switch and cruise control module.

CHECK: Is resistance less than 10 Ohm?

YES: Go to step 8E11.

NO: Repair or replace wiring harness.

8E11 : CHECK HARNESS CONNECTOR BETWEEN CRUISE CONTROL COMMAND SWITCH AND CRUISE CONTROL MODULE.




Measure resistance of harness connector between cruise control command switch and cruise control module.

CHECK: Is resistance less than 10 Ohm?

YES: Replace cruise control module.

NO: Repair or replace wiring harness.