Cruise Control Switch Circuit

CRUISE CONTROL: CRUISE CONTROL SYSTEM: Cruise Control Switch Circuit

Cruise Control Switch Circuit

DESCRIPTION

The cruise control main switch operates seven functions: SET, '-' (COAST), TAP-DOWN, RESUME, '+' (ACCEL), TAP-UP, and CANCEL. The SET, TAP-DOWN and COAST functions, and the RESUME, TAP-UP and ACCEL functions are operated with the same switch. The cruise control main switch is an automatic return type switch which turns on only while operating it in each arrow direction and turns off after releasing it. The internal contact point of the cruise control main switch is turned on with the switch operation. Then the ECM reads the voltage that has been changed by the switch operation to control SET, '-' (COAST), RESUME, '-' (ACCEL) and CANCEL.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHOOSE DIAGNOSIS METHOD
(a) Choose the diagnosis method.






B -- INSPECT CRUISE CONTROL MAIN SWITCH ASSEMBLY
A -- Continue to next step.
2. READ VALUE ON INTELLIGENT TESTER





(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) According to the display on the tester, read the "DATA LIST".
ECM (Cruise Control):






OK:
When the cruise control main switch is operated, the display changes as shown above.
Result:






C -- REPLACE CRUISE CONTROL MAIN SWITCH ASSEMBLY
A -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
B -- Continue to next step.
3. INSPECT CRUISE CONTROL MAIN SWITCH ASSEMBLY
(a) Disconnect the cruise control main switch connector.





(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE CRUISE CONTROL MAIN SWITCH ASSEMBLY
OK -- Continue to next step.
4. INSPECT SPIRAL CABLE SUB-ASSEMBLY





(a) Disconnect the S7 spiral cable connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY
OK -- Continue to next step.
5. CHECK WIRE HARNESS (SPIRAL CABLE - ECM AND BODY GROUND)





(a) Disconnect the E5 connector from the ECM.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
OK -- REPAIR OR REPLACE HARNESS AND CONNECTOR