Main Switch Circuit

CRUISE CONTROL: LANE-KEEPING ASSIST SYSTEM: Main Switch Circuit
- Main Switch Circuit

DESCRIPTION

The driving support ECU receives lane-keeping assist main switch ON/OFF signal from the steering pad switch assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch Removal.

(b) Disconnect the z9 connector from the spiral cable.





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(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(d) Reconnect the connector.

(e) Reinstall the steering pad switch Installation.

NG -- REPLACE STEERING PAD SWITCH ASSEMBLY Removal
OK -- Continue to next step.

2. CHECK AND REPLACE SPIRAL CABLE SUB-ASSEMBLY

NOTICE:
The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the page shown in the brackets.

(a) Remove the spiral cable sub-assembly Removal.





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

Standard Resistance:





Text in Illustration





HINT
The spiral cable makes a maximum of approximately 5 rotations.

(c) Install the spiral cable sub-assembly Installation.

NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - DRIVING SUPPORT ECU)

(a) Disconnect the driving support ECU connector.

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

Standard Resistance:





(c) Reconnect the driving support ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - DRIVING SUPPORT ECU)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (BODY GROUND CIRCUIT)

(a) Disconnect the spiral cable connector.





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

Standard Resistance:





Text in Illustration





(c) Reconnect the connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BODY GROUND CIRCUIT)
OK -- Continue to next step.

5. INSPECT DRIVING SUPPORT ECU

(a) Turn the power switch on (IG).





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPLACE DRIVING SUPPORT ECU Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures