C1A05
CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM: C1A05: Stop Light Switch Circuit
C1A05 - Stop Light Switch Circuit
DESCRIPTION
When the brake pedal is depressed, the stop light switch assembly sends a signal to the driving support ECU via the ECM. After receiving the signal, the driving support ECU cancels the lane departure alert system.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - BATTERY)
(a) Disconnect the A5 stop light switch connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT STOP LIGHT SWITCH ASSEMBLY
(a) Remove the stop light switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE STOP LIGHT SWITCH ASSEMBLY Removal
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - ECM)
(a) Disconnect the A5 stop light switch connector.
(b) Disconnect the G44 and G45 ECM connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. REPLACE DRIVING SUPPORT ECU
(a) Replace the driving support ECU Removal.
NEXT -- Continue to next step.
5. CHECK FOR DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Perform the following to make sure the DTC detection conditions are met.
HINT
If the detection conditions are not met, the system cannot detect the malfunction.
(1) Drive the vehicle at a speed of 50 km/h (30 mph) or more and operate the lane departure alert system.
(c) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC C1A05 is not output.
NG -- REPLACE ECM Removal
OK -- END (DRIVING SUPPORT ECU IS DEFECTIVE)