Part 3

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P0571,P0571: Stop Light Switch Circuit Malfunction
P0571 - Brake Switch "A" Circuit

PART 3

17. CHECK HARNESS AND CONNECTOR

(a) Disconnect the stop light switch assembly connector.





(b) Disconnect the ECM connector.

(c) Disconnect the stop light control relay connector.

(d) Disconnect the skid control ECU connector.

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

Standard Resistance (Check for Short):





Result:





Text in Illustration





(f) Reconnect the stop light switch assembly connector.

(g) Reconnect ECM connector.

(h) Reconnect the stop light control relay connector.

(i) Reconnect the skid control ECU connector.

C -- REPLACE ECM (for 4GR-FSE) Removal

B -- REPLACE ECM (for 2GR-FSE) Removal

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR

18. CHECK HARNESS AND CONNECTOR

(a) Disconnect the stop light switch assembly connector.





(b) Disconnect the stop light control relay connector.

(c) Remove the BRK-LP relay from the No. 2 engine room relay block.

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

Standard Resistance (Check for Short):





Text in Illustration





(e) Reconnect the stop light switch assembly connector.

(f) Reconnect the stop light control relay connector.

(g) Reinstall the BRK-LP relay.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BATTERY)

19. INSPECT MAIN BODY ECU LH (LH-IG1 RELAY)

(a) Disconnect the main body ECU LH connectors.





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

Standard Resistance:





Text in Illustration





(c) Reconnect the main body ECU LH connectors.

NG -- REPLACE MAIN BODY ECU LH (LH-IG1 RELAY)
OK -- Continue to next step.

20. CHECK HARNESS AND CONNECTOR (BRK-LP RELAY - MAIN BODY ECU LH)

(a) Remove the BRK-LP relay from the No. 2 engine room relay block.





(b) Disconnect the main body ECU LH connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(d) Reinstall the BRK-LP relay.

(e) Reconnect the main body ECU LH connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BRK-LP RELAY - MAIN BODY ECU LH)
OK -- Continue to next step.

21. CHECK MAIN BODY ECU LH (TERMINAL VOLTAGE)

(a) Disconnect the main body ECU LH connector.





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

Standard Voltage:





Text in Illustration





(c) Reconnect the main body ECU LH connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (LH-IG1 RELAY - BATTERY)
OK -- Continue to next step.

22. CHECK HARNESS AND CONNECTOR (LH-IG1 RELAY - BODY GROUND)

(a) Disconnect the main body ECU LH connector.





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

Standard Resistance (Check for Open):





Text in Illustration





(c) Reconnect the main body ECU LH connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (LH-IG1 RELAY - BODY GROUND)
OK -- Continue to next step.

23. CHECK HARNESS AND CONNECTOR (LH-IG1 RELAY - POWER SOURCE CONTROL ECU)

(a) Disconnect the main body ECU LH connector.





(b) Disconnect the power source control ECU connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(d) Reconnect the main body ECU LH connector.

(e) Reconnect the power source control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (LH-IG1 RELAY - POWER SOURCE CONTROL ECU)

OK -- GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START