Open or Short in Brake Inhibit Relay Circuit - Vehicle Stability Control System

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1311/12: Open or Short in Brake Inhibit Relay Circuit

DTC C1311/12 - Open or Short in Brake Inhibit Relay Circuit

DESCRIPTION

The stop light control relays are built into the stop light circuit and prohibits the stop light from turning on under VSC control.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE: When replacing the VSC actuator assembly, perform the zero point calibration Programming and Relearning.

PROCEDURE

1. CHECK TERMINAL VOLTAGE (STOP LIGHT CONTROL RELAY)




(a) Remove the stop light control relays from the engine room relay block.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT STOP LIGHT CONTROL RELAY (BRK NO. 1, BRK NO. 2)




(a) Remove the stop light control relays (BRK NO. 1 and BRK NO. 2) from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for BRK NO. 1





for BRK NO. 2





NG -- REPLACE STOP LIGHT CONTROL RELAY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - SKID CONTROL ECU)




(a) Disconnect the A17 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE VSC ACTUATOR ASSEMBLY