Vehicle Stability Control System Trac Off Indicator Light Remains On

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

CHECK BATTERY

INSPECT SKID CONTROL ECU (CSW TERMINAL)

INSPECT COMBINATION METER ASSEMBLY

INSPECT VSC OFF SWITCH

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When replacing the brake actuator assembly, perform zero point calibration (COROLLA_ZRE142 RM000000XHR08KX.html).

1. Check if a CAN communication system DTC is output (COROLLA_ZRE142 RM000000WIB0BUX.html).
   
   

   Result:

   
   

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

1. Check if the skid control ECU connector is securely connected.
   

   OK:

   The connector is securely connected.
   

1. Check the battery voltage.
   

   Standard Voltage:

   11 to 14 V
   

   
   

   Result:

   
   

   Result	Proceed to
   OK	A
   NG (for 2AZ-FE)	B
   NG (for 2ZR-FE)	C

1. Disconnect the skid control ECU connector.
   

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

   Standard Resistance:

   Tester Condition	Switch Condition	Specified Condition
   A66-30 (CSW) - Body ground	VSC OFF switch OFF (Not pressed)	10 kΩ or higher

1. Reconnect the skid control ECU connector.
   

2. Perform the Active Test of the combination meter (meter CPU) using the Techstream (COROLLA_ZRE142 RM0000012G70D8X.html).
   

3. Check the combination meter.
   

   OK:

   The TR(A)C OFF indicator light turns on or off in accordance with the Techstream operation.
   

   HINT:

   If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (COROLLA_ZRE142 RM000000XHN0DUX.html).

1. Disconnect the VSC OFF switch connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   6 (+) - 3 (E)	Switch is pushed in	Below 25 Ω
   6 (+) - 3 (E)	Switch is not pushed in	10 kΩ or higher

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   A66-30 (CSW) - E47-6 (+)	Always	Below 1 Ω
   A66-30 (CSW) - Body ground	Always	10 kΩ or higher
   E47-3 (E) - Body ground	Always	Below 1 Ω

   HINT:

   If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (COROLLA_ZRE142 RM000000XHN0DUX.html).