Toyota Tundra Service Manual: Brake System Malfunction (C13A9)

DESCRIPTION

This DTC is stored when a malfunction is detected in the vehicle stability control system. Check the vehicle stability control system when DTC C13A9 is stored.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

C13A9

Brake System Malfunction

-

An oil pressure sensor or ABS system malfunction signal is received for 1 second or more from the skid control ECU (brake actuator assembly)

  • Vehicle stability control system
  • Trailer brake control ECU (brake control with bracket relay)

CAUTION / NOTICE / HINT

NOTICE:

The trailer brake control system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

Click here

PROCEDURE

1.

CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)

HINT:

Trailer brake control system DTC C13A9 may be stored due to a malfunction in the vehicle stability control system. Therefore, it is necessary to check for and troubleshoot vehicle stability control system DTCs first.

(a) Check for DTCs.

Click here

Result

Proceed to

Vehicle stability control system DTCs are not output

A

Vehicle stability control system DTCs are output

B

B

GO TO VEHICLE STABILITY CONTROL SYSTEM

A

2.

CHECK FOR DTCs (TRAILER BRAKE CONTROL SYSTEM)

(a) Clear the DTCs.

Click here

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Check if the same DTC is output.

Click here

Result

Proceed to

DTCs C13A9 is not output.

A

DTCs C13A9 is output.

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE CONTROL WITH BRACKET RELAY

    Trailer Brake Control System

    Slider Switch Circuit (C14A0)

    See More:

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