Last Modified: 11-29-2007 1.6 C
Service Category: Brake Section: Brake Control/Dynamic Control System
Model Year: 2008 Model: Sequoia Doc ID: RM000001K2400HX
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DESCRIPTION (2008 Sequoia)

DTC

C1203/53

ECM Communication Circuit Malfunction

DESCRIPTION

A new skid control ECU is supplied without engine variation data. Until it is recognized by the ECU, DTC C1203/53 remains stored. By entering test mode, recognition of engine variation data is automatically conducted, and DTC C1203/53 is cleared automatically.

DTC Code

DTC Detection Condition

Trouble Area

C1203/53

When all of following conditions detected:

  1. Engine variation data from ECM does not match one in skid control ECU non-volatile memory.
  2. DTC U0073/94 not detected.
  3. DTC U0100/65 not detected.
  • Test mode not performed
  • VSC actuator (skid control ECU)

INSPECTION PROCEDURE

NOTICE:

When replacing the VSC actuator assembly, perform zero point calibration BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION (2008 Sequoia) .

PROCEDURE

1.

PERFORM TEST MODE INSPECTION

(a) Perform a TEST MODE inspection BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: TEST MODE PROCEDURE (2008 Sequoia) .

NEXT

2.

RECONFIRM DTC

(a) Clear the DTC BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) .

(b) Start the engine.

(c) Check if the same DTC is output BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) .

Result

Result

Proceed to

DTC is output

A

DTC is not output

B
A