U0129

Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn power switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Turn the power switch OFF to ON.
2.Perform self-diagnosis for "EHS/PKB".
Is DTC "U0129" detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. PERFORM SELF-DIAGNOSIS

With CONSULT
Perform self-diagnosis for "ABS". Refer to "CONSULT Function" Scan Tool Testing and Procedures.
Is DTC "U1000" detected?
YES- Proceed to "Trouble Diagnosis Flow Chart" Trouble Diagnosis Flow Chart.
NO- GO TO 2.

2. CHECK CAN COMMUNICATION LINE

Check the "EHS/PKB BRANCH LINE CIRCUIT". Refer to "Diagnosis Procedure" CAN.
Is the inspection result normal?
YES- Replace the electric parking brake control module. Refer to "Removal and Installation" Removal And Installation.
NO- Repair or replace error-detected parts. Refer to "Precautions for Harness Repair" CAN.