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C1612

DTC C1612 CAN TIME-OUT TCU

DESCRIPTION
The CAN is for sending and receiving the information for TCS (ESC) control, between the HECU and EMS/TCU. This code shows in case that there is no signal to the CAN from TCU.

DTC Detecting Condition:






FAIL-SAFE FUNCTION
The TCS/ESC function is inhibited, while the ABS and EBD controls allowed.
The TCS/ESC warning lamp is ON, but the ABS and EBD warning lamps OFF.

INSPECTION PROCEDURE
1. CHECK DTC DETECTED IN HI-SCAN
1. Clear the DTC related to the CAN, from the EMS or TCU by using the HI-SCAN.
2. Check if any DTC related to the CAN is detected again, when the ignition switch ON.

Is any DTC related to the CAN, detected again?

NO - Problem is intermittent and the HECU memory was not cleared.

YES - Check open/short in circuit of the CAN.

2. CHECK OPEN/SHORT IN CIRCUIT OF THE CAN
1. Check an open or short in the circuit between terminal 10 of the HECU connector and terminal 4 of PCM connector.
2. Check an open or short in the circuit between terminal 11 of the HECU connector and terminal 7 of PCM connector.

Is the circuit normal?

NO - Check and repair harness and connector.

YES - Check the PCM.