DTC Advanced Diagnostics: P0600 (L15B7/L15BA/L15BY (CVT System))

DTC Advanced Diagnostics: P0600

DTC P0600:Serial Communication

General Description

The driver IC which has diagnostic function and the CPU are built into the transmission control module (TCM). If the CPU cannot receive diagnostic information from the driver IC for a specified duration due to occurrence of communication abnormality between the driver IC and the CPU, the TCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	5 seconds or more
DTC Type	One drive cycle, MIL on, Shift position indicator blinks

Enable Conditions

Condition
Other	When the vehicle is turned to the ON or OFF (LOCK) mode

Malfunction Threshold

One of the conditions is met for at least 5 seconds:

	The CPU does not receive signal from the driver IC via the communication lines.
	The signal sent from the driver IC is abnormal.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

TCM internal circuit failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on, the shift position indicator blinks, and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory.

Conditions for clearing the DTC

The shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.