Component Location
1. PCM
General Description

A communication line exists between the Engine Control Module(PCM) and the Transaxle Control Module(TCM). The communication is through a Control Area Network(CAN). Without CAN communication, an independent pin and wiring is needed to receive a sensor information from a PCM. The more information to be communicated, the more wirings is required. In case of CAN communication type, all the information need to be communicated among control modules such as PCM and ABS control module use CAN lines.

DTC Description

If there is no message from A/C Control module to ECM through external CAN line, ECM sets DTC U0164.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

–

CAN communication status check

1.

Poor connection

Enable Conditions

–

IG ON

Threshold Value

–

No message time from Instrument clustere via external CAN

Diagnostic Time

–

Continuous

MIL ON Condition

–

2 driving cycle

Diagnostic Circuit Diagram
Signal Waveform & Data

Fig.1) Normal waveform with ignition ON

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