DTC Description

If abnormal MDPS CAN message is received, HECU sets DTC C1688.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•

CAN Message Monitoring

1.

Defected MDPS ECU

Threshold Value

•

VSM2 message count does not increase for 100 msec.

•

Mis-match between VSM2 message checksum and ESC(ESP) calculated checksum for 100 msec.

•

Diagnostic signal of VSM2 message as fault is detected for 100 msec.

•

The fault is not checked for 2 sec after ignition "ON"

Fail Safe

•

VSM inhibited(ESC[ESP] Only)

Warning Indicator Lamp Status

•

-

Clear Condition

•

Ignition "OFF" and then "ON"

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