DTC Description

The Air conditioner Control Module sets DTC B1686 when vehicle speed signal has not been received through the CAN signal.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

•

Check CAN signal

1.

Poor connection in power supply circuit of A/C Control Module

2.

Open in A/C Control Module C- CAN communication line

3.

Short to ground in C-CAN communication line

4.

Short to battery in C-CAN communication line

5.

Faulty wheel Speed Sensor

6.

Faulty EMS

7.

Faulty TCM Speed Sensor

Enable Conditions

•

IG KEY ON

Threshold value

•

When vehicle speed signal has not been received through the CAN signal.

Failsafe

•

Substitued vehicle speed value as '0Km/h(0Mile/h)'

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