Pinpoint Test 4

PINPOINT TEST 4: FOUR-WHEEL DRIVE (4WD) CONTROL MODULE DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

Normal Operation
The 4WD control module communicates with the WDS or equivalent tester through the international standards organization (ISO) 9141 communication network circuit (LB/W). If circuit (LB/W) becomes open or shorted to ground communications to that module are not possible. Check circuit (LB/W) between the 4WD control module 0318-02 and the data link connector (DLC) D-01. The total resistance value must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open in circuit (LB/W), damage to the DLC D-01, or damage to the 4WD control module 0318-02.

Possible Causes
- ISO 9141 communication network circuit (LB/W) open
- 4WD control module 0318-02
- 4WD control module

CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

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