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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 148 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0989 To DTC P2764) >> DTC P1684, P1685 or P1686 >> Conditions for Setting the DTC >> Fail Case 3

Fail Case 3

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The TCM power up temperature changes by greater than or equal to 20°C (36°F) 14 times over 7 seconds.

DTC P1685 

The TCM power up temperature is less than or equal to -61°C (-77°F) for greater than 10 seconds.

DTC P1686 

The TCM power up temperature is greater than or equal to 161°C (321°F) for greater than 10 seconds.

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