B2476

Diagnostic Chart:

CIRCUIT DESCRIPTION
If the voltage received from the Three Button Assembly to the VIU is not between a predescribed high and low limit then the VIU will set the DTC.

CONDITIONS FOR RUNNING THE DTC
The Ignition must be in the Run or ACC position and the VIU power must be on. The VIU will run this test every 300 msec during VIU power on.

CONDITIONS FOR SETTING THE DTC
If the voltage received from the Three Button Assembly to the VIU is not between a prediscribed high and low limit then the VIU will set the DTC.

ACTION TAKEN WHEN THE DTC SETS
When the code is current the VIU will use the ROM default block for making the Checksum calculations.

CONDITIONS FOR CLEARING THE MIL/DTC
The code can be cleared when the VIU does not detect a failure during the last diagnostic cycle.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. Checks the circuits of the Three Button Assembly for shorts, opens and continuity
4. This is to check operation of the Three Button Assembly through the Tech 2.
7. Using the Tech 2 check to make sure that the repair was made.