1. Turn the ignition switch on.
2. Using a Digital Multimeter (DMM), measure voltage between the following locations:

•	Trip calculator: terminal B9 and ground

•	Driver Information Display: terminal D and ground

Is the voltage within the specified value?

B+

Go to Step 3

Go to Step 2

Repair the open or poor connection in CKT 39.

Is the repair complete?

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System OK

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1. If the vehicle is equipped with DID, skip to Step 5.
2. Using a DMM, measure voltage between the trip calculator terminal A1 and ground.

Is the voltage measured within the specified value

B+

Go to Step 5

Go to Step 4

Repair the open or poor connection in CKT 640.

Is the repair complete?

--

System OK

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Using a DMM, measure resistance between the following locations:

1. Trip calculator: terminals B4, B5 and ground
2. DID: terminal O and ground

Is the measured resistance less than the specified value?

2 ohms

Go to Step 7

Go to Step 6

Repair the open or poor connection in CKT 1450 and/or CKT 1550.

Is the repair complete?

--

System OK

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1. Inspect for a poor connection at the trip computer/DID.
2. If the connection is OK, replace the trip calculator/DID. Refer to Driver Information Center Module Replacement .

Is the repair complete?

--

System OK

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