GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the driver information system operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms - Driver Information System

2

Verify that the driver information display module always reads SC.

Does the driver information system operate normally?

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Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Disconnect the ambient air temperature sensor.
  2. Turn the ignition switch to the RUN position.

Does the driver information display module display SC?

--

Go to Step 4

Go to Step 9

4

  1. Turn the ignition switch to the OFF position.
  2. Connect a J 39200 digital multimeter (DMM) from the DIC connector C1, terminal 8 to ground.
  3. Disconnect the driver infomation display module.
  4. Backprobe the driver information display module harness connector. Refer to Circuit Testing in Wiring Systems

Does CKT 735 (LT GRN/BLK) show a value within the specified range?

0-3 ohms

Go to Step 5

Go to Step 6

5

Repair the short to ground in CKT 735 (LT GRN/BLK) between the driver information display module connector terminal 8 and the ambient air sensor terminal B. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 12

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6

Inspect the driver information display module connector for a poor connection.

Are the connections OK?

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Go to Step 8

Go to Step 7

7

Repair the driver information display module connections as necessary. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 12

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8

Replace the driver information display module. Refer to Driver Information Center Module Replacement .

Is the repair complete?

--

Go to Step 12

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9

Inspect the ambient air temperature sensor connector for damage.

Is the connector damaged?

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Go to Step 10

Go to Step 11

10

Repair the ambient air temperature sensor connections as necessary. Refer to Connector Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 12

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11

Replace the ambient air temperature sensor. Refer to Ambient Air Temperature Sensor Replacement Sensor Replacement - Outside Air Temperature.

Is the repair complete?

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Go to Step 12

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12

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3