GM Service Manual Online
For 1990-2009 cars only

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. If either the tilt actuator or the telescope actuator displays Motor Current on the scan tool Data Display, as less than 0 amps and/or more than 10 amps in this step, go to the applicable chart for that actuator being Inoperative.

Step

Action

Value(s)

Yes

No

DEFINITION: This test applies to a tilt/telescoping steering column that has no movement at all.

1

Did you perform the Tilt/Telescoping Steering Column Diagnostic System Check?

--

Go to Step 2

Go to Tilt/Telescoping Steering Column Diagnostic System Check

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Observe the Telescope/Tilt Switch parameter in the Tilt/Telescope Module Data Display list while activating the tilt/telescoping manual switch from the Idle position to the Up, Down, In, and Out positions.

Do the parameters change state as expected?

--

Go to Step 3

Go to Step 9

3

Test the Power T&T fuse for an open.

Is the Power T&T fuse OK?

--

Go to Step 4

Go to Step 6

4

  1. Turn OFF the ignition.
  2. Disconnnect the tilt/telescoping steering column module connector that contains both battery positive circuits and the ground circuit.
  3. Test both battery positive circuits for an open or a high resistance.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 5

5

Test the ground circuit for an open or high resistance.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 13

6

  1. Turn OFF the ignition.
  2. Disconnect the tilt/telescoping steering column module connector that contains both battery positive circuits and the ground circuit.
  3. Test the battery positive circuit that includes the Power T&T fuse for a short to ground.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 7

7

  1. Disconnect both the tilt actuator and the telescope actuator harness connectors from the steering column module.
  2. Replace the Power T&T fuse.
  3. Reconnect one of the actuators.
  4. Using the power tilt/telescoping steering column switch, operate the power tilt and telescoping to all positions.

Did the Power T&T fuse open again?

--

Go to Step 11

Go to Step 8

8

  1. Reconnect the actuator that has not yet been reconnected.
  2. Using the power tilt/telescoping steering column switch, operate the power tilt and telescoping to all positions.

Did the Power T&T fuse open again?

--

Go to Step 11

Go to Step ???????

9

Inspect for poor connections/terminal tension at the tilt/telescoping steering column switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 12

10

Inspect for poor connections/terminal tension at the harness connector of the steering column actuator that caused the fuse to open. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 13

11

Inspect for poor connections/terminal tension at the tilt/telescoping steering column module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 14

12

Important: Perform the set up procedure for the tilt/telescoping steering column control module.

Replace the tilt/telescoping steering column switch. Refer to Steering Column Tilt Wheel and Telescope Switch Replacement .

Did you complete the replacement?

--

Go to Step 15

--

13

Important: Perform the set up procedure for the tilt/telescoping steering column control module.

Replace the steering column actuator that caused the fuse to open. Refer to Tilt Motor Assembly - Disassemble - Off Vehicle or Telescope Motor Assembly - Disassemble - Off Vehicle .

Did you complete the replacement?

--

Go to Step 15

--

14

Important: Perform the set up procedure for the tilt/telescoping steering column control module.

Replace the tilt/telescoping steering column control module. Refer to Steering Column Control Module Replacement .

Did you complete the replacement?

--

Go to Step 15

--

15

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2