GM Service Manual Online
For 1990-2009 cars only

Conditions for Setting the DTC

A driver select switch input error is detected when both switch inputs (connector pins C5 and C6) are grounded or both are open for more than 3.0 seconds consecutively. If a driver select switch input error is detected, the system will default to the Normal switch setting, activate both position L.E.D.s, and set code 33.

Action Taken When the DTC Sets

  1. Record driver select switch error.
  2. Turn on both L.E.D.s.
  3. Default to Touring setting until a valid switch input combination is detected.

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition OFF.
  2. Disconnect the control module.
  3. Place the driver select switch in the TOURING setting.
  4. Measure the resistance between pins C5 and ground of wiring harness connector.

Is the resistance greater than the specified value?

10 ohms

Go to Step 2

Go to Step 7

2

Check the resistance in circuit 1435 from the control module to the driver select switch.

Is the resistance greater than the specified value?

10 ohms

Go to Step 3

Go to Step 4

3

Repair the open circuit condition in circuit 1435.

Is the repair complete?

Go to RTD Diagnostic System Check

--

4

Check the resistance in the circuit from the drivers switch to ground.

Is the resistance greater than the specified value?

10 ohms

Go to Step 5

Go to Step 6

5

Repair the open circuit condition in circuit 1436.

Is the repair complete?

--

Go to RTD Diagnostic System Check

--

6

Replace the driver select switch.

Is the repair complete?

--

Go to RTD Diagnostic System Check

--

7

Measure the resistance between pins C6 and ground of wiring harness connector.

Is the resistance greater than the specified value?

500 ohms

Go to Step 8

Go to Step 16

8

Measure the resistance between pins C6 and D16 of wiring harness connector.

Is the resistance greater than the specified value?

500 ohms

Go to Step 10

Go to Step 9

9

Repair the short in circuit 1434.

Is the repair complete?

--

Go to RTD Diagnostic System Check

--

10

  1. Place the driver select switch in the PERFORM setting.
  2. Measure the resistance between pins C6 and ground of wiring harness connector.

Is the resistance greater than the specified value?

10 ohms

Go to Step 11

Go to Step 19

11

Check the resistance in circuit 1434 from the control module to the driver select switch.

Is the resistance greater than the specified value?

10 ohms

Go to Step 12

Go to Step 13

12

Repair the open in circuit 1434.

Is the repair complete?

--

Go to RTD Diagnostic System Check

--

13

Check the resistance in the circuit from driver select switch to ground.

Is the resistance greater than the specified value?

10 ohms

Go to Step 14

Go to Step 15

14

Repair the open in circuit 1436.

Is the repair complete?

--

Go to RTD Diagnostic System Check

--

15

Replace the driver select switch.

Is the replacement complete?

--

Go to RTD Diagnostic System Check

--

16

  1. Disconnect the driver select switch.
  2. Measure the resistance between pins C6 and ground of wiring harness connector.

Is the resistance greater than the specified value?

500 ohms

Go to Step 17

Go to Step 18

17

Replace the driver select switch.

Is the replacement complete?

--

Go to RTD Diagnostic System Check

--

18

Repair the short in circuit 1434.

Is the repair complete?

--

Go to RTD Diagnostic System Check

--

19

Measure the resistance between pins C5 and ground of the wiring harness connector.

Is the resistance greater than the specified value?

500 ohms

Go to Step 20

Go to Step 23

20

Measure the resistance between pins C5 and D16 of the wiring harness connector.

Is the resistance greater than the specified value?

500 ohms

Go to Step 21

Go to Step 22

21

Replace the control module. Refer to Electronic Suspension Control Module Replacement .

Is the replacement complete?

--

Go to RTD Diagnostic System Check

--

22

Repair the short in circuit 1435.

Is the repair complete?

--

Go to RTD Diagnostic System Check

--

23

  1. Disconnect the driver select switch.
  2. Measure the resistance between pins C5 and ground of wiring harness connector.

Is the resistance greater than the specified value?

500 ohms

Go to Step 24

Go to Step 25

24

Replace the driver select switch.

Is the replacement complete?

--

Go to RTD Diagnostic System Check

--

25

Repair the short in circuit 1435.

Is the repair complete?

--

Go to RTD Diagnostic System Check

--