GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Catera 🢒 Body and Accessories 🢒 Cruise Control 🢒 Cruise Control Inoperative

Step

Action

Value(s)

Yes

No

1

Inspect the CRUISE fuse for an open.

Is the fuse open?

--

Go to Step 2

Go to Step 3

2
  1. Test the circuits from the CRUISE fuse for a short to ground.
  2. Replace the fuse after repairing the condition.

Did you find and correct the condition?

--

Go to Step 4

--

3
  1. Install a scan tool.
  2. Select CRUISE CONTROL and then SPECIAL FUNCTIONS.
  3. Turn ON the ignition, with the engine OFF.
  4. Select STEPPER MOTOR TEST.
  5. Observe the throttle and actuate the stepper motor with the scan tool.

Does the throttle move to the wide open position?

--

Go to Step 5

Go to Step 6

4

Verify that the cruise control system operates properly.

Does the cruise control system operate properly?

--

System OK

Go to Step 3

5
  1. Select TIP SWITCH I from the scan tool data list.
  2. Press and hold the SET/ACCEL button on the cruise control switch.

Does the scan tool display ACTIVE?

--

Go to Step 7

Go to Step 8

6

Access DTCs using the scan tool.

Is a DTC 55 present?

--

Go to Step 9

Go to Step 10

7
  1. Select BRAKE/P-N SWITCH from the data list.
  2. Move the transmission selector to the D position.
  3. Do not press on the brake pedal.

Does the scan tool display INACTIVE?

--

Go to Step 11

Go to Step 12

8
  1. Disconnect the cruise control switch connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Connect a fused jumper wire from terminal B to terminal D.

Does the scan tool display ACTIVE?

--

Go to Step 13

Go to Step 14

9

Replace the cruise control module.

Is the replacement complete?

--

Go to Cruise Control System Check

--

10

Inspect the cruise control cable for the following:

    • a binding condition
    • cable moves freely
    • cable adjustment

Did you find and correct the condition?

--

Go to Cruise Control System Check

Go to Step 9

11

Select TIP SWITCH O from the scan tool data list.

Does the scan tool display INACTIVE?

--

Go to Step 15

Go to Step 16

12
  1. Disconnect the cruise control release switch connector.
  2. Connect a fused jumper wire across terminals 1 and 2.
  3. Make sure the transmission is in the D position and brake pedal not applied.

Does the scan tool display INACTIVE?

--

Go to Step 17

Go to Step 18

13

Replace the cruise control switch.

Is the replacement complete?

--

Go to Cruise Control System Check

--

14

Test for an open circuit in CKT FB300 (BLK/YEL).

Did you find and correct the condition?

--

Go to Step 19

Go to Step 9

15
  1. Select BRAKE SWITCH from the data list.
  2. Apply the brake pedal.

Does the scan tool display APPLIED?

--

Go to Step 20

Go to Step 21

16
  1. Disconnect the cruise control switch connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Connect a fused jumper wire from terminal B to terminal A.

Does the scan tool display INACTIVE?

--

Go to Step 13

Go to Step 22

17

Replace the cruise control release switch.

Is the replacement complete?

--

Go to Step 19

--

18
  1. Test for an open circuit between terminal C of the automatic transmission range switch and cruise control module connector terminal D.
  2. If no circuit problem is found, test the operation of the range switch, repair as necessary.

Did you find and correct the condition?

--

Go to Step 19

--

19

Verify that the cruise control sets and maintains set speed.

Does the cruise control set and maintain set speed?

--

System OK

Go to Step 9

20
  1. Prepare the vehicle for a road test.
  2. Select VEHICLE SPEED.
  3. Road test the vehicle and observe vehicle speed on the scan tool.

Does the scan tool display the vehicle speed?

--

Go to Step 19

Go to Step 23

21
  1. Apply the brake pedal.
  2. Observe the exterior brake lamps.

Do the brake lamps illuminate?

--

Go to Step 24

Go to Step 25

22

Test for an open circuit in CKT FA300 (BLK/RED).

Did you find and correct the condition?

--

Go to Step 19

Go to Step 9

23

Test the VSS input circuit between the EBTCM connector terminal 23 and the cruise control module connector terminal K for the following:

    • open circuit
    • short to ground
    • short to voltage
    • If no circuit problems are found, test the VSS output from terminal 23 of the EBTCM, repair as necessary.

Did you find and correct the condition?

--

Go to Step 19

Go to Step 9

24

Test for an open circuit in CKT FB500 (BLK/YEL) between S206 and cruise control module connector terminal G.

Did you find and correct the condition?

--

Go to Step 19

Go to Step 9

25

Refer to the Stop Lamps Inoperative located in Lighting Systems for repair.

Did you find and correct the condition?

--

Go to Step 19

--