GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Century (China) (CNG) 🢒 Steering 🢒 Steering Wheel and Column - Tilt 🢒 Automatic Transmission Shift Lock Control Inoperative

Step

Action

Value(s)

Yes

No

Important: Use the J 35616-A in order to inspect or probe a terminal in a diagnostic procedure. Use of the J 35616-A ensures that following conditions exist:

   • No damage to the terminal will occur.
   • Terminal contact tension is sufficient.
Refer to Repairing Connector Terminals in Wiring Systems if terminal contact seems insufficient.

1
  1. Place transaxle in the PARK position.
  2. Turn ignition switch to the RUN position.
  3. Disconnect the automatic transaxle control (BTSI) connector.
  4. Using a test lamp, connect between the BTSI connector terminal A circuit 1135 and ground.
  5. Press the brake pedal and observe the test lamp.

Does the test lamp turn off when you press the brake pedal?

--

Go to Step 3

Go to Step 2

2

Disconnect the stop lamp switch connector C2. Leave the test lamp at the same location.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 7

3

Using a test lamp, connect between the automatic transaxle control (BTSI) connector terminal B circuit 434 and B+.

Does the test lamp illuminate?

--

Go to Step 4

Go to Step 5

4
  1. Disconnect the transaxle range switch connector C1.
  2. Using a test lamp, connect between the transaxle range switch connector C1 terminal D circuit 1050 and B+.

Does the test lamp illuminate?

--

Go to Step 13

Go to Step 12

5

Check for poor connection or open in circuit 434.

Is there a poor connection or open in circuit 434?

--

Go to Step 11

Go to Step 10

6

Repair the short to B+ in circuit 1135.

Is the repair complete?

--

Go to Automatic Transmission Shift Lock Control System Check

--

7

Using a test lamp, connect between the stop lamp switch connector terminal A circuit 1439 and ground.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 9

8

Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement for service procedure.

--

Go to Automatic Transmission Shift Lock Control System Check

--

9

Repair the poor connection or open in circuit 1439.

Is the repair complete?

--

Go to Automatic Transmission Shift Lock Control System Check

--

10

Replace the BTSI. Refer to Automatic Transmission Shift Lock Control Disassemble - Off Vehicle and Automatic Transmission Shift Lock Control Assemble - Off Vehicle for service procedure.

Is the repair complete?

--

Go to Automatic Transmission Shift Lock Control System Check

--

11

Repair the poor connection or open in circuit 434.

Is the repair complete?

--

Go to Automatic Transmission Shift Lock Control System Check

--

12

Repair the poor connection or open in circuit 1050.

Is the repair complete?

--

Go to Automatic Transmission Shift Lock Control System Check

--

13

Replace transaxle range switch. Refer to Park/Neutral Position Switch Replacement for service procedure.

Is the repair complete?

--

Go to Automatic Transmission Shift Lock Control System Check

--