Ignition Switch Cannot Be Set Correctly. Pontiac Grand Prix 1999

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 1999 🢒 Grand Prix 🢒 Steering 🢒 Steering Wheel and Column - Tilt 🢒 Ignition Switch Cannot Be Set Correctly

Table 1:

Ignition Key Can Be Turned to the LOCK Position with the Transaxle Range Switch Out of Park

Problem	Action
The actuator rod is damaged.	Replace the rod as needed.
The sector to the rack is engaged in the incorrect tooth.	Inspect the components. Service the components as needed. Reassemble the components
The switch is faulty.	Replace the switch.

Ignition Key Can Be Turned to the LOCK Position with the Transaxle Range Switch Out of Park

Step	Action	Value(s)	Yes	No
1	Verify that the vehicle is in the PARK position. Turn the ignition switch to the LOCK position. Use a test lamp in order to backprobe between the automatic transaxle control connector terminal C and ground. Did the test lamp light?	--	Go to Step 2	Go to Step 3
2	Disconnect the automatic transaxle control electrical connector. Verify that the test lamp is in the same position. Did the test lamp light?	--	Go to Step 4	Go to Step 5
3	Replace the steering column electric park lock. Refer to Electronic Column Lock Module - Assemble - Off Vehicle . Inspect the steering column electric park lock system. Is the repair complete?	--	System OK	--
4	Repair a short to B+ in CKT 1630. Inspect the steering column electric park lock system. Is the repair complete?	--	System OK	--
5	Inspect the automatic transmission shift lock actuator for mechanical damage. Refer Electronic Column Lock Module - Assemble - Off Vehicle . Replace the automatic transmission shift lock control actuator if the automatic transmission shift lock control actuator is not damaged. Inspect the steering column electric park lock system. Is the repair complete?	--	System OK	--

Ignition Key Cannot Turn to the LOCK Position with the Transaxle Range Switch in the Park Position

Step

Action

Value(s)

Yes

Verify that the vehicle is in the park position.
Turn the ignition switch to the RUN position.
Use a test lamp in order to backprobe between the automatic transaxle control connector terminal F and ground.

Did the test lamp light?

Go to Step 2

Go to Step 3

Use a test lamp in order to backprobe between the automatic transaxle control connector terminal C and ground.

Did the test lamp light?

Go to Step 4

Go to Step 5

Repair the following conditions in CKT 1020 between the automatic transaxle control connector terminal F and S 376:

•	A poor connection

•

An open

Inspect the automatic transaxle control system.

Is the repair complete?

System OK

Use a test lamp in order to backprobe between the steering column electric park lock connector terminal A and ground.

Did the test lamp light?

Go to Step 6

Go to Step 7

Inspect the automatic transmission shift lock control actuator for mechanical damage. Refer to Electronic Column Lock Module - Assemble - Off Vehicle .
Replace the automatic transmission shift lock control actuator if the automatic transmission shift lock control actuator is not damaged.
Inspect the automatic transmission shift lock control system.

Is the repair complete?

System OK

Use a test light in order to backprobe between the following steering column electric park lock connector terminals:

•	Terminal A

•	Terminal B

Did the test lamp light?

Go to Step 8

Go to Step 9

Repair the following conditions in the circuit:

•	A poor connection

•

An open

Inspect the automatic transmission shift lock control system.

Is the repair complete?

System OK

Replace the steering column electric park lock. Refer to Electronic Column Lock Module - Assemble - Off Vehicle .
Inspect the automatic transmission shift lock control system.

Is the repair complete?

System OK

Repair the following conditions in CKT 150 between the steering column electric park lock connector terminal B and ground:

•	A poor condition

•

An open

Inspect the automatic transmission shift lock control system.

Is the repair complete?

System OK