GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

The BCM does not sound the key in the ignition reminder when the driver's door is open, the key is fully inserted in the ignition switch cylinder, and the ignition switch is in the OFF or the UNLOCK position.

1

Was the Audible Warning System Check performed?

--

Go to Step 2

Go to Audible Warnings System Check

2

Was the BCM Diagnostic System Check performed?

--

Go to Step 3

Go to Diagnostic System Check - Body Control System in Body Control System

3

  1. Ensure that the IP dimmer switch is in the OFF position.
  2. Turn the ignition switch to the RUN position.
  3. Lower the driver's window in order to prevent a lockout.
  4. Close all of the vehicle doors.
  5. Open and close the driver's door while observing the courtesy lights.

Do the courtesy lights turn ON with the driver's door open?

--

Go to Step 4

Go to Step 8

4

  1. Ensure that the IP dimmer switch is in the OFF position.
  2. Ensure that all of the vehicle doors are closed.
  3. Turn the ignition switch from the RUN position to the LOCK/OFF position.
  4. Remove the key from the ignition key cylinder while observing the courtesy lights.

Do the courtesy lights turn ON when removing the key from the ignition switch?

--

Go to Step 5

Go to Step 7

5

  1. Connect a scan tool to the data link connector (DLC).
  2. Turn the ignition switch to the RUN position.
  3. Monitor the key in the switch input.

Does the scan tool indicate the key in input active using the ignition switch?

--

Go to Step 6

Go to Step 9

6

  1. Place the key in the ignition cylinder.
  2. Ensure that the ignition switch is in the LOCK position.
  3. Open and close the driver's door.

Does the BCM sound the key in the ignition reminder?

--

Go to Step 11

Go to Step 9

7

  1. Insert the key fully into the ignition switch.
  2. Using a test light, backprobe between the B+ and the BCM connector C1 terminal D1.

Does the test light illuminate?

--

Go to Step 5

Go to Step 10

8

Repair a poor connection or an open in circuit 80 or circuit 1550.

Is the repair complete?

--

Go to Step 11

--

9

Replace the ignition key alarm switch. Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column - Tilt.

Is the repair complete?

--

Go to Step 12

--

10

Replace the ignition key alarm switch. Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column - Tilt.

Is the repair complete?

--

Go to Step 12

--

11

The malfunction is not present at this time. Refer to Audible Warnings Circuit Description for additional information regarding the operation of the key in ignition reminder.

Is the repair complete?

--

Go to Step 12

--

12

  1. Turn the ignition switch to the LOCK position.
  2. Connect the connectors and reinstall the components that were removed.

Is the repair complete?

--

Go to Audible Warnings System Check

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