Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1989 Oldsmobile Toronado V6-3800 3.8LFACTORY OEM SERVICE PROCEDURE
Left Door Is Open
Left Door Open Message:
Door Ajar Circuit:
DESCRIPTION:
The BCM provides system voltage to the left door ajar circuit, and the left door ajar switch provides the single path to ground. The BCM supplies and internally monitors the voltage level of the circuit at pin 3C12. When the left door ajar circuit is open the BCM will detect system voltage, but if the left door ajar switch provides a path to ground (left door open), the BCM will detect the circuit has been grounded. Once the BCM has determined that all of the failure conditions have been met, it will send the "LEFT DOOR AJAR" message to the IPC. The BCM will also activate the slow paced chime on the chime module.
TEST CONDITIONS:
1. Code B334 is not set.
2. ECM UART data line is OK.
FAILURE CONDITIONS:
1. PRNDL is OK, (no code B127 set).
2. Engine is running.
3. Transmission not in Park or Neutral.
4. Left door ajar switch input is low.
5. Vehicle speed not over 5.0 mph.
6. Left door ajar failure code already set.
7. Left door ajar switch is closed.
ACTION TAKEN:
1. Display the "LEFT DOOR AJAR" message on the IPC.
2. Activate the slow chime.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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