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.
Retrieving Codes
1994 Volvo 940 Base, 4D Sedan, AW71SECTION Retrieving Codes
- Locate diagnostic unit, and remove its cover. Connect selector cable to socket No. 6. Turn ignition switch to ON position. Enter control function No. 1 (retrieving codes) by pressing push button one time for at least one second and no more than 3 seconds.
- Watch Red LED, and count number of flashes in 3-flash series. Flash series are separated by 3-second intervals. See Figure . Note all codes. Only 3 separate codes can be stored at once. If no codes are stored, LED will flash a 1-1-1 to indicate ignition system is operating properly.
- If a fault code is received, see IGNITION SYSTEM FAULT CODES table. Depress push button again, and check for additional codes. Depress push button a third time if necessary. If first code repeats, no other codes are present.
- Diagnostic system memory is full when 3 codes are present. Those codes must be repaired before further codes can be retrieved.
NOTE:
Not all codes listed in IGNITION SYSTEM FAULT CODES
table are used on every vehicle.
RENDER: 1.0x
NO RELATED
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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.