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.
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HOMESERVICE MANUALSVOLKSWAGEN1991JETTA L4-1984CC 2.0L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSRECALLSRECALL - REVISED VEHICLE SYSTEM WORK PROCEDURESWORK PROCEDUREH. CHECK/REPLACE ENGINE CONTROL MODULE
1991 Volkswagen Jetta L4-1984cc 2.0L DOHC
H. Check/Replace Engine Control Module
1991 Volkswagen Jetta L4-1984cc 2.0L DOHCSECTION H. Check/Replace Engine Control Module
H. Check/replace Engine Control Module
(ECM) (Passat with automatic transmission only)
- Connect Engine Scan Tool VAG 1551 and check Part No. of installed engine ECM. Also visually check ECM for color code.
Note
Since tester printouts tend to fade, make a photocopy of the printout and attach to repair order hard copy for future reference. Identify removed Engine Control Modules (ECM) with a completely filled out Warranty parts tag and return ECM to your Parts Department for shipment to VWoA Warranty Parts Test Center.
(ECM) (Passat with automatic transmission only)
- Connect Engine Scan Tool VAG 1551 and check Part No. of installed engine ECM. Also visually check ECM for color code.
Note
Since tester printouts tend to fade, make a photocopy of the printout and attach to repair order hard copy for future reference. Identify removed Engine Control Modules (ECM) with a completely filled out Warranty parts tag and return ECM to your Parts Department for shipment to VWoA Warranty Parts Test Center.
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.