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 MANUALSVOLKSWAGEN1999GOLF (1J1) L4-1.9L DSL TURBO (ALH)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONREADING AND CLEARING DIAGNOSTIC TROUBLE CODESSCAN TOOL CONNECTINGWITH GENERIC SCAN TOOLTEST BOX, CONNECTING FOR WIRING TEST
1999 Volkswagen Golf (1J1) L4-1.9L DSL Turbo (ALH)
Test Box, Connecting For Wiring Test
1999 Volkswagen Golf (1J1) L4-1.9L DSL Turbo (ALH)SECTION Test Box, Connecting For Wiring Test
Connect Test Box For Wiring Test
Recommended special tools and equipment e.g.:
Vehicles with 80-pin control module
- VAG1598/22 test box
Vehicles with 121-pin control module
- VAG1598/31 test box
Continuation for all vehicles
Requirement
- Ignition switched off.
Work procedure
- Remove wiper arms and wind cowl.
- Then disengage connector from control module and disconnect.
Vehicles with 80-pin control module
- Connect VAG1598/22 test box at control module wiring harness.
Vehicles with 121-pin control module
- Connect VAG1598/31 test box at control module wiring harness. The control module for Diesel-Direct fuel injection system is not connected during this.
Continuation for all vehicles
When harness connectors are disconnected from the control module for Diesel-Direct fuel injection system or the battery is disconnected, all adaptation values in the control module are erased. DTC memory content will remain intact however. If the engine is started after this, rough, uneven idle can result. In this case, the readiness code must be generated again. Monitors, Trips, Drive Cycles and Readiness Codes
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.