Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is obtained:
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Check voltage supply of throttle valve control module and wiring to control module.
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Check Throttle Position (TP) Sensor -G79- and Sender -2- for accelerator pedal position -G185-. See: Computers and Control Systems/Sensors
and Switches - Computers and Control Systems/Throttle Position Sensor/Testing and Inspection
If voltage supply and wires are OK:
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Replace Motronic Engine Control Module (ECM) -J220-.
Checking voltage supply and wiring to control module
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Connect multimeter to connector terminals 2 + 6 for voltage measurement.
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Switch ignition on.
Specified value: at least 4.5 V
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Switch ignition off.
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Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Test
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Check wires between test box and 6-pin connector for open circuit according to wiring diagram:
Terminal 1 + socket 92
Terminal 2 + socket 83
Terminal 3 + socket 117
Terminal 4 + socket 84
Terminal 5 + socket 118
Terminal 6 + socket 91
Wire resistance: max: 1.5 Ohms
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Also check wires for short circuits to each other, to vehicle Ground (GND) and to B+.
Specified value: Infinity Ohms
If no malfunctions are found in wires:
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Check voltage supply of Engine Control Module (ECM). See: Engine Control Module/Testing and Inspection/Engine Control Module (ECM)
Voltage Supply, Checking/With Generic Scan Tool
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
With Manufacturer's Scan Tool