S6 Wagon L5-2226cc 2.22L DOHC Turbo (AAN) (1995)
Engine Control Module Harness Connector
6-Pin Connector
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Locate and repair open in circuit between terminal 37 of ECM harness connector, and terminal 5 of MAF sensor connector.
If not:
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Replace ECM.
Checking power supply from the Fuel Pump relay
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Connect LED tester between MAF sensor terminal 5 and engine Ground (GND).
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Switch ignition ON and operate starter for a few seconds.
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LED tester must light up when ignition is switched ON and during starter operation.
If LED tester goes out during starter operation:
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Verify that injector valve circuit breaker - S72 is OK.
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Check continuity between: terminal 5 of sensor connector, and injector valve circuit breaker - S72, using wiring diagram.
^
Must be 0.5 ohm maximum.
Central Electric Panel With Detail Of Relay Position 6
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Check continuity between: injector valve circuit breaker - S72 and terminal 31 of fuel pump relay - J17, relay location 6, using wiring diagram.
^
Must be 0.5 ohm maximum.
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Check fuel pump relay and if necessary, check control signal to fuel pump relay.
Checking MAF sensor wiring
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Connect VAG 1598 test box with VAG 1598/5 adapter harness to engine wiring harness. Refer to VAG 1598 Pin Out Box Connecting See:
Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Scan
Tool Connecting and Initial Checks/Connecting and Testing VAG 1598 Pin Out Box
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ECM remains disconnected.
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Disconnect MAF sensor harness connector.
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Using wiring diagram, check following circuits for continuity or shorts, by testing at terminals indicated:
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MAF harness connector terminal number 2 to test box socket number 26.
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MAF harness connector terminal number 3 to test box socket number 7.
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MAF harness connector terminal number 4 to test box socket number 25.
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Must be 1.0 ohms maximum.
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Repair open or short circuits as necessary, using wiring diagram.
Note: Use only gold replacement terminals when making repairs to MAF sensor connector.
Checking MAF sensor function