A4 Quattro Sedan V6-2.8L (ACK) (1997)
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Carry out adaptation of throttle valve control module to ECM.
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Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.
Evaluation of display group 3
Checking wiring
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Connect VAG 1598/22 test box to ECM harness connector.
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Connect multimeter US1119 (Fluke 83 or equivalent), using adapter cables from VW1594 connector test kit.
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Measure resistance to check for short circuit between test box sockets 2 (Ground) and 75 (signal wire).
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Test box sockets 2 and 75
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Specified value: Infinity ohms
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Switch multimeter to voltage (20 VDC) measuring range.
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Switch ignition on.
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Check wiring for short circuit to B+.
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Note voltage reading if applicable (if not 0 volts).
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Switch ignition off.
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Continue test, depending on whether or not voltage was measured.
Continuation (with measured voltage)
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Disconnect 8-pin harness connector from throttle valve control module -J338-.
If measured voltage was approx. 5 volts:
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Connect multimeter US1119 (Fluke 83 or equivalent), using adapter cables from VW1594 connector test kit.
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Measure resistance to check for short circuit between test box sockets 62 (power supply) and 75 (signal wire).
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Test box sockets 62 and 75
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Specified value: Infinity ohms
If measured voltage was approx. battery positive voltage (B+):
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Check wiring at 8-pin connector, terminal 5 for short circuit to battery B+.
Continuation (with no measured voltage)
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Disconnect 8-pin harness connector from throttle valve control module -J338-.
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Check wiring for open circuit between ECM/test box and 8-pin harness connector.
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Connector terminal 5 to ECM/test box socket 75
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Specified value: max. 1.5 ohms
If wiring is OK:
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Replace throttle valve control module -J338-.
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Carry out adaptation of throttle valve control module to ECM.
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Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.