Jetta GLS V6-2.8L (AFP) (2002)
and Repair
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Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
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Display readiness code.
If the DTC memory has been erased or the ECM was disconnected from permanent battery (B+) voltage, the readiness code must be generated again.
If the specification is obtained:
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Check wiring.
Checking wiring
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Remove wiper arms and plenum chamber cover.
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Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected by this action.
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Check wiring between test box and 3-pin harness connector for open circuit using wiring diagram.
-G61-: -G66-:
Terminal -1- + socket
106
107
Terminal -2- + socket
99
99
Terminal -3- + socket
108
108
Wire resistance: max. 1.5 ohms
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Also, check wires for short to one another.
Specified value: infinity ohms
If no wiring fault is detected:
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Loosen knock sensor and re-tighten to 20 Nm (15 ft lb).
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Perform road test again and check knock control specifications on display.