Golf L4-1896cc 1.9L DSL Turbo (1Z) (1997)
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Disconnect fuel temperature sensor harness connector (connection to fuel pump Quantity Adjuster)
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Measure resistance between connector terminals: 1 + 2 and 2 + 3
Specification: 5 to 7 Ohms
If specification not obtained:
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Replace injection pump
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Display the readiness code
If DTC memory was erased:
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Create readiness code again
If specification obtained:
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Connect VAG 1598/18 Test Box to ECM harness connector
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Check wiring for open circuit between Test Box and connector using wiring diagram:
terminal 1 + socket 29
terminal 2 + socket 7
terminal 3 + socket 52
Wire resistance: max. 1.5 Ohms.
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Additionally check wires for short to one another.
Specification: Infinite Ohms
If wiring OK:
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Replace Diesel direct injection system ECM J248
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Display the readiness code
If DTC memory was erased:
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Create readiness code again
Quantity Adjuster N146 Checking: