Passat Wagon L4-1.9L DSL Turbo (AHU) (1997)
Specification, see diagram
Scale A snows resistance values for temperature range 0 to 50°C
Scale B the values for temperature range 50 to 100°C.
Examples:
^
30°C corresponds to a resistance of 1500 to 2000 Ohms
^
80°C corresponds to a resistance of 275 to 375 Ohms
If specification not obtained:
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Replace Engine Coolant Temperature sensor G62
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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 between Test Box and 4 pin harness connector for open circuit using wiring diagram:
terminal 1 + socket 33
terminal 3 + socket 14
Wire resistance: max. 1.5 Ohms
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In addition, check wires for shorting to one another:
Specification: Infinite Ohms
If wiring OK:
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Replace ECM J248
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Erase DTC memory
NOTE: Disconnecting the Engine Coolant Temperature sensor automatically generates a DTC which must be erased.