Golf L4-2.0L (AZG) (2004)
If indication remains at approx. -40 or -46°C:
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End diagnosis and switch ignition off.
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Check wires according to wiring diagram.
Continuation of test if indication is approx. 140°C:
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Disconnect 5-pin connector from Mass Air Flow (MAF) sensor -G70- with Intake Air Temperature (IAT) sensor -G42- (arrow).
If indication jumps to approx. -40 or -46°C:
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End diagnosis and switch ignition off.
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Replace Mass Air Flow (MAF) Sensor -G70-, item no. 3.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase
Diagnostic Data
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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes
If indication remains at approx. 140°C:
-
End diagnosis and switch ignition off.
-
Check wires according to wiring diagram.
Checking wiring
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Connect test box to control module wiring harness, connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box,
Connecting For Wiring Test
Vehicles with engine code AEG
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Check wires between test box and 5-pin connector for open circuit according to wiring diagram.
Terminal 1 + socket 40
Terminal 3 + socket 12
Wire resistance: max: 1.5 Ohms
Vehicles with engine code AVH, AZG