Passat L4-1.8L Turbo (AWM) (2004)
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Vehicles with engine code ATW, AUG, AWM
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Measure voltage supply between sockets 1 + 3 and 2 + 3 of test box.
Continued for all vehicles
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Switch ignition on.
Specified value: at least 11.5 V
If specified value is not obtained:
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Check wire connections to relay carrier and Ground (GND) connection of Engine Control Module (ECM) according to wiring diagram
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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
Control Module Voltage Supply Check
Voltage supply for control module, checking
Special tools and equipment
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V.A.G 1551 scan tool (or VAG 1552 mobile scan tool) with VAG 1551/3B cable
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VAG 1598/31 adapter cable
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VAG 1526 multimeter or VAG 1715 multi meter
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VAG 1594 connector test kit
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Wiring diagram
Test requirements
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Battery voltage must be at least 11.5 volts.
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Fuses no. 7 and 29 must be OK.
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Generator (GEN) must be OK, checking:
Test sequence
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Connect V.A.G 1551 scan tool (VAG 1552). Start engine and select the Engine Control Module (ECM) using address word 01. (connecting scan
tool and selecting ECM). Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1551 Scan Tool", See:
Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool
Connecting/With Manufacturer's Scan Tool/Connecting VAG 1551 Scan Tool
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Indicated on display:
Read measuring value block
HELP
