Beetle L4-1.9L DSL Turbo (ALH) (1998)
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Connect VAG1598/21 test box -1- to ABS control module wiring harness -2-.
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Check terminal resistor in Engine Control Module (ECM) by performing resistance measurement between test box sockets 10 + 11.
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Specified value: 115 to 135 W
If the resistance value is outside the specified range:
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Replace Engine Control Module (ECM).
If the resistance value is within the specified range:
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Check CAN-Bus wiring using wiring diagram.
With Generic Scan Tool
Terminal resistance for CAN-Bus, checking
Function
Control module for Diesel-Direct fuel injection system communicates with other CAN-Bus capable control modules.
The databus-capable control modules are connected via two databus wires which are twisted together (CAN_High and CAN_Low), and exchange
information (messages). Missing information on the data bus is recognized as an error by both the control module for Diesel-Direct fuel injection system
and by other CAN-Bus control modules.
Trouble-free operation of the CAN-Bus requires that it have a terminal resistance. This central terminal resistance is located in control module for
Diesel-Direct fuel injection system.
Recommended special tools and equipment
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V.A.G 1598/18 Adapter - 68-pin (vehicles with 80-pin control module and autom. transmission)
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V.A.G 1598/21 Adapter for V.A.G 1598 (25-pin) (vehicles with 80-pin control module and manual transmission)
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VAG1526 multimeter or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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DTC "P0600 Serial Communication Link" was detected by the control module for Diesel-Direct fuel injection system, Diagnostic mode 3: Check
DTC memory. See: Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 3: Check DTC Memory
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Ignition switched off.
Test sequence
Vehicles with 80-pin control module and manual transmission
Vehicles with 80-pin control module and autom. transmission.
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Remove air filter housing.