Beetle L4-1.9L DSL Turbo (ALH) (1998)
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Connect VAG1598/21 -1- test box to ABS control module wiring harness -2-.
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Check CAN-Bus wires between test box sockets 1598/22 and 1598/21 for open circuit according to wiring diagram:
Socket 68 (1598/22) and Socket 10 (1598/21)
Socket 75 (1598/22) and Socket 11 (1598/21)
Wire resistance: max. 1.5 ohms
Vehicles with 121-pin control module
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Connect test box to control module for Diesel- Direct fuel injection system, connect test box for wiring test. During this, wiring harness to Engine
Control Module (ECM) is not connected. See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool
Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring Test
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Check the central terminal resistance in control module for Diesel-Direct fuel injection system:
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To do this, measure resistance between test box
sockets 6 +7.
Specified value: 60...72 ohms
If resistance value is not in specified range:
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Replace Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-.
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If resistance value is in specified range:
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Remove test box from control module for Diesel- Direct fuel injection system.
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Connect test box to control module wiring harness.
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Check CAN data bus wires for short circuit to each other.
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To do this, perform a resistance measurement anew between test box sockets 58 + 60:
Specified value: Infinite Ohms
If specified value is obtained (wires have no short circuit to each other):
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Eliminate error in wires according to wiring diagram.