Golf GTI L4-1984cc 2.0L DOHC (9A) (1990)
Engine Control Module: All Technical Service Bulletins
Tools - VAG 1598 Test Box Description, Application List
GROUP
D2
NUMBER
90-01 March 31, 1990
MODEL(S):
All models since 1984
SUBJECT:
VAG 1598 Test box description, connecting and application list
Description
The VAG 1598 test box and adaptor set was introduced in July of 1989. It consists of a main harness with test box (that universally connects to all of the
adaptor harnesses) and a set of adaptor harnesses. A hardshell storage case is provided to protect the set when not in use.
The VAG 1598 is used in conjunction with several other pieces of test equipment consisting of:
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VAG 1526 (US 1119) multimeter
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VAG 1527A (US 1115) LED tester
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VW 1594 adaptor kit
Note
New adaptor harnesses will be made available for the VAG 1598 in the future as new applications require them.
VAG 1598 advantages:
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the fragile terminals in the control unit connector no longer risk damage from test leads and probe connections. Connections formerly made
on the control unit connector are now made on the VAG 1598 test box which has large conveniently accessible terminals
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raised, highly visible numbers on the test box eliminate any uncertainty as to connector terminal numbering
VAG 1598 Advantages continued
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certain components (e.g. Hall sender) can now be checked dynamically (engine running)
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electrically checking miniature and unusual size terminals is now made possible regardless of terminal size
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standard sized adaptors are used to make and test all connections resulting in dependable, accurate measurements
VAG 1598 Test box, connecting
Example:
Digifant Fuel/Ignition system control unit
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select the appropriate adaptor harness from the list (based on the connector you wish to connect to) for this example use adaptor harness VAG
1598/2
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connect adaptor harness VAG 1598/2 to main test box harness by joining the two rectangular connectors, then tighten via knobs on main harness
connector