Fuel and Ignition System - Electrical Testing
GROUP: D2NUMBER: 91-01
DATE: August 31, 1991
SUBJECT:
Electrical Troubleshooting Steps
MODEL(S):
100, 200 with NF Engine m.y. 1989-1991
CIS-E III FUEL AND IGNITION SYSTEM, ELECTRICAL TESTING
^ perform all measurements using the Fluke 83 multimeter (US 1119) or equivalent
^ The specified values given in the procedures are valid within a temperature range of 0° and + 40°C (32° and 104° F).
^ If the measured values deviate from the specified values; check the wiring and connectors using the wiring diagram before replacing any components.
CAUTION
Always switch the multimeter to the desired units and range of measurement (Volts, Ohms, etc.) before making any test connections to the system.
^ use the US 1115 LED tester (VAG 1527B) to indicate voltage presence as indicated in the procedures
^ always use the VW 1594 adaptor kit to make connections between the test instruments (Fluke 83 and US 1115 LED tester) and the test point
^ use Test box VAG 1598 and adaptor wire kit VW 1594 to make all test connections to the control unit
CAUTION
Do not connect or disconnect adaptors/test instruments to the VAG 1598 Test box while the ignition is switched ON.
REQUIREMENTS
^ Battery voltage OK
^ Fuses OK
^ System grounds OK
^ Power output stage of coil disconnected
^ switch OFF ignition
^ disconnect CIS-E III fuel injection control unit (J 21) harness connector
^ connect VAG 1598 Test box to control unit harness connector using adaptor cable
VAG 1598/3
^ control unit is not connected
^ make connections on the VAG 1598 Test box as indicated in the following procedures
Note
The checks illustrated apply to the (J 21) CIS-E III fuel injection control unit.
Note
The following electrical checks apply to the (J 154) CIS-E III ignition control unit.