Ignition System - Flashing MIL Lamp
89saab07FILE IN VOL.
S.I. Man. I
SEC. PG.
A-3 116
Figure 1:
Subject: Intermittent Flashing of "Check Engine" Light Issue: 10/89-1181
Application: 1989 900 and 900S Only
Some 1989 900 and 900S models may experience a sporadic flashing of the "Check Engine" light. If this occurs, follow the fault tracing procedures in section 3:2 of the 1989-900 Service Manual and in the M89 900 News Book to identify the flashing codes. Also, retrieve the fault codes in the LH ECU as outlined in the News Book.
If no faults are found and there are no driveability problems, the flashing light may be related to the EZK ignition system. Check the date code on the EZK ECU (Figure 1) . If the date code is 945 or below, the flashing light may be attributed to a programming sequence in the EZK control unit that has since been modified.
Disconnecting wire 655A, as outlined in the procedure below, will have no adverse affect on the EZK system, nor will it affect the LH fuel injection system diagnostic functions or the ability to register an LH fault via the "Check Engine" light. The fault tracing of the EZK ignition with the EZK Tester is also not affected. It will however, cause the "Check Engine" light to no longer respond to EZK fault codes.
NOTE
Use the wiring diagrams in the service manual to assist with component locations.
1. Locate the six-pole connector (67) on the right side of the engine bay, near the fresh air intake. There are two six-pin connectors in this area. The one in question has a yellow wire in position 1.
2. Unplug the connector. Open one side of the connector from the back and remove the yellow wire from position 1. Insulate the loose end. Reconnect the plug, but leave the insulated yellow wire out.
3. Road test the car to verify that the "Check Engine" light no longer flashes while driving.
WARRANTY INFORMATION: For warranty repairs, use failure coding 34030-68-01-01-05. Labor time allowance is 0.4 hour (checking fault codes and removing the wire) which is entered as straight time.