Electrical - Possible Cause of No Start
NO.: TSB-92-54-007DATE: December, 1992
MODEL: 1991-92 3000GT
SUBJECT:
NO-START CONDITION
PURPOSE
This bulletin provides information on the cause and correction of a possible no-start condition on 1991 and 1992 3000GTs produced before July 1, 1992.
DESCRIPTION
If a 1991 or 1992 3000GT cranks but does not start, the cause may be traced to corrosion in two wires of the A-67 connector. As indicated, the 12-pin A-67 connector is located behind the right-side headlight, next to the main relay junction box.
The remainder of this bulletin describes the A-67 connector wire identification/location and the wire repair procedure. Parts and warranty information can be found in this bulletin.
There are two wires in the A-67 connector subject to corrosion. One is the 0.5 BW (black wire with white tracer). The other is the 1.25 RB (red wire with black tracer). These two wires are located in the A-67 connector as shown.
WIRE REPAIR PROCEDURE
1. Record the radio presets, then, disconnect the negative battery terminal.
2. Loosen the air flow sensor rear clamp and the four air filter clips. Remove the air flow sensor wiring harness, air flow sensor housing, and air filter.
3. Remove the two 10 mm bolts and one 10 mm nut holding the air filter base. Remove the air filter base. The A-67 connector is now accessible.
4. Disconnect the A-67 connector and locate the BW wire and RB wire. Refer to the wire identification illustration.
5. Cut the BW and RB wires, leaving about 3/8" wire on both sides of the connector.
6. Re-connect the BW and RB wires using a commercially available, high quality, waterproof, 2-pin connector.
For best results, solder each wire to its terminal, and crimp the terminal's metal tabs onto the wire's insulation before inserting the wire into the 2-pin connector.
CAUTION:
To prevent additional corrosion in the two wires, DO NOT join them with wire nuts, butt connectors, or tape. A waterproof, 2-pin connector must be used.
7. Before re-connecting the A-67 connector, clean out each terminal end using a point cleaner. To prevent future corrosion in the connector, insulate the two cut wire ends with silicone sealant and electrician's tape.
After cleaning the terminal ends and insulating the two wire ends, re-connect the A-67 connector.
8. Install the air filter base, air filter, and sensor housing. Re-connect the air flow sensor wiring harness, tighten the air flow sensor rear clamp, and secure the air filter clips.
9. Re-connect the negative battery terminal, set the clock and radio, and verify that the vehicle starts/runs normally.
PARTS INFORMATION
The 2-pin, waterproof connectors are not available from Mitsubishi Motors. Obtain the connectors from a reputable electronics supplier.
WARRANTY INFORMATION
Position Code: 543530
Labor Operation Code: 543530 00
Labor Time Allowance: 0.2 hrs.
Use normal warranty procedures.