Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Continuity Test Procedure (1987-88)
The continuity procedure and instructions must be followed precisely to prevent damage occurring to any of fuel system components. To enable tests to be carried out when 40-pin connector is connected to Engine Control Module (ECM), it is necessary to remove two screws securing shroud to connector to enable multimeter probes to be inserted into back of appropriate pin.
- Remove ECM, and harness connector from beneath front right seat, access is gained through rear opening of seat base.
- Remove connector shroud and maneuver it along harness until there is enough clearance enabling meter probes to be inserted into back of connector.
- There are 4 pin numbers (1, 13, 28, 40) molded onto rear of connector for pin position identification. See Fig 1 . Pins 1 to 13 top row. Pins 14 to 27 center row (Pin 14 is below pin 13 but is not identified on rear of connector). Pins 28 to 40 bottom row. Pin wire colors are identified in ENGINE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (1987-88) table.
| Pin Number | (1) Wire Color | ||
|---|---|---|---|
| 1 | Red/Green | ||
| 2 | Brown/Orange | ||
| 3 | Yellow | ||
| 4 | Black | ||
| 5 | Brown/Purple | ||
| 6 | Yellow | ||
| 7 | Green/Blue | ||
| 8 | Not Used | ||
| 9 | White/Light Green | ||
| 10 | Black/Yellow | ||
| 11 | Yellow/White | ||
| 12 | Blue/Red | ||
| 13 | Yellow/Blue | ||
| 14 | Black | ||
| 15 | Brown | ||
| 16 | Blue/Purple | ||
| 17 | Not Used | ||
| 18 | White/Pink | ||
| 19 | White/Gray | ||
| 20 | Red | ||
| 21 | Yellow/Blue | ||
| 22 | Blue/Red | ||
| 23 | Blue | ||
| 24 | Blue | ||
| 25 | Red/Black | ||
| 26 | Green/White | ||
| 27 | Black/Gray | ||
| 28 | Blue/Gray | ||
| 29 | Orange | ||
| 30 | Not Used | ||
| 31 | Not Used | ||
| 32 | Gray/White | ||
| 33 | Not Used | ||
| 34 | Black/Orange | ||
| 35 | Blue/Green | ||
| 36 | Not Used | ||
| 37 | White/Yellow | ||
| 38 | Not Used | ||
| 39 | White/Black | ||
| 40 | Black | ||
|
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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