Description

Mitsubishi SPACE STAR Electrical Schematic – OEM Wiring Diagrams for the 2002 Model

If you’ve ever stared at a tangle of wires under the dash of a Mitsubishi SPACE STAR and wondered which pin feeds the fuel pump, you’re not alone. I’ve seen DIYers burn out ECUs because they guessed the wrong power source, and techs waste billable hours chasing a short that a factory schematic would have shown in five minutes. This is an original Electrical Schematic – not a redrawn aftermarket copy. It runs 94 pages and covers every circuit from the fuse block to the immobilizer. And yes, it includes the diesel variants, which most third-party manuals skip entirely.

This manual matches what I keep in my own bay. The paper is clean, the lines are unambiguous, and the joint connector notes are printed right on the diagram – not hidden in a footnote three sections away. If you work on Space Stars, you need this on your bench, not a PDF on your phone while crawling under the dash.

Fuse Box and Relay Layout

The first section after the joint connector page walks you through the power distribution system. Left-hand drive and right-hand drive vehicles get separate diagrams – I’ve seen too many problems where a tech missed that the RHD version routes the main fuse through a different junction block. The manual labels every relay and fuse position with its amp rating and function. No guessing which slot is the cooling fan relay because the markings on the box cover are worn off. Page 6 shows the L.H. drive power distribution; page 12 covers R.H. drive. Both are there.

94 Pages of Factory Wiring Data

Most aftermarket schematics cram four systems onto one page and call it ‘complete.’ This OEM book dedicates a full spread to each subsystem. The starting system (M/T) gets its own page. The MPI engine control system splits into four sub-sections: mechanical and automatic transmissions for gasoline, plus diesel Step II and Step III. That level of granularity means you can find the exact wire color and connector orientation for the crank sensor on a diesel Euro-III model without flipping through unrelated engine diagrams. The 94 pages are not filler – they are all specific to this chassis.

MPI Engine Control: Gasoline and Diesel Variants

Under the engine control system, you get separate diagrams for MPI-M/T (page 20), MPI-A/T (page 30), and then diesel Step II (page 40) and diesel Step III (page 42). Each includes the ECM pinout, injector circuits, and the oxygen sensor wiring. If you’re dealing with a no-start on a 2002 Space Star, start by checking the immobilizer circuit (page 88 for petrol, page 90 for diesel). But the engine control pages will show you where the ECM gets its ignition signal – and that’s where half the cranks-but-won’t-start issues live.

Trace the Starting System Circuit

Page 18 is the starting system for manual transmission vehicles. It shows the battery connection, the starter relay, the inhibitor switch (if equipped), and the solenoid. I’ve used this page to diagnose a slow crank that turned out to be a voltage drop across the starter relay contacts – the diagram pointed me to the correct test point without pulling the starter. For automatic transmissions, the INVECS-II 4A/T section (page 50) includes the transmission control unit wiring, which is critical if you’re chasing a ‘transmission fail’ light that actually comes from a bad speed sensor ground.

Does This Manual Cover the Immobilizer and Air Conditioning?

Yes. The immobilizer system is split into petrol-powered vehicles (page 88) and diesel-powered vehicles Step III (page 90). The manual air conditioner section (page 68) covers everything except diesel Euro-II vehicles – that one is a common blind spot. Automatic air conditioning gets its own full section (page 74) with blower motor and compressor clutch circuits. And the cruise control system (page 82) includes the actuator and control switch wiring for both left- and right-hand drive models.

Why This Manual Beats Aftermarket Copies

I’ve ordered aftermarket electrical manuals that claimed ‘complete coverage’ and arrived with generic diagrams for a completely different engine family. That’s not a risk with this OEM schematic. The joint connector pages (pages 2-3) list every single J/C terminal and which systems share that junction. If your brake warning lamp stays on and the reservoir is full, you can check whether the J/C that bundles the brake fluid level sensor with the ABS controller is making contact. An aftermarket reprint likely leaves out those J/C reference tables – they’re ‘too complicated’ to redraw. This manual has them.

Related Manuals

• Mitsubishi Space Star 1999 Workshop Manual – Section: Index
• Mitsubishi Shogun Circuit Diagrams Group 90
• Mitsubishi Pajero Sport Circuit Diagrams 2001

For general electrical fundamentals, you can reference the Automotive Battery article to understand load testing, but for the Space Star itself, stick to factory data. The Automotive Industry Overview might give you context, but it won’t tell you which pin on the multi-meter connector goes to the alternator.

FAQ

Does this manual cover the diesel fuel filter warning lamp?

Yes. Page 65 shows the fuel filter warning lamp circuit for diesel-powered vehicles. It includes the water-in-fuel sensor wiring and the lamp path through the multi-meter.

What about the intercooler fan circuit?

That’s on pages 92-93. Diesel Step II and Step III are separate. If you have a Step III, use page 93 – the fan relay control is wired differently because of the different ECM.

You can work on electrical problems without guessing when you have the factory layout in front of you. Stop wasting time with generic diagrams that lead you down the wrong wire. Access the Factory Manual now.