Description

Mitsubishi FB13PNT, FB15PNT, FB18PNT, FB20PNT 2011 Wiring Diagram – Genuine Factory Schematics

I’ve seen too many guys with a multimeter and a beat-up aftermarket diagram that has the wire colors flipped. That burns time and melts harnesses. This is the real deal – the Mitsubishi FB13PNT, FB15PNT, FB18PNT, FB20PNT 2011 Wiring Diagram straight from Mitsubishi Heavy Industries. 24 pages, not a reprint garbage. If you’re working on one of these LUNA (MCFE) platform trucks and you need to trace a no-start, a dead lamp circuit, or a CAN bus dropout, this is the map you want on your bench, not something that came off a scan.

There’s 24 pages here. That’s it. No padding. The first page lists every circuit by sheet number – 48V Power Supply, Control Power Supply, Negative Circuit, Lamp circuits, Horn, Warning Buzzer & Back Buzzer, Motor Control, Logics Unit, Input Unit, Output Unit, CAN Circuit, Spare Power Supply, and a full run of connector pinouts. You can’t fix an intermittent electrical fault without knowing what each pin does. This gives you that. Need the charge relay supply? Look at sheet 01. Traction motor controller pins? Sheet 11 and 12. The whole thing is organized so you don’t flip back and forth like a moron.

48V Power Supply Circuit – Sheet 01

The main power bus runs off the 48V battery bank. This sheet shows the key switch path, contactor coil feed, and the main fuse links. On the FB18PNT I saw last month, the contactor wasn’t pulling in because a corroded 48V feed from the battery disconnect had dropped to 38V under load. The factory diagram let me trace back to the exact splice point without cutting all the loom. Aftermarket copies often merge the 48V and control power, which will get you a smoked controller. This manual keeps them separate – and correct.

Motor Control and Logic Units – Sheets 11-14

The motor controller on these trucks uses a 48V DC series wound setup with regen braking. Sheets 11-12 cover the power side – armature, field, and the pre-charge resistor circuit. Sheets 13-14 cover the logic unit and input/output unit. If your truck won’t drive but the key-on lights work, the problem is often the logic unit not seeing the throttle position sensor because a pulled pin in the 12-pin connector. The connector sheets (19-23) break down every terminal number and wire color. No guesswork. I used this to fix a FB15PNT that would only move in reverse – turned out the forward contactor coil wire was open at pin C3 of the output unit. Straight from the diagram.

CAN Circuit and Connector Pinouts – Sheets 17-23

CAN bus issues on these trucks will throw a bunch of unrelated codes. Sheet 17 gives you the complete CAN circuit with the terminating resistors and splice points. I’ve seen a guy replace three controller modules because he didn’t check the termination at the dashboard. The connector sheets (21-23) are the real gold – pin assignments for the 8-pin, 12-pin, and 24-pin connectors used across the truck. One of my techs traced a no-horn fault to pin B5 of the main cab connector – a chafed wire behind the dash. Without the factory connector layout, you’re probing random cavities. That’s how you blow fuses.

Why This Wiring Diagram Beats Aftermarket Copies

Aftermarket wiring diagrams for these Mitsubishi forklifts often combine the FB-PNT and FB-PN series into one generic mess. They leave out the 48V control power separation, flip the CAN high/low wires, and never show the internal component pin numbering. This is an original Mitsubishi Heavy Industries document, released July 1, 2011, with the development name LUNA (MCFE). The paper scans are clean, the line art is sharp, and the revision record at the bottom of each sheet shows the change history. You can trust the trace you make with this. Don’t use a third-party diagram on a 48V truck – a miswired connector can exceed the gate voltage on a MOSFET and pop a drive card.

Wiring Diagram Audience and Real-World Use Case

This is for the home-garage guy who owns a warehouse and has one FB18PNT that’s down, or the fleet mechanic who sees a dozen of these a month. The beginner gets a clear path through the circuits because the sheet numbers and cross-references are consistent. The pro gets a fast way to isolate a fault without pulling the whole harness. I used it to diagnose a no-charge condition on an FB13PNT in 20 minutes – the alternator field circuit was missing 48V key-on power because the key switch relay had a dirty contact. The diagram pointed me to sheet 02 (48V Key Power Supply) and then to the connector sheet to find the relay coil ground. Done.

Source Authenticity – Only OEM Documentation

This manual is the original Mitsubishi factory file, not a scan of a scan. The PDF retains the exact pagination, grid coordinates, and revision marks from the 2011 release. When I see “[CHG]” next to a circuit, I know that change was logged on July 1, 2011. Aftermarket versions omit that. If you care about safety and repair reliability, you buy the factory diagram. Mitsubishi FB13PNT-FB20PNT 2011 Wiring Diagram”>Check the full product page. For more service info, also see the Mitsubishi FB-PNT Series Service Manual”>complete service manual or the Mitsubishi FB-PNT/PN Series Forklift Service Manual”>PN series supplement. For general electrical diagnostics, reference Automotive Wiring”>Automotive Wiring and for fundamentals.

Does this wiring diagram cover the FB20PNT with the MCFE development name?

Yes. The diagram is labeled for FB13PNT through FB20PNT and has the development name LUNA (MCFE) on every sheet. It covers all four model variants.

What is the publication date and how many pages?

The release date is July 1, 2011, and the manual has 24 pages total, including the index, circuit diagrams, and connector layouts. It includes the revision mark history.

You want to fix this truck right the first time. Don’t chase ghosts with a faded photocopy. Get the original, trace it, close the ticket. Access the Factory Manual now from AutoRepairManuals and put the schematics where they belong – on your bench, not buried in a forum thread.