Description

Daihatsu GranMove Troubleshooting Manual – 80 Pages of Factory Diagnostics

I’ve lost count of the times a shop manual has saved me from pulling a trans that didn’t need pulling. You’re staring at a GranMove that won’t shift, the code reader shows nothing, and the aftermarket wiring diagram you obtained from some forum is wrong by three pin numbers. That’s where the Daihatsu GranMove Troubleshooting Manual comes in. 80 pages of the same diagnostic procedure the factory techs used. No guessing, no half-translated instructions – just the process.

Troubleshooting by Symptom: The Factory Process

The manual starts where the code reader stops. On page AT-88, the section “Störungssuche anhand von Fehlersymptomen” (troubleshooting by symptom) walks you through the exact sequence when the ECU shows no trouble code but the transmission isn’t working right. First, you do a manual test run to decide if the fault is mechanical or electronic. If the trans acts up during manual shifting, you focus on the hydraulics and clutches. If it shifts fine manually but fails in automatic, you move to the electrical check – and the manual gives you the specific pins and voltages to probe. That kind of step-by-step logic is what keeps you from throwing parts at it all afternoon.

Voltage Checks and Specs (OEM Data)

You need to check the speed sensor signal? The manual tells you exactly which pins on the diagnostic connector to read voltage across – pins 25 and 4 (SP and SPG) for the vehicle speed sensor. Spec: 0 V at 0 km/h, rising with speed, minimum 1 V at 20 km/h. That’s not a generic range; that’s Daihatsu’s factory spec. Same for the shift solenoid voltages: pins 42 and 4 (S1 and E11) and pins 21 and 30 (S2 and E12?) – the manual lays out the expected voltages for each gear. If you’re working on the GranMove’s automatic transmission, you need those numbers on the bench, not a year-old PDF from a third-party aggregator.

Manual Test Procedure: When the ECU Shows No Code

One of the smartest things in this manual is the manual test procedure. It tells you to disconnect the shift solenoids electrically and drive the trans manually through the gears using the shift lever. If the trans still slips or won’t engage, you know the problem is mechanical – valve body, clutches, or a stuck spool. If it shifts cleanly manually, the fault is in the electronic control system. That diagnostic split saves hours. Then the manual points you to the specific symptoms: “Gänge werden nicht geschaltet” (gears not shifting) – and gives you a checklist that covers the speed sensor, shift solenoid signal, and power supply circuit. Every step has a voltage spec. That’s how you fix a transmission without a code.

Why OEM Documentation Matters for the A/T

Aftermarket manuals love to give you generic torque values like “tighten to spec.” I’ve seen a trans fail because a DIY guy used 20 ft-lb on a solenoid bolt that called for 8 N·m. The Daihatsu GranMove Troubleshooting Manual is an original factory document. The page numbers, the diagnostic flow, the voltage tables – they all come from the OEM. I don’t trust aftermarket documentation on principle, because I’ve had to redo too many jobs after someone followed a reprint with the wrong pinout. This is the real thing. You get the same information the dealer techs used. Manual Transmission theory is one thing; actual factory voltage checks are another.

Is This Manual for You?

If you own a Daihatsu GranMove and you’re doing your own transmission diagnostics, this is the troubleshooting book you need. It assumes you have a multimeter, a scan tool (for basic code reading), and the factory special tool 09842-87501-000 (or a breakout box). It doesn’t hold your hand through engine removal, but it gives you the exact electrical tests to isolate a shift problem. That’s 80 pages of focused diagnostics, not a general repair manual. If you’re a home garage enthusiast who wants to fix the A/T without a trip to the dealer, this is your path.

Related Manuals

• Daihatsu CB-23, CB-61, CB-80 1987 Workshop Manual
• Daihatsu Charade Chassis Workshop Manual 1987
• Volvo BM Michigan 850 1995 Troubleshooting Manual

Manual Transmission knowledge helps, but this manual is about the automatic. Manual Transmission is a different animal – so stick with the factory document for your GranMove.

Frequently Asked Questions

Does this manual cover the engine or just the transmission?

It focuses on the automatic transmission troubleshooting. Engine diagnostics are not included.

What if I don’t have the special tool 09842-87501-000?

You can backprobe the ECU connector with a multimeter and a pinout diagram from the manual. The manual references the tool because it clips onto the ECU without backprobing, but you can work around it if you’re careful. Just verify each pin with the wiring diagram.

Is this the same as the factory service manual?

This is a troubleshooting supplement – 80 pages dedicated to diagnosing the A/T. The full service manual covers removal, overhaul, and rebuild. This manual is for getting the diagnosis right before you decide to pull the trans.

Which models and years does it cover?

It covers the Daihatsu GranMove with the AT-88 automatic transmission. Production years are approximately late 1980s to early 1990s. Check your transmission model plate to confirm.

You can stop chasing aftermarket wiring diagrams and voltage guesses. Access the Factory Manual and get the actual diagnostic steps for the GranMove automatic transmission.