Jeza

I do not know, it was just that you were in that area with a mass of wires, something could have been disturbed. Does the replacement head unit support a speed input?

Hi P0500/42 - When the secondary pulley rotation speed is 1000 rpm or more and the SPD signal is not input for 2 seconds or more while driving. The wheel speed pulse signals output from the ABS wheel speed sensors attached to each wheel are converted by the skid control computer ASSY into vehicle speed pulse signals (equivalent to 4 pulses per rotation of the transaxle rotating shaft), which are then output as a vehicle speed signal to the combination meter and input to the engine control computer. There is a speed signal fed into the head unit, from the combination meter, if this wire is connected incorrectly or grounded then the speed signal may be compromised. Originally a grey 5 pin connector connected to the head unit, this has probably been removed now. A Violet colour wire is the speed signal, within the same harness as the reversing pink wire and parking brake switch blue/white wire. Hope this helps

The item I ordered is not on amazon now, but search "uv clear headlight film" and quite a few come up, including various colours.

You can get clear UV self adhesive protection film to apply after cleaning, It is a bit of a pig to apply due to the double curvature of the cover, heat gun required to stretch it where required. Protects from stone chips and fine erosion as well and lasted four years, I think I got it from Amazon.

Hi, I have wiring diagrams for 10 series hybrid in .pdf and was wondering if there is an easy way to translate these? I have done a few by loading into Gimp, export as .png, use Google translate, import to Gimp and export back to .pdf. I have translated all the .html files and some images.

Theatre system 2005 04 onwards wiring diagrams plus connectors on the head unit (Radio receiver Navigation receiver). The back guide system, cameras, also feed in, (hdam5910 and 5920) hdam5440.pdf hdam5410.pdf hdam5420.pdf hdam5430.pdf g1.html g2.html g39.html g33.html g5.html g8.html g34.html g43.html hdam5920.pdf hdam5910.pdf

That's the same configuration as mine with the aux battery under the drivers seat and leisure one in the console. There is a slight drain on the aux battery due to immobiliser, alarm, radio, various ecu's bit should not drain the battery in a few days. Try disconnecting the leisure battery to check the split charge relay is working correctly and not allowing the leisure side to take power from the aux battery. My aux battery is only a 45Ah AGM as it is squeezed under the seat.

When you say you have anAlphard conversion, is that a camper? If so do you have a leisure battery with split charge relay? Is the 12v auxiliary battery still in the centre console or moved somewhere else, just making sure you are looking at the correct battery.

What age is it and does it have the theatre sound system? I have 10 series wiring diagrams

There is no conventional starter motor on a hybrid. Initial start uses the Hybrid motor within the gearbox, subsequent starts, while driving, uses the starter/generator mounted on the back of the engine driven/driving the serpentine belt.

Basically no. There is an HV battery charger costing ££££ connecting it involves disconnecting the HV battery cables at the inverter to attach to the charger. A lead also goes to the HV battery ecu. With the HV leads disconnected from the inverter there is no way to get a/c power to the air-conditioning pump. Portable aircon unit required!

Check the engine earth strap as well

Don't use Gen 1 cells. 10 series Alphards came with Gen2 cells, I have had the pack replaced with Gen 4 Prius cells.

Air con system wiring diagram, 10 series hybrid. The Air conditioner amplifier (2 way) is located to the left of the radio head unit. The Air Conditioner Amplifier is within the heat/vent/distribution control panel below the head unit. Air con system wiring ATH10.pdf

After individual cell replacement in 2023 a year later another cell went bad so I decided to bite the bullet and replace the whole pack. 2003 with 130,000km is not a bad life for the battery. I went with Gen 4 cells which are the latest and I certainly notice a difference, slightly better acceleration and longer battery only around town. hanks to Hybrid Battery Repair, Glasgow.

Yes I do, I will have a look and get it posted up but the A/C system is complicated as it is tied into several systems.

Wiring diagrams of the HV system with most of the Japanese translated manually, and using GIMP to add the text. I could not find any other way to do it with this type of pdf with embedded text within images and retain the quality. Hope it is of some use to you all. Alphard HV wiring 10 series pt1.pdf Alphard HV wiring 10 series pt2.pdf

On the Hybrid there is no starter relay as such, the engine is initially started using the Hybrid motor in the gearbox. Subsequent stop/starts uses the starter generator via the serpentine belt. Check the gear lever is in park and "P" is displayed on the dash.

The Hybrid battery system never fully charges the battery during general driving so there is spare capacity for regeneration braking. This also keeps the battery temp down as the inner cells of the pack are prone to overheat and fail as I have found out.

Yes there are, but it will not change the road tax, likewise very little info will get transferred from the Japanese Type Certificate to the logbook. The log book info all comes from the Europe Type approval regs and as the Japan one is not in the correct format DVLA can not transfer the info. Mine is just a Toyota, I did get the fuel changed to Gas Bi-Fuel and added exhaust emissions. pictures from V5 and CofC

I presume it is the ABS unit which has an electric pump and accumulator in it. I have had an unexpected leak from the accumulator, after it had been in the garage for an MOT, which lights up several warnings. I suspect they had pushed the brake pads back away from the disc, anyway a few hard pumps of the brake pedal cleared the fault. A bit of muck on a check valve?

You just need to remove the lower glove box, unship the ECU, the fuse box is up behind next to the bulkhead. Lie on your back in the passenger foot well look up and you should see it. You will need a pair of long nose pliers.

All early 10 series hybrids are 96kw at 5600rpm. (109kw including the hybrid motors)

I have only found one point under the bonnet, which also has a sight glass to check the level of refrigerant. I assume the temp control flap actuator is moving correctly and is not stuck on hot? Do the pipes on the compressor have a significant temp difference? I can not find anywhere in the manual how or where to connect the aircon test tool. Attached are some files which may be of some help. Refrigerant is HFC-134a (R134a) amount 830+/- 30g. Extraction of refrigerant.pdf Refrigerant check.pdf

Hi, I have made a short video while repairing my 2003 Alphard heater air blend door actuator by replacing the tracked disk within the unit. Hope it helps if you have a noisy or intermittent actuator. https://www.youtube.com/watch?v=Tr0H7cIDzPE