Daihatsu Hijet AC Parts - S100, S110 Models - 1994-1998
Heater and A/C blower motor for S100P/S110P trucks, plus A/C drive belts chosen by engine code and build date - with the factory's R134a rules, belt setting and blower checks.
Air-conditioning and heater parts for the Daihatsu Hijet S100/S110 family: the heater and A/C blower motor listed for S100P and S110P trucks, and A/C drive belts chosen by engine code and build date - with the factory's R134a rules, belt setting and blower checks from the service manual.
Blower: S100P/S110P trucks. Belts: match engine code and build date before ordering.
The belt follows the engine code and build date; the blower listing names the S100P and S110P trucks - add your chassis number at checkout and we confirm it before shipping.
Identify the truck first; each section below shows you how.
Find Your Truck
Two things decide what fits on this page: the exact chassis model and engine code from the identification plate, and the build date from your registration or title. The heater blower motor is listed for S100P and S110P trucks. The A/C drive belt follows the engine - EF-NS and EF-ES trucks, the EF-GS from 12/1995, the EF-TS turbo in the S120 and S130 vans, the EF-ZS van engine from 07/1994 - and the later S140 takes its own belt. One more check before you order: did the truck leave the factory with air conditioning? The blower motor listing covers S100P and S110P trucks - add your chassis number at checkout and we confirm it; the compressor belt, the cooling unit behind the dash and the condenser exist only on air-conditioned trucks.
| Check | Where you read it | What it decides here |
|---|---|---|
| Exact chassis model | CHASSIS NO. on the identification plate - S100P/S110P truck; S100V/S110V/S120V/S130V van; S140 | The blower motor listing (S100P/S110P) and which belt listing names your model |
| Engine code | ENGINE line on the plate - EF-NS, EF-ES, EF-GS, EF-TS or EF-ZS | Which A/C drive belt fits |
| Build date | Registration or title paperwork - or ask us with your CHASSIS NO. | Belt listings are split by date: EF-GS from 12/1995, EF-TS to 12/1996, EF-ZS van from 07/1994, S140 from 09/1997 |
| Factory air conditioning or heater only | A compressor belt on the engine and a condenser (the factory pulls the spare tire to reach it) are practical signs that A/C hardware is fitted - they do not by themselves prove original factory fitment on a modified or converted truck | Whether the A/C-only parts and procedures on this page apply to your truck; if unsure, incomplete or modified, add your chassis number at checkout and we confirm |
| Refrigerant generation | This generation's factory manual is written for the R134a system - that is the source's scope, not proof of what a particular truck runs today; a converted, mixed or unknown system needs confirming before oil or O-rings are chosen | Which compressor oil and O-rings the circuit may take - R12 parts and oil are not interchangeable (see A/C System); if the system's history is unknown, add your chassis number at checkout and ask |
Not sure what you are reading? Send the full CHASSIS NO. with your order and we confirm fitment before anything ships.
Choose Your Parts
Three product families are filed in this collection. Match the family to the job, then match the listing to the truck you confirmed above.
| Family | What it covers | Match it by |
|---|---|---|
| Blower motor | The heater and A/C blower motor for S100P and S110P trucks - the fan behind the dash; on A/C trucks the factory bolts the cooling unit to this blower assembly | Chassis model; the listing states the fit |
| A/C drive belts | Catalogued by engine code and date range: EF-NS/EF-ES trucks (S100/S110) 1994-1998 · EF-GS 12/1995-12/1998 · EF-TS (S120/S130) 01/1994-12/1996 · EF-ZS van (S100-S130) 07/1994-12/1998 · S140 09/1997-12/1998 | Engine code first, then chassis model and the listing's date range |
| Alternator | Also filed here: the alternator for S100/S110 trucks, 1994-1998 - engine electrical, not an air-conditioning part | Chassis model; see the listing |
Availability shows on each listing. Fitted-belt setting (factory): deflection 8 to 12 mm at 10 kg push force between the specified pulleys - see Inspection & Service. For EF-GS, EF-ZS and S140 belts the listing itself is the fitment reference - those codes sit outside this manual's coverage.
What you will not find here: compressors, condensers, evaporators, A/C switches, seals or seal kits - none is catalogued for this family at the time of writing. The factory chapter this page is built on covers the R134a rules, the compressor belt, the cooling unit and the condenser, and that is the ground this page stays on.
Oiwa guidance: if the blower has gone quiet, measure the blower resistor before you buy the motor - the Troubleshooting section carries the factory resistance values, and a meter rules the resistor in or out in minutes.
Inspection & Service
The factory chapter for this system prints no kilometre or month interval - there is no recurring service schedule to copy here. What it gives instead are two factory procedures: a belt readjustment rule for the first minutes of running, and a function check for the idle-up device.
| Item | Factory check | Standard |
|---|---|---|
| Compressor belt tension | Re-check the deflection after 5 minutes or more of running - a new belt stretches in - measured between the specified pulleys on the belt run the factory marks (figure below) | 8 to 12 mm at 10 kg push force |
| Belt condition | Too tight loads the bearings; too loose slips, squeals and shortens belt life - always check and adjust | As above |
| Idle-up device | Switch the A/C on and off three or four times and confirm the idle-up operates every time | Operates on each cycle |
Source: Daihatsu factory service manual for the S100/S110 family, heater and air-conditioning chapter. No kilometre interval is printed for these parts; the belt rule is a readjustment condition, not a service cadence.
Practical service guidance: put the belt re-check on the same visit as any belt replacement - fit it, run five minutes, measure on the marked run, readjust. That is our advice; the numbers are the factory's.
Heater Unit & Blower Assembly
The heater unit is six assemblies behind the dash: ① the instrument panel, ② the heater control, ③ the floor assembly, ④ the air duct, ⑤ the water hoses and ⑥ the heater radiator. On air-conditioned trucks the cooling unit is bolted to the blower assembly - the factory draws the two together in the second figure: ① blower assembly, ② cooling unit assembly.
Reaching the blower or the cooling unit means coming in through the dash: the factory's access route starts by removing the glove box, the meter and the instrument panel; the full removal choreography - refrigerant recovery, pipes, sequence - is under Installation & Service.
R134a Circuit & Condenser
This generation's factory manual is written for the R134a system, and it draws a hard line: the parts that make up the refrigerant cycle and the compressor oil are not interchangeable with the older R12 system. Refrigerant is R134a only - the wrong gas starves the compressor of lubrication and can lock it. Compressor oil is ND-OIL 8 only: R12 oil in this system risks a locked compressor and swollen rubber parts that leak refrigerant, and R134a oil in an R12 system shortens that system's life. O-rings must be the R134a type - the material and cross-section differ from R12 rings, and a wrong ring leaks gas.
The condenser carries its own fan and sits on a bracket assembly; it leaves the body as a unit with that bracket once the spare tire is off, the refrigerant recovered and the high-pressure pipes removed. Which pipe is which, and how the circuit is evacuated and charged, is in Installation & Service.
Troubleshooting
A symptom is an entry point, not a diagnosis. The checks below are the factory's own from this manual - pairing them with what you notice is our practical routing, so start where it fits and let the check decide.
| What you notice | Factory check or rule |
|---|---|
| Blower fan dead, or speeds missing - resistor check | Blower resistor resistance check. Factory expected readings: L–M = 2.0 Ω · M–H = 1.0 Ω. These are resistance readings measured between the labelled resistor terminals (connector: M at the top, L lower-left, H lower-right). A reading that is open, or far from these values, points at the resistor. |
| Blower fan dead, or speeds missing - switch check | Blower switch continuity check. Factory terminal combinations: OFF = E only · Speed 1 = E–L · Speed 2 = E–L–M · Speed 3 = E–L–H. The letters are the terminal labels shown in the factory diagram (connector laid out L, ⊕, ⊖ across the top row and H, M, E across the bottom); ⊕ and ⊖ are the separate illumination-circuit terminals, so the OFF and speed combinations apply to E, L, M and H only. Continuity that does not match this table points at the switch. |
| Belt squeal or noise | A loose belt slips, squeals and shortens belt life; over-tightening harms the bearings - check the deflection, 8 to 12 mm at 10 kg between the specified pulleys, and re-adjust to that range, no tighter |
| Idle sags or stalls when the A/C comes on | Cycle the A/C switch on and off three or four times and confirm the idle-up device operates each time |
| Compressor seized or locked | The factory names two causes: the wrong refrigerant, or R12 compressor oil in the R134a system - both starve the compressor of lubrication |
Oiwa guidance - reading the results: when the resistor readings between its labelled terminals and the switch continuity both match the factory table, those two parts are cleared and the blower motor itself is the next thing to check. Two passing checks do not by themselves prove the motor has failed.
Installation & Service
Compressor belt
Fit the belt, run the engine for five minutes or more so the initial stretch is taken up, then check the deflection and readjust it to 8 to 12 mm at 10 kg push force, measured between the specified pulleys on the belt run the factory marks (figure under Inspection & Service). Over-tight loads the bearings; too loose slips, squeals and shortens belt life.
Blower motor and cooling unit
The factory route: remove the glove box, the meter and the instrument panel; recover the refrigerant gas; disconnect the low- and high-pressure pipes; then take out ① the heater blower motor and ② the cooling unit. Installation is the reverse. Afterwards, refit the instrument panel, meter and glove box, charge the refrigerant and check for gas leaks.
Condenser
Remove the spare tire, recover the refrigerant and remove the high-pressure pipes; lift the condenser out of the body together with its bracket, then separate ① the bracket from ② the condenser assembly. Installation is the reverse - charge, leak-check, and refit the spare tire.
Workshop reference values
Service-procedure values from the factory chapter - for the workshop, not general specifications. They belong with the evacuation and charge steps above.
| Workshop step | Factory value | What it means |
|---|---|---|
| Evacuation | 10 minutes at 750 mmHg or more, then hold 5 minutes | Pull a vacuum on the circuit for at least ten minutes at that depth of vacuum, stop, and hold for five minutes: the airtightness check - a vacuum that decays means a leaking connection, so check and correct the connections and evacuate again. |
| Initial gas charge | Refrigerant as gas to 1 kg/cm² gauge pressure | Admit refrigerant as gas until the gauge pressure reaches about 1 kg/cm², run the gas-leak check, then complete the refrigerant charge - the manual prints no charge weight, so we do not supply one. |
| R12 vacuum pump | Solenoid-valve adapter required | An older R12 vacuum pump may be used to evacuate this R134a system only with the solenoid-valve adapter fitted first. |
Specifications
| Item | Factory specification | What it means |
|---|---|---|
| Refrigerant | R134a only | Use R134a refrigerant in this system - the factory manual is written for the R134a circuit and its parts are not interchangeable with the older R12 system; the wrong gas starves the compressor of lubrication and can lock it. |
| Compressor oil type | ND-OIL 8 | Factory-specified compressor oil type for this R134a system. The 8 is part of the oil specification, not an oil quantity - the chapter prints no fill quantity, so we do not supply one. R12 oil in this system risks a locked compressor and swollen rubber parts that leak refrigerant. |
| O-rings | R134a type | Use the R134a-specific O-rings: the factory distinguishes them from R12 rings by material and cross-section diameter, and a wrong ring leaks refrigerant. |
| A/C drive belt deflection | 8 to 12 mm at 10 kg push force | Factory belt-tension target: pressed with 10 kg on the belt run the factory marks (figure under Inspection & Service) the belt should give 8 to 12 mm; too tight loads the bearings, too loose slips and squeals - re-check timing is under Inspection & Service. |
Factory values from the S100/S110 service manual, heater and air-conditioning chapter. That chapter prints no refrigerant charge weight, no compressor-oil quantity, no operating pressures and no torque values - we do not supply those numbers from elsewhere.
Factory Notes
One boundary in the source worth knowing: the factory chapter for the heater and air conditioning stops at the compressor belt, the cooling unit and the condenser. It prints no refrigerant charge quantity, no compressor-oil quantity, no operating or service pressures beyond the vacuum and initial-charge figures above, no compressor removal or installation procedure and no torque values - so this page does not either.
Where can I buy Daihatsu Hijet AC and heater parts in the United States?
Oiwa Garage supplies Daihatsu Hijet air-conditioning and heater parts from our California warehouse. Availability varies by part, so check the individual product listing. Not sure you selected the right parts? Add your complete CHASSIS NO. at checkout and we will verify fitment before shipping.
Our 100% Fitment Guarantee
Add your VIN or chassis number at checkout and we verify the fitment of every part in your order before anything ships. We check your full chassis code, the ENGINE line on the identification plate (EF-NS, EF-ES, EF-GS, EF-TS or EF-ZS) and the build date, and whether your truck left the factory with air conditioning - the blower motor listing covers S100P and S110P trucks and the A/C belt listings follow the engine code and build date; the cooling unit and condenser are not catalogued here, and their procedures on this page apply only to A/C trucks. If anything does not match your truck, we contact you before dispatch. If something arrives wrong, we exchange it or refund you in full. No hassle, no runaround.
Contact Our Fitment Specialistsor text us directly at 562-661-8862
Fitment verified by the Kei Truck specialists at Oiwa Garage · Collection description updated August 2026.
