The Hino 700 (also known as the Profia) is a heavy-duty truck designed for long-haul transport, featuring a robust instrument cluster with analog gauges and a multi-information display. Warning lights are crucial for monitoring engine, transmission, and safety systems. Understanding these indicators helps prevent costly breakdowns and ensures compliance with regulations.
Hino 700 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Check Engine | AMBER | Illuminates when the engine ECU detects a fault in emissions, fuel, or sensor systems specific to the Hino 700's E13C or A09C engine. | Reduce load and have the truck scanned with a Hino diagnostic tool as soon as possible. | |
| Engine Oil Pressure | RED | Lights up if oil pressure drops below safe levels, often due to low oil or pump failure in the Hino 700's high-torque engine. | Stop immediately and check oil level; if low, top up before restarting. | |
| Battery Charge | RED | Indicates the alternator is not charging the batteries properly, which can strand a Hino 700 with its high electrical load. | Check alternator belt and battery connections; continue driving only to nearest service if possible. | |
| Coolant Temperature | RED | Warns of engine overheating, common in the Hino 700 during heavy hauling in hot climates if the cooling system is blocked. | Pull over, let engine idle with heater on full; check coolant level and fan operation. | |
| Transmission Temp | AMBER | Indicates transmission fluid is too hot, often from extended steep grades with a loaded Hino 700. | Shift to a lower gear and reduce speed; stop if light stays on to avoid damage. | |
| Brake System | RED | Illuminates for low brake fluid or air pressure in the Hino 700's dual-circuit air brake system. | Test brakes immediately; if pedal is soft or air pressure low, do not drive. | |
| ABS | AMBER | Indicates a fault in the anti-lock braking system, which can affect stability on the Hino 700's trailer combination. | Brakes still work but ABS is disabled; have system checked at next stop. | |
| DPF Regeneration | AMBER | Lights up when the diesel particulate filter needs active regeneration while driving the Hino 700. | Maintain highway speed for about 20 minutes to allow regeneration; do not idle. | |
| DEF / AdBlue | AMBER | Warns of low AdBlue level or quality, which can limit engine power on the Hino 700's SCR system. | Refill with approved DEF as soon as possible; do not let tank empty. | |
| Water in Fuel | AMBER | Indicates water has accumulated in the fuel filter separator, common with contaminated diesel in the Hino 700. | Drain water from the separator bowl at next stop to prevent injection pump damage. | |
| Low Fuel | AMBER | Shows remaining fuel is below 10% capacity; the Hino 700's large tank can still run for miles but plan refueling. | Fill up at the nearest diesel station to avoid running out of fuel. | |
| Parking Brake | RED | Indicates the parking brake is applied, or there is a fault in the spring brake system of the Hino 700. | Release the brake before moving; if light stays off, check air pressure. | |
| Air Brake Pressure | RED | Warns that air pressure in the brake reservoirs is below safe level for the Hino 700's air-over-hydraulic brakes. | Stop immediately and wait for pressure to build; do not drive below 80 psi. | |
| Engine/Exhaust Brake | GREEN | Illuminates when the exhaust brake or compression release brake is active on the Hino 700, aiding descents. | Engage when descending steep grades to slow the truck without using service brakes. | |
| Seat Belt | RED | Warns that the driver's seat belt is not fastened; the Hino 700 has a chime that activates above a low speed. | Fasten seat belt immediately to avoid distraction and comply with safety laws. |
15 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Check Engine Light (MIL)
Common causes
- Faulty oxygen sensor
- EGR valve sticking
- Diesel particulate filter clogged
What to do
For the Hino 700, use a diagnostic tool to read the fault code; common fixes include cleaning the DPF or replacing the sensor. Consult a Hino dealer if the light flashes.
Air Brake Low Pressure
Common causes
- Air line leak
- Compressor failure
- Brake chamber diaphragm rupture
What to do
Inspect air lines for leaks on the Hino 700's chassis; if pressure won't build, replace the air compressor or repair the leak at a service bay.
Engine Overheating
Common causes
- Low coolant level
- Radiator clogged
- Fan clutch malfunction
What to do
Check coolant reservoir on the Hino 700; if low, add coolant after engine cools. If recurring, flush radiator and test fan operation.
DPF Clogged / Regeneration Required
Common causes
- Frequent short trips
- Engine oil overfilled
- Faulty exhaust temperature sensor
What to do
Drive the Hino 700 at highway speeds for 30 minutes to force a passive regeneration. If light persists, a forced regen at dealer or cleaning may be needed.
Low AdBlue Level
Common causes
- Tank not refilled
- Leak in DEF system
- Faulty level sensor
What to do
Refill the AdBlue tank on the Hino 700 (located near the fuel tank) with recommended DEF. If warning stays, check for leaks or sensor issues.
Frequently Asked Questions
What does the amber 'DPF' light mean on my Hino 700?
It indicates the diesel particulate filter needs cleaning through regeneration. Drive at highway speeds for 20-30 minutes to clear it.
Why is my Hino 700's engine light on after refueling?
A loose or faulty fuel cap can trigger the check engine light on the Hino 700. Tighten the cap and drive a few cycles; if it stays on, have the system scanned.
Can I drive with the red battery light on?
No, the battery light means the alternator is not charging. You'll lose electrical power and eventually stall. Stop and check belts/connections, or call for service.
How do I drain water from the fuel filter on a Hino 700?
Look for the fuel/water separator with a plastic bowl; turn the drain valve (usually a knob at the bottom) until water stops, then close it. Do this regularly if you see the water in fuel light.
What does the retarder light mean?
It shows that the engine/exhaust brake is engaged. Use it on downgrades to save service brakes. The green light is normal when active.
Why does my Hino 700's transmission light come on?
It signals high transmission fluid temperature, often from overworking. Shift to a lower gear and reduce speed; if it persists, check fluid level and cooler.