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Honda Aquatrax ARX1200 T3 T3D N3 COOLING SYSTEM SUMMARY OF TROUBLESHOOTING FOR OVERHEATING

This watercraft controls the engine as follows, in the event it overheats.

• If the cooling water temperature is above 85°C (185°F), the engine control module (ECM) will limit the engine speed to 3,000 rpm to prevent engine damage. If the engine coolant temperature (ECT) sensor detects a water temperature above 95°C (203°F), the engine will shut off (failure code #47).

• If the manifold surface temperature switch detects the engine is overheating, the ECM will shut off the engine (failure code #46).

• If the manifold surface temperature switch detects the engine is overheating, the ECM will shut off the engine (failure code #46).

BEFORE BEGINNING TROUBLESHOOTING

Ask the user about the following condition:
1. Check whether the intake grate (water intake area) had been clogged.
(Temporary failure if it had been clogged)
2. Ask which of the following symptoms appeared when the engine overheated.
– The warning buzzer sounded and the engine stopped immediately .
– The warning buzzer sounded and the engine speed did not rise above approx. 3,000 rpm.
– The warning buzzer sounded and the engine
speed did not rise above approx. 3,000 rpm,then the engine stopped.

THE WARNING BUZZER SOUNDED AND THE ENGINE STOPPED IMMEDIATELY (EXHAUST COOLING SYSTEM)

1. Cooling water filter
Remove the jet nozzle  and check the water filter.
Is the water filter clogged?
YES – Clean the water filter.
NO – GO TO STEP 2.

2. Cooling water hose damage check
Remove the side panels .
Flush the system .
Is there any damage in the water hoses or is the water hose disconnected?
YES – Repair the damage.
NO – GO TO STEP 3.

3. Pilot water nozzle (flushing check)
Flush the system and check the pilot water hole

Is the water running from the water nozzle?
NO – The system is clogged between the oneway valve and exhaust manifold.

YES – GO TO STEP 4.
4. Pilot water nozzle (check with the watercraft in
the water)
Start the engine on the water.
Is the water running from the water nozzle?
NO – The system is clogged or the water hose
is disconnected between the jet pump
and one-way valve.
YES – GO TO STEP 5.
5. Test-run
Test run the watercraft in the water.
Does the engine stop as soon as the warning
buzzer sounds?
YES – GO TO STEP 6.
NO – GO TO STEP 7

6. One-way valve
Check the one-way valve

Is the one-way valve normal?
NO – Replace the one-way valve.
YES – GO TO STEP 7.
7. Cooling water passage (inlet section)
Check for clogs between the jet pump and oneway valve.
Is the system clogged between the jet pump
and one-way valve?
NO – Clean or replace the faulty part.
YES – Check the engine cooling system

THE WARNING BUZZER SOUNDED AND THE ENGINE SPEED DID NOT RISE ABOVE APPROX. 3,000 rpm (ENGINE COOLING SYSTEM)

1. Cooling water filter

. Cooling water filter
Remove the jet nozzle and check the
water filter.
Is the water filter clogged?
YES – Clean the water filter.
NO – GO TO STEP 2.

2. Cooling water hose damage check
Remove the side panels .
Flush the system.
Is there any damage in the water hoses or is the
water hose disconnected?
YES – Repair the damage.
NO – GO TO STEP 3.
3. Pilot water nozzle (flushing check)
Flush the system and check the pilot water hole
(page 4-15).
Is water running from the water nozzle?
NO – • ARX1200T3/T3D: GO TO STEP 4.
• ARX1200N3: GO TO STEP 5.
YES – GO TO STEP 6.
4. Check for clogs in the engine cooling system
(ARX1200T3/T3D)
Disconnect the water hose of the inlet side of the
intercooler.
Connect a garden hose to the water outlet joint
and turn on the water.
Is the water spraying forcibly out from the
water hose?
YES – The water passage in the engine is
clogged.
NO – GO TO STEP 6.

5. Check for clogs in the engine cooling system
(ARX1200N3)
Disconnect the water hose of the inlet side of the
exhaust manifold.
Connect a garden hose to the water outlet joint
and turn on the water.
Is the water spraying forcibly out from the
water hose?
YES – The water passage in the engine is
clogged.
NO – GO TO STEP 6.

6. One-way valve
Check the one-way valve (page 7-9).
Is the one-way valve normal?
NO – Replace the one-way valve.
YES – GO TO STEP 7.

7. Cooling water passage (inlet section)
Check for clogs between the jet pump and oneway valve.
Is the system clogged between the jet pump
and one-way valve?
NO – Clean or replace the faulty part.
YES – Check the exhaust cooling system

THE WARNING BUZZER SOUNDED AND THE ENGINE SPEED DID NOT RISE ABOVE APPROX. 3,000 rpm, THEN THE ENGINE STOPPED

1. Cooling water filter
Remove the jet nozzle  and check the
water filter.
Is the water filter clogged?
YES – Clean the water filter.
NO – GO TO STEP 2.

2. Engine cooling system check
Perform the engine cooling system check

Is the system normal?
YES – Correct the faulty part.
NO – GO TO STEP 3.
3. Exhaust cooling system check
Perform the exhaust cooling system check.
Is the system normal?
NO – Correct the faulty part

 

Related files:

468

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