How to Remove Engine ECU for HINO S5 Trucks

This instruction show you guide on how to remove engine ECU for HINO S5 trucks.

 

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Procedures:
1. CAUTIONS
! CAUTION
Perform replace after cooling to prevent burns. (Turn the starter key to the "LOCK" position and leave it for more than 30 minutes to cool.)

2. CLEANING AND DISCONNECTING THE ENGINE ECU CONNECTOR
(1) Check that the engine ECU connector is completely connected to the engine ECU.
(2) Directly spray water around the engine ECU connector by using a spray bottle.
! CAUTION
While working, do not disconnect the connectors.
 

NOTICE
If it is much dirty, squirt water at the connector sliding portion and connector surface.
(3) Blow air around the engine ECU connector and engine ECU surface to remove dirt and foreign matter.
! CAUTION
• While working, do not disconnect the connectors.
• Blow off water with air as much as possible for drying.

(4) Using the small brush, carefully remove dirt and foreign matter remaining at the sliding portion.
! CAUTION
While working, do not disconnect the connectors.
(5) Using the waste cloth, wipe off around the engine ECU connector and engine ECU surface.
! CAUTION
• While working, do not disconnect the connectors.
• Wipe up water thoroughly.
(6) If you feel the movement of the lever unsmooth, repeat steps (1) through (5).
(7) Disconnect the engine ECU connector and check it for deposition of dirt and foreign matter.
a. Set the hook of the connector in the direction of the arrow to release the lock.
b. While pushing the primary latch of the connector, move the lever in the direction of the arrow as shown in the figure until a "click" is heard and then detach the connector.
c. Pull out the connector straight.
 

! CAUTION
• Do not insert and remove the connector more than necessary.
• Do not give shocks to the engine ECU.
• Never detach the harness by holding and pulling or prying as it may result in wire or terminal deformation.
• Never insert a test lead from the rear of the connector.
• Do not paint or apply grease or oil to the ECU surface and connector to maintain their functions and durability.
NOTICE
If it cannot be pulled out with a light force, check if the lever is fully open.

(8) If the side of the harness side connector is found dirty, wipe it off
with a moistened waste cloth while being careful not allowing dirt and foreign matter to drop.

! CAUTION
• Use the thoroughly wrung waste cloth.
• Do not wipe off the terminal opening.
• Do not directly spray water.
(9) If the engine ECU side connector is found dirty, wipe off its side with a moistened waste cloth.

! CAUTION
• Use the thoroughly wrung waste cloth.
• Do not wipe off the terminal opening.
• Do not directly spray water.
(10) Blow the air on the terminal part inside the engine ECU side connector to remove dirt and foreign matter.