HJ61RG back door locking

[neixian]

Now my HJ61RG has central door locking! I LOVE this place!

Hi Guys,

Just brought a HJ61RG. Starting to work on things, the first of which is the central door locking.

The door circuit break is open, so there was no central door locking for many years for the previous owner. Press the mental plate down in the circuit break and the central door locking switch works!

However the tailgate doesn't work.

Checked two relays near the rear water bag, it works. Connect the relay to the battery and the switch is on, and I can see 12V power being relayed to the power lines.

Checked the solenoid by connecting it to the battery and it works.

But the tailgate still can't be locked/unlocked.

Now I have run out of ideas.

Can someone help?

Thanks.

 

[Crick60]

I think I've got the pin out for the lock solenoid in my manual. I'll check it out tomorrow.

I've had a few wires over the years die with in the loom to the back section. They usually breakdown core to core or core to body.

 

[sved]

Did you check the 15A Door fuse in the fusebox ? That one is for the backdoor only.

 

[neixian]

There are only two pins (one coil) on the solenoid instead of three as show in the electric diagrams. I was wondering how the two relays can change the direction of the current to make the solenoid move forward and backward, which can be easily done if the solenoid has three pins and therefore two coils, with each relay controlling one coil.

Tricky......

 

[neixian]

Theres is only one 15A fuse in the fusebox and it says DOOR.

If that is the one you are talking about, yes, it is good. And the relay switch has 12V power on it therefore I am sure fuse is not the issue, otherwise you won't be able to get the 12V power from the relay switch.

 

[sved]

the 2 relay's make the solenoid move because they reverse the polarity from + to - and back.
Therefore you only need 2 pins.
which diagram do you have?
I've got 3 different modelyears and they all show only 2pins.

 

[neixian]

the 2 relay's make the solenoid move because they reverse the polarity from + to - and back.
Therefore you only need 2 pins.
which diagram do you have?
I've got 3 different modelyears and they all show only 2pins.

This is the diagram I have got.


I still can't understand how two relays revers the polarity.

The relays are just two controlled switches. If the coil in the relay passes current the relay pass current to the solenoid to make it move.

Can you explain a little bit more please?

 

[sved]

What year is your HJ61 RG.?

 

[neixian]

What year is your HJ61 RG.?

1986.

The diagram is downloaded from the internet.
The Gregorys manual coming with the truck doesn't even say there is central door locking.

Can you please show yours?

 

[sved]

Here you go, Toyota EWD 1987 60 series


This will give you some better understanding of the tailgate solenoid's wiring.

 

[Crick60]

Here you go, Toyota EWD 1987 60 series This will give you some better understanding of the tailgate solenoid's wiring.

Man you're diagrams are heaps better than mine!!!

Where did you score them???

 

[neixian]

Thanks for sharing. Your diagram is more accurate however there must be something wrong at the top relay for the rear solenoid. The left hand side pin of the coil should connect to the unlock switch. Same as the right hand side front solenoid. Otherwise it won't work.

As i can't figure why relays are needed here, i am thinking about connecting the rear solenoid to the central switch directly.

What do you think?

Posted via IH8MUD app

 

[Crick60]

Mine are connected to the main switch as standard. But that's not to say it will work, again you'll have to check both circuits.

 

[neixian]

The relay definitely works as i can hear the click when lock/ unlock is performed. Therefore i am thnking connect the solenoid to the relay circuits instead.

Posted via IH8MUD app

 

[sved]

The top door lock relay nr5 LHS coil pin is NOT directly connected to the door lock switch.
The black dots in the diagram are connection Points.No black dot means that the lines are just crossing in the diagram.
It is connected to the door lock switch via the front RH door solenoid.
So activate LOCK on the door switch will result in that top relay nr5 is activated.
Activate Unlock on the door switch will result in that down relay relay nr5 is activated.Current will pass through rear left hand solenoid towards door lock relay coil.

The door lock switch has always one side connected to mass when activated.

The diagram is correct.

You need the relays because the tailgate door solenoid has its own powersource through the 15A fuse.

Hope this clears things up for you.
Let me know if you have further questions,i will be happy to answer them for you.

 

[neixian]

The top door lock relay nr5 LHS coil pin is NOT directly connected to the door lock switch.
The black dots in the diagram are connection Points.No black dot means that the lines are just crossing in the diagram.
It is connected to the door lock switch via the front RH door solenoid.
So activate LOCK on the door switch will result in that top relay nr5 is activated.
Activate Unlock on the door switch will result in that down relay relay nr5 is activated.Current will pass through rear left hand solenoid towards door lock relay coil.

The door lock switch has always one side connected to mass when activated.

The diagram is correct.

You need the relays because the tailgate door solenoid has its own powersource through the 15A fuse.

Hope this clears things up for you.
Let me know if you have further questions,i will be happy to answer them for you.

Thanks,

Yes, it makes sense.

I tried today to figure out what is wrong. I tested all relays and all good.
They respond to the main switch operations.

The only weird thing I have found is that the tailgate solenoid is not connected to either of the relays!

How can this be? Is there another serviceable part between the tailgate solenoid and the relays?

 

[sved]

What do you mean with ( not connected )?? Is there not a cable going to the solenoid?
Or is the cable damaged somewhere in the D-pillar or broken in the rubberconnection that sits between the body and the upper hatch.(I presume you have a hatch or do you have barn doors?).

 

[neixian]

There is a cable connecting the solenoid in the hatch door , however between the solenoid and the relay, it looks like a open circuit. It must be broken somewhere.

Posted via IH8MUD app

 

[sved]

most likely in that protective rubber booth ,that is also were the plastic washer hose goes through.Not so easy to reach but doable with enough patience.

 

[neixian]

Thanks, Did you mean on the top of the door?
It goes into the body and I have no idea where the serviceable place is.