Celica GT4RC Engine code's

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RWDragoon

New member
Does anyone have access to the GT4RC supplement guide? I keep getting code 54 Intercooler pump circuit. the pump seems to be functioning and I would like to know the proper diagnostic procedure for this issue.
 
C

Corey

Active member
I do,

Need to wait a couple hours, ill take some photos - my GF just got a new phone with a 3mp camera. so that should be decent enough.

Ill post them then.

But here's the jist:

2. Inspect Operation of Intercooler Water Pump

a) Turn the ignition switch ON and engine running
b) Open the throttle valve, and check that the water pump rotates
c) When the throttle pump is closed, check that the water pump stops after ~30 sec.

INSPECTION OF COMPONENTS:

2. Inspect Intercooler Water Pump

a) Connect the battery and ammeter to the water pump connector
b) Check that th water pump rotates smoothly, and check the reading on the ammeter.

Standard amperage: 1.5 - 2.1 A



I'll post images when i can.

In the manual, Code 54 reads as:

Diagnosis:
Intercooler Motor Stop.

Trouble Area:
-Intercooler level switch
-intercooler ecu
-intercooler motor
-intercooler circuit


So the code may mean any one of those things is to blame, not just the pump.


But since you said the pump seems to be working correctly, maybe a fuse or connector is to blame?
 
C

Corey

Active member
IMAGE_003.jpg



IMAGE_022.jpg


IMAGE_023.jpg


IMAGE_026.jpg


IMAGE_027.jpg
 
R

RWDragoon

New member
Thanks alot Corey! big help. Could I convince you to scan the whole supplement guide? That would be a sweet addition to the alltrac/gt4 community, as I cant find anyone else that has one.
 
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ST185pinjo

New member
btw, somebody can help to get rid off code 54, after fitting fmic in st185cs?
Click to expand...

Try pulling off the IC-ecu. It is located behind the radio.

I keep getting code 54 Intercooler pump circuit.
Click to expand...

On the fire wall there is a relay for the IC-circuit. Open it and clean it.
 
C

Corey

Active member
Do you have a GT4RC complete ECU pin out as well?
Click to expand...

Yes, I think so - it doesn't specify whether its for the ATA or WTA. But comparing the WTA ecu tests i posted above to the diagram i have, it looks to be the same.

I'll post a photo later when my gf comes home with the camera

corey
 
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sheikhas

New member
ST185pinjo":y3lc2wym said:
btw, somebody can help to get rid off code 54, after fitting fmic in st185cs?
Click to expand...

Try pulling off the IC-ecu. It is located behind the radio.
Click to expand...

I disconnect IC ecu, IC relay and bridge ic coolant sensor, no effect, code 54 still come. :(
Any toughts?
 
R

RWDragoon

New member
But do you have a legend for what the letters mean? And or wire color's



ST185pinjo":3hng60dp said:
Do you have a GT4RC complete ECU pin out as well?
Click to expand...

http://st165turbo4wd.hp.infoseek.co.jp/ecu_pinouts.html


I disconnect IC ecu, IC relay and bridge ic coolant sensor, no effect, code 54 still come.
Any toughts?
Click to expand...

Disconnect the IC ecu(all connectors). Open the relay and clean the connections with sandpaper, then close and refit.

Did you reset the ecu(wires off the battery)?
Click to expand...
 
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ST185pinjo

New member
Yes I do, but I need to find that electrical wiring book first. :oops:

It's the wiring for a CS, so you will have to do some checking.

I'll post it up as soon as I find it.
 
C

Corey

Active member
Here is the RC ECU Diagram

IMAGE_034.jpg


IMAGE_035.jpg


I've got the next 2 weeks off, so i'll try and get this thing scanned up :)
 
R

RWDragoon

New member
Brilliant! Thanks man!

I found out last night that RC's have totally differnt wiring then USDM for things related to my alarm and remote start. The tach wire is in a totally differnt location behind the cluster, and only id say 30% of the wire colors were the same.... brutal!
 
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