air maf sensor

Jay you are on to something
both my car (originally an automatic ep91 glanza 1998 ---i converted to manual) and a friend's 1998 manual EP91 glanza have the same part numbers listed for the water temperature sensor...we have the 3 pin gray triangular sensor 89422-16010 or 89422-22030

I tried a random chassis search for 1996 ep91 glanza and the part number matches what you posted 89422-35010

so there's definitely a difference between the years somewhere.
 
  • Like
Reactions: Jay

Frankieflowers

Member +
If I am correct, THW on pin 4 of the second ECU connector on the ep91 automatic tranny should be receiving fron the water temp signal. But if you look at the color (might have lost color through the years) is brighter green and looks more like the air intake sensor wire. F704E88F-85C7-47A7-972C-DEB347E83B06.jpeg16C72B7E-1257-4F69-AC64-89911515F6EA.jpeg

I double checked and the air intake has same color but brighter. So the pin 4 is water temp signal. I will replace the sensor on Monday and try signal tomorrow.517F191D-9B96-482E-9CA4-829F6F5E37CC.jpeg
 

Frankieflowers

Member +
I honestly didn't realise until now that the EP91 used the earlier sensor setup. Thought they were all triangles.

It's good to know every day is a school day!
So I double checked to see what type of engine I am really keeping under the bonnet. It’s a EP 91.
AE3E18AE-9D0F-4247-AF1B-08D140733588.jpeg
 
yeah, that part number cross references with my car (as stated before it was originally an AT EP91 I converted to manual, but kept the AT ecu).
 

Frankieflowers

Member +
yeah, that part number cross references with my car (as stated before it was originally an AT EP91 I converted to manual, but kept the AT ecu).
I did the same. The only problem is that I have error 42 and I don’t know how to solve it. I did the bridge on the Big connector for the automatic gearbox. What do you suggest?
 
i'm not sure on the code 42..i don't fancy electronics....but as a suggestion check both the mechanical side and electrical side of vss connection...there may be some discrepancy between the signal for your corolla cluster vs the ep91 cluster
 
  • Like
Reactions: Jay

Jay

Admin
I'd agree, you need to make sure the ECU is seeing the correct vehicle speed signal from the cluster otherwise it'll throw a 42 fault code.

Even swapping from UK-spec EP91 to Glanza clocks will cause issues (see attachment).
 

Attachments

  • cluster pinouts glanza.pdf
    763.9 KB · Views: 2

Frankieflowers

Member +
I'd agree, you need to make sure the ECU is seeing the correct vehicle speed signal from the cluster otherwise it'll throw a 42 fault code.

Even swapping from UK-spec EP91 to Glanza clocks will cause issues (see attachment).
Thank you very much. So this is probably the reason why the guy who swapped automatic with manual transmission didn’t have any check engine light errors. Because it was between two starlet cars. In my case we are talking about two generations that passed each other at least seven years. I really have to try to make this work and understand why the car doesn’t start. I’ve changed the water temp signal sensor and checked if the wires or interrupt but they are not. So it’s a mystery. It’s probably might be a mechanic issue. My brother thinks it might be one of the injectors leaking that don’t keep the fuel in place. I try to unplug the fuel rail return before turning the car on in the morning and there was no fuel coming out. As the car fuel pump starts when cranking then what keeps the fuel and pressure? it might be a mechanical issue. We need to find someone who had a similar problem. I also need to figure out why the car smokes blue. I need to take the spark plugs out and see if there is oil and probably it will be caused by the valve sealing rubbers or hopefully not the piston lower it rings that keep the oil in place. I was hoping it was a turbo problem that would have cost me less money. Let me know what you think. Thank you
 

Frankieflowers

Member +
I'd agree, you need to make sure the ECU is seeing the correct vehicle speed signal from the cluster otherwise it'll throw a 42 fault code.

Even swapping from UK-spec EP91 to Glanza clocks will cause issues (see attachment).
Where can I find the aclrolla daahboard pinout to compare it with the ep91?
 

Frankieflowers

Member +
I'd agree, you need to make sure the ECU is seeing the correct vehicle speed signal from the cluster otherwise it'll throw a 42 fault code.

Even swapping from UK-spec EP91 to Glanza clocks will cause issues (see attachment).
How can I compare it with the Corolla dash pinout?393B5904-6923-4A6F-8F70-211FEA61B443.jpeg
 

Jay

Admin
Where can I find the aclrolla daahboard pinout to compare it with the ep91?
I had a quick look and I can't find it online. Maybe try a Corolla owners club? (I genuinely haven't a clue where I got this Glanza comparison from - just found it on this computers hard-drive).

What about the 22 error code? Apparently the sensor is connected directly to the ECU but it gives the error.
Now we're getting somewhere, so if the ECU is seeing the signal from the sensor perhaps the sensor isn't reading correctly. What state is the connector in? What usually happens is that the O-ring on the distributor hardens up and allows engine oil to contaminate the connection. This makes the wiring brittle and disrupts things.
 

Jay

Admin
it might be one of the injectors leaking that don’t keep the fuel in place. I try to unplug the fuel rail return before turning the car on in the morning and there was no fuel coming out. As the car fuel pump starts when cranking then what keeps the fuel and pressure? it might be a mechanical issue. We need to find someone who had a similar problem. I also need to figure out why the car smokes blue. I need to take the spark plugs out and see if there is oil and probably it will be caused by the valve sealing rubbers or hopefully not the piston lower it rings that keep the oil in place. I was hoping it was a turbo problem that would have cost me less money. Let me know what you think. Thank you
It's pretty easy to spot a leaking injector, all that excessive fuel will wash the piston clean and you will get a strong smell of fuel from the oil. Remove the sparkplugs and inspect with a borescope (less than a tenner on ebay).

Regards the blue smoke - blue means oil is being burnt. The source could be multiple factors depending on the age and condition of the engine. Under what conditions does it smoke?

In any case I'd advise a compression test and leakdown test whilst the plugs are out.
 

Frankieflowers

Member +
I had a quick look and I can't find it online. Maybe try a Corolla owners club? (I genuinely haven't a clue where I got this Glanza comparison from - just found it on this computers hard-drive).


Now we're getting somewhere, so if the ECU is seeing the signal from the sensor perhaps the sensor isn't reading correctly. What state is the connector in? What usually happens is that the O-ring on the distributor hardens up and allows engine oil to contaminate the connection. This makes the wiring brittle and disrupts things.
You know what? I actually noticed oil when I was managing the connector to change it with the new one. I found out that there was oil and I thought it was leaking from the head gasket. In fact it might be what you just said that the oil comes out from the distributor. I cleaned up the connector with a special product for connectors and tested it but it doesn’t seem to do his job for some reason. So what is it I should do? Get the distributor out?
 

Jay

Admin
Common to see on older 4EFTE tbh.

Ideally remove the distributor and renew the seal with a genuine Toyota seal (generic O-rings don't always seal great but would do in a pinch).

I blasted my last messed up connector with electrical cleaner spray but it didn't help at all. Ended up replacing the connector with a spare to sort it. The oil perishes the rubber components inside the connector and in extreme cases will actually follow the electrical current into the loom so it's best to tackle it early.

Dutchie did a great post on getting new connector bits, give me a second..
 
Top