6G Celicas Forums

Hey guys,

I am not able to find an answer to the following question: what is the vacuum routing schematics on California emissions 96+ 2.2l 5SFE vehicles?

On a Federal car, there are 3 ports under the throttle body - 2 are for coolant in and out, 3rd one is the vacuum line that goes to the power steering pump via a metal hard line behind the intake manifold.

On a California emissions vehicles, that 3rd fittings under the IACV goes to the fuel injector assist port on the cylinder head instead. BUT, where does the PS pump idle up hook up go to??? I cannot find an answer anywhere. Dealer diagrams mention the different part numbers but the schematic drawings are inconclusive (and also include other bits from earlier Camry/Rav4 cars that are not present on Celica), and the factory BGB does not have any drawings on this. Does it go to the intake hose? Is there a vacuum T somewhere?

Any help, or pictures if you have some of your Cali spec 5SFE would be greatly appreciated.

There are some differences between the Federal and California spec motors. This is information from personal experience because I have worked on both types of engines. Here are the differences:
1. The injector seats on the head are different because the injectors are different (250cc injectors vs 235cc on the Fed). If you try to use federal injectors on a Cali head, there is a good chance it will leak. Speaking from personal experience, I had my engine catch on fire because of it.
2. There is an extra egr port sticking out of the back of the cylinder head. I believe it goes to the middle port on the throttle body.
3. The distributor is different because there is now a crank sensor on the oil pump. (which makes the wiring also different)
4. ECU is different and programed for sequential injection. Also it now reads the O2 sensor after the cat and throws a CEL if the cat is gone or no longer working.
5. The vacuum routing is different and I had to do some trial and error because the diagram on the firewall was not accurate. Here are all the diagrams I used to put the vacuum lines back together:
5sfe Vacuum Parts
[url=https://flic.kr/p/23MHWwt]5sfe Vacuum 2

This is the diagram on the firewall. It is not accurate.
[url=https://flic.kr/p/22oR26A]IMG_3390
I think the reason why the firewall diagram is not accurate is because all cars are built as Federal cars then converted to California spec by a company in the US after the fact.

This post has been edited by HardHead93: Mar 13, 2018 - 3:42 PM

Thanks for the response.

After digging some more, I think I have it figured out:
-Fed emissions: the "middle port" under the throttle body goes to the metal piping behind the intake manifold (via 17341-74340) and feeds the FPR and PS idle-up valves. Intake hose (17881-74690) has 1 hole for PCV.
-Cali emissions: the same middle port under the throttle body goes to the air-assist port b/w cyl 2 & 3 via 17341-74510, AND the AIR INTAKE HOSE is different (17881-74700) has 2 holes, first for PCV on the front same as fed, second hose on the back now goes to the FPR and PS idle-up via 1730874460 and a 90 bend (90412-08005). Below is the link to the parts that specify Cali and Fed intake hoses, and a parts diagram:
https://parts.toyotaofcoolsprings.com/auto-...air-intake-scat


I already have the Cali "Light Green" air assisted injectors (23250-74140, 264cc) and the corresponding cylinder head and even the cali ECU (89661-2G261), and reading about your experience with injector fitment issues is my primary reason for deciding to stick with Cali emissions.

Another interesting fact: unlike 94-95, 96 and up cars had the same distributor with external coil for Fed and Cali cars. Furthermore, the distributor is fixed and timing is handled completely by the ECU. There is a single 2-pin connector to the distro for the Camshaft Position Sensor.

Yo, having cel p0401, egr. No can seem to figure it out. I was wondering why the vacuum lines got to throttle body...then to no where? They're blocked by the gasket.

The TB to Manifold gasket is not your issue - that's how they all are.

I posted several detailed responses to your issue in your thread. You did not respond to or comment on either.

You either need to get yourself a $30 vacuum pump and perform some diagnostics on your issue, or you'll be throwing parts at it till you maybe get lucky.

I've been curious about all the differences. How does sequential injection make any difference?