Setting Timing -- What I Learned Today

[Mr. Toad]

When jumpering E1 and TE1: If you miss and accidentally hit the bottom left terminal (+B), the engine stops immediately. Then you get to spend some time panicking that you killed the computer. After about 15-20 minutes, replace the under-hood, 15A fuel pump fuse and all will be well.

 

[RavenTai]

somone mentioned that you can read fuel pump voltage at the diag conector, I guess that would be the one?

 

[Mr. Toad]

somone mentioned that you can read fuel pump voltage at the diag conector, I guess that would be the one?

Yeah, provided you don't short it out, I think you could read the voltage there.

I'm attaching a diagram to clarify which terminal shorted the fuel pump fuse. The diagram is from a FourRunner, but the tic-tac-toe pin layout is the same as the FZJ. The "wrong" terminal is marked with an "X". So to re-cap, don't short the X to E1.

 

[e9999]

is this a standard Toy plug? when I had my smog test done last time in a small shop, the guy just shorted the pins without batting an eye and I doubt that he does more than 1 cruiser a year if that....

 

[Ted44]

So is this "short" accomplished with just any piece of wire or is theresomething particular about the SST mentioned in the FSM?

 

[Mr. Toad]

So is this "short" accomplished with just any piece of wire or is theresomething particular about the SST mentioned in the FSM?

Paper clip = SST

It's amazing 1) how rock-steady the timing mark is with the terminals shorted at idle, and 2) how much the timing floats at idle without the jumper in place

 

[Romer]

Did you get the dash light to come on when you shorted? mine did not.

 

[Mr. Toad]

Did you get the dash light to come on when you shorted? mine did not.

I didn't check. My results might not have been a good indicator anyway since I tried several things--including re-setting the computer by removing the battery negative--before finally checking the fuel pump fuse (at the FSM's suggestion).

 

[RavenTai]

Did you get the dash light to come on when you shorted? mine did not.

are you suppose to? I do not think I did, cannot remember now.

 

[Romer]

are you suppose to? I do not think I did, cannot remember now.

I went out last night and validated the procedure and that the light did not come on. The 80's cool link stated it should. With the paperclip out, the timing would fluctuate and with the paperclip in, it was rock hard. This showed I was taking it in and out of ECU control.

 

[RavenTai]

I went out last night and validated the procedure and that the light did not come on. The 80's cool link stated it should. With the paperclip out, the timing would fluctuate and with the paperclip in, it was rock hard. This showed I was taking it in and out of ECU control.

maybe you get a light on OBDI vehicles? I looked in the FSM it does not say that a light will light, it talks about hooking up the lexus hand held tester, I assume that would be where you would verify service mode?

when I set my timing it was steady. I never looked at the timing with the jumper unhooked,

 

[medtro]

I shorted the 2 terminals on my '93, and I did get flashing check engine light.

 

[cary]

Just to add, 1996 80, no CEL when I shorted the terminals, but it was evident it was in service mode as the timing went from fluctuating at 6-10 degrees to a steady 3.

Cary

 

[RavenTai]

I shorted the 2 terminals on my '93, and I did get flashing check engine light.

Just to add, 1996 80, no CEL when I shorted the terminals, but it was evident it was in service mode as the timing went from fluctuating at 6-10 degrees to a steady 3.

Cary

I guess that settles it, OBDI 93-94 get a light, OBDII 96-97 don't,

95 would probably folow 96-97 in this case?

 

[semlin]

the 93-94 cel flashes when you do that iirc