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- Apr 2, 2007
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This regards my 1988 FJ62 with original 3F-E engine.
I've been running through the electricals trying to determine why the engine cranks beautifully (and I smell gas so I believe it's not a fuel pump issue) but I get no firing. No sparky at plugs; no voltage at igniter wires as they enter the coil; I pulled the igniter and got 0Ω resistance where I should be getting (___?___). My 1988 Toyota Repair Manual gives only Ω #s for coil, not its igniter, but it shouldn't be 0......right?).
Bought a replacement igniter with a NIB coil from cruiserparts.com for the price of a frontal lobotomy....no change. Hmm. Checked resistance of igniter leads upstream of igniter, get the following:
With battery disconnected, the upstream contacts provide:
B to B-G: 30.5Ω when battery connected: 52.0Ω
B to B-L: 34.5Ω =================> 1.3-1.5Ω
B-L to B-G: 6.0Ω ==================> 0Ω
Finally remembering I have read on Mud but cannot find good reference, I looked at the CEL. It does not illuminate either with the key at ON or, not surprisingly, START. So, from the 1988 Repair Manual, p. FI-74, I took a look at the ICU's surprisingly exposed relay - on right wheel well just behind the battery.
When extracted from the vehicle and bench tested, it is nominal when uncharged (see below); applying 12V it "clicks", closing the relay
and indeed get continuity between #a 2 & 4. Great: so the original relay is still good.
The 15A fuse for the EFI, located in the lower dashboard to the left of the steering wheel is good.
===> BUT....where the blazes does one locate that "MAIN 0.85R fusible link" as shown in the upper picture?????? <=== That appears all that remains to test, other than to learn if the entire EFI/ECU is still good
Thanks in advance for any help -
I've been running through the electricals trying to determine why the engine cranks beautifully (and I smell gas so I believe it's not a fuel pump issue) but I get no firing. No sparky at plugs; no voltage at igniter wires as they enter the coil; I pulled the igniter and got 0Ω resistance where I should be getting (___?___). My 1988 Toyota Repair Manual gives only Ω #s for coil, not its igniter, but it shouldn't be 0......right?).
Bought a replacement igniter with a NIB coil from cruiserparts.com for the price of a frontal lobotomy....no change. Hmm. Checked resistance of igniter leads upstream of igniter, get the following:
With battery disconnected, the upstream contacts provide:
B to B-G: 30.5Ω when battery connected: 52.0Ω
B to B-L: 34.5Ω =================> 1.3-1.5Ω
B-L to B-G: 6.0Ω ==================> 0Ω
Finally remembering I have read on Mud but cannot find good reference, I looked at the CEL. It does not illuminate either with the key at ON or, not surprisingly, START. So, from the 1988 Repair Manual, p. FI-74, I took a look at the ICU's surprisingly exposed relay - on right wheel well just behind the battery.
When extracted from the vehicle and bench tested, it is nominal when uncharged (see below); applying 12V it "clicks", closing the relay
and indeed get continuity between #a 2 & 4. Great: so the original relay is still good.
The 15A fuse for the EFI, located in the lower dashboard to the left of the steering wheel is good.
===> BUT....where the blazes does one locate that "MAIN 0.85R fusible link" as shown in the upper picture?????? <=== That appears all that remains to test, other than to learn if the entire EFI/ECU is still good
Thanks in advance for any help -