No Start? Battery cranks starter, fuel gauge goes to 1/2 when key is on?

Tiny
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Hi,

If that is a fuse you are referring to, that is an issue. As you mentioned, it should have 12v. Did you check power with the key both on and off?

Let me know.

Joe
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Friday, December 16th, 2022 AT 10:11 PM
Tiny
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Only with the key on. What does that particular fuse point ton if not reading proper voltage?
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Friday, December 16th, 2022 AT 10:45 PM
Tiny
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Point to if not reading proper voltage*
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Friday, December 16th, 2022 AT 10:45 PM
Tiny
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Code reader is linked up and shows no codes. Checking fuses/fusible links now.
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Saturday, December 17th, 2022 AT 9:08 AM
Tiny
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EFI #2(7.5a) in fuse block engine bay, reads millivolts w/o key on. Rest of fuses read 12v/12v. EFI #2 reads 10.8v/10.8 w/key "on" with the rest of the fuses in fuse block.
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Saturday, December 17th, 2022 AT 9:53 AM
Tiny
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All other fuses/fusible links/relays/relay sockets test good in engine bay.
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Saturday, December 17th, 2022 AT 9:54 AM
Tiny
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Inside vehicle fuse block all fuses are getting 10.5/10.5v with key "on" except panel, Mir htr, tail, and a/c. Those four are reading (mv/mv) with key on. All fuses have continuity.
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Saturday, December 17th, 2022 AT 10:35 AM
Tiny
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What do you make of EFI #2 not reading 12v/12v w/o key "on" and then 10.8/10.8 with key "on"?
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Saturday, December 17th, 2022 AT 8:46 PM
Tiny
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Also, if that is an issue, do you have any wiring diagrams of the engine bay fuse block you can give a link to? Thanks.
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Saturday, December 17th, 2022 AT 8:47 PM
Tiny
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Removed EFI relay and jumped. Now have 12v at EFI#2 fuse. All fuses inside vehicle fuse box are 10.6v with key on except tail, panel, htd mirror, a/c or a/t(unable to read it). Do any of those fuses only have voltage when engine is running?
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Sunday, December 18th, 2022 AT 11:56 AM
Tiny
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When jumping EFI relay, I hear a relay in the direction of the starter engage. What relay would that be and any thoughts on why still no spark. Installed new ckp.
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Sunday, December 18th, 2022 AT 11:58 AM
Tiny
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Hi,

If you jumped the EFI relay, that is why you have power at the EFI 2 fuse. Power from the relay is then sent through that fuse. When the relay is not actuated, the circuit to that fuse should be open. That could explain the millivolts you are getting. Also, when you jump it, it powers the circuit open relay which is designed to turn off fuel in the event of an accident. See pic 1

As far as the other components with millivolts inside the vehicle, they are the same things. If the relay to them isn't closed, you won't get voltage, so that too is normal. See pic 2

As far as the under-hood fuse box, I attached the powertrain wiring schematic for you. The schematic includes both interior fuses and under-hood.

Let me know if that helps.

Take care,

Joe

See pics below. Note: Starting with pic 3 is the beginning of the schematics. I had to cut each page in half to make it readable for you. I did overlap them so you can follow from one to the next.
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Sunday, December 18th, 2022 AT 8:52 PM
Tiny
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Tachometer still not moving when cranking with EFI relay jumped. New CKP sensor from Advanced Auto (Car Quest brand sensor). I've heard aftermarket CKP sensors sometimes don't work on Toyotas. Do you agree and what voltages am I looking for bat the CKP connector and what should the resistance of the CKP be? Thanks.
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Monday, December 19th, 2022 AT 1:11 AM
Tiny
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Not finding #35 (a/c fuse-10a) on wiring diagrams? Am I assuming that I need to jump tail relay (for tail and panel fuse to get 12v), DEF relay (mirror htd) to get 12v? Can you also give me the location of tail and DEF relays? Thanks.
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Monday, December 19th, 2022 AT 7:34 AM
Tiny
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New CKP is measuring (2k ohms) resistance. CKP connector is only getting millivolts with key "on" and EFI relay jumped. What am I looking at here?
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Monday, December 19th, 2022 AT 3:37 PM
Tiny
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Hi,

The CKP resistance is right where it should be.

There should be a 5v reference to the CKP. See pic 1 below. If you aren't getting it, there could be an issue with the wiring or the connector at the ECM. If you are only getting millivolts at the ECM, the ECM itself may have failed.

Also, the tone ring, which is mounted to the crankshaft timing pulley, may be damaged. See pic 2.

Let me know.

Joe
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Monday, December 19th, 2022 AT 4:52 PM
Tiny
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Where does CKP get power from?
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Tuesday, December 20th, 2022 AT 6:30 AM
Tiny
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Disregard the previous question. No power source to two (2) wire CKP. Can you give me the location of CKP wires on the ECU connector? Thanks.
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Tuesday, December 20th, 2022 AT 6:46 AM
Tiny
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Can bad battery cause ECU to need manual reprogram? Can this be done by jumping pins 3 & 14 on the data link hookup?
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Tuesday, December 20th, 2022 AT 6:51 AM
Tiny
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Security light continued to flash this morning after inserting key and when turned to "on". Hasn't done it again since then. Could I have an intermittent security issue causing no start since nothing else is planning out? If so, what can I do to correct? Thanks.
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Tuesday, December 20th, 2022 AT 8:04 AM

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