Question about 2004 Toyota Corolla

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2004 corolla looking for the right wire for tach signal at pcm they said black wire position 5connector e6 theres 2 black wire side by side i dont see any number on connector need some wiring diagram at pcm

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That is true, just installed the clifford matrix one mile range remote starter system... while looking at the pcm, it will be the harness farthest to the right. yes there are 2 black wires but the correct one is the left of the 2 on the very far right harness... verify with a volt meter... hook up positive lead to constant + 12 volt source and probe the ground to that black wire and start the engine... meter will read between 1-6 volts... good luck.

Posted on Jul 03, 2008

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2008 impala no tach signal to pcm


DTC P0651: 5-Volt Reference 2 Circuit
You have a bad sensor or a short on the five ref. circuit .
The 5-volt reference 2 buss provides 5 volts to the following sensors:
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The APP sensor 1

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The crankshaft position (CKP) sensor

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The throttle position (TP) sensor 1 and 2

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The brake booster vacuum sensor

A bad sensor or short on the five volt ref. circuit will bring down the PCM and you will have a no start . I would pull the connectors off each of these sensors listed above to see if five volt ref. comes back to five volts . Well first check five volt ref at easiest sensor to get to . watch this video , he explains better !

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Dec 05, 2016 | Cars & Trucks

1 Answer

Is there any chance way to check the camshaft position sensor on a 2001 Hyundai sonata?


The connector for cam sensor shows three wires, that should be ref voltage-pink wire, black with white tracer- ground, signal-black wire. The signal wire carries signal to pcm. To check signal, is you have a digital multimeter that has a tach--duty cycle or dwell setting, they should react to a pulse on the signal wire. The ref voltage is 12 volts, probably goes hot with key on. The black wire with white-ground use an led testlight to check ground, should be computer safe.

There are several circuit that use the same 12 volt reference.

Dec 14, 2014 | Cars & Trucks

2 Answers

Which crankshaft sensor drives the tach on 2003 Malibu


It is above and behind the Alternator on the top. It looks like a "D" battery standing-up with a female pigtail hook-up on the top of it.

Sep 19, 2014 | 2003 Chevrolet Malibu

2 Answers

What wire could I splice into on my 1996 Toyota Corolla so that my Tach can read the RPM's from?


If the tach was an option for your corolla, it is very likely that the wiring harness in your car would have the connector for the tach. They would use the same wiring harness to cut costs, and whatever is not used would be left open on a car without a tach. You will have to find a wiring diagram to check for the tach connector-it would be up under the dash leading to the cluster. In earlier days, tachs were connected to the coil's negative side of the primary circuit.

Feb 01, 2013 | Cars & Trucks

1 Answer

Es lexus 300 p 1705...What is this?


DTC P1705 - NC2 (Direct Clutch Speed Sensor) Revolution Sensor Circuit malfunction or Direct Clutch Speed Sensor Output is 300 RPM or less with Vehicle at 20 MPH or more & with Park/Neutral Position Switch Off

Most probably you have an electrical fault causing the problem and attached is a diagnostic procedure. It could be 2 separate problems and after rectifying the P1705 only would you know it is single or 2. Repair manual shows right on top of transmission, black sensor with single bolt, 2 wire plug. P/N 89413-08020 list price $113.80

NOTE: DTC P1705 is set when PCM receives 2 gear position signals at the same time.

1. Turn ignition on. If any A/T gear position indicator lights remain illuminated when gear selector is moved from that gear, go to next step. If all A/T gear position indicator lights turn off when gear selector is moved from that gear, system is okay at this time.

2. Disconnect A/T gear position switch connector. If all A/T gear position switch indicators go out, replace A/T gear position switch. If all A/T gear position switch indicators do not go out, go to next step.

3. Reconnect A/T gear position switch connector. Shift through all gear positions except Reverse. Using a DVOM, measure voltage between 16-pin PCM harness connector "D", terminal No. 6 (Green/Red wire on 2.3CL or White wire on Accord and Odyssey) and 25-pin PCM harness connector "B" terminals No. 20 or 22 (Brown/Black wires).

If battery voltage is present, go to next step. If battery voltage is not present, check for a short in Green/Red or White wire between 16-pin PCM harness connector "D" and A/T gear position indicator, or A/T gear position switch. Repair as necessary. If Green/Red or White wire is okay, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary.

4. Shift through all gear positions except Neutral and Park. Measure voltage between 16-pin PCM harness connector "D", terminal No. 13 (Blue/White wire on Accord or Light Green wire on 2.3CL and Odyssey) and 25-pin PCM harness connector "B" terminals No. 20 or 22 (Brown/Black wires). If battery voltage is present, go to next step. If battery voltage is not present, check for a short in Blue/White or Light Green wire between 16-pin PCM harness connector "D" and A/T gear position indicator, or A/T gear position switch. Repair as necessary. If Blue/White or Light Green wire is okay, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary.

5. Shift through all gear positions except "D4". Measure voltage between 16-pin PCM harness connector "D", terminal No. 9 (Light Green/Black wire on 2.3CL or Yellow wire on Accord and Odyssey) and 25-pin PCM harness connector "B" terminals No. 20 or 22 (Brown/Black wires). If battery voltage is present, go to next step. If battery voltage is not present, check for a short in Light Green/Black or Yellow wire between 16-pin PCM harness connector "D" and A/T gear position switch. Repair as necessary. If Light Green/Black or Yellow wire is okay, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary.

6. Shift through all gear positions except "D3". Measure voltage between 16-pin PCM harness connector "D", terminal No. 8 (Green/Blue wire on 2.3CL or Pink wire on Accord and Odyssey) and 25-pin PCM harness connector "B" terminals No. 20 or 22 (Brown/Black wires). If battery voltage is present, go to next step. If battery voltage is not present, check for a short in Green/Blue or Pink wire between 16-pin PCM harness connector "D" and A/T gear position indicator, or A/T gear position switch. Repair as necessary. If Green/Blue or Pink wire is okay, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary.

7. Shift through all gear positions except "2". Measure voltage between 16-pin PCM harness connector "D", terminal No. 14 (Green/Yellow wire on 2.3CL or Blue wire on Accord and Odyssey) and 25-pin PCM harness connector "B" terminals No. 20 or 22 (Brown/Black wires). If battery voltage is present, go to next step. If battery voltage is not present, check for a short in Green/Yellow or Blue wire between 16-pin PCM harness connector "D" and A/T gear position indicator, or A/T gear position switch. Repair as necessary. If Green/Yellow or Blue wire is okay, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary.

8. Shift through all gear positions except "1". Measure voltage between 16-pin PCM harness connector "D", terminal No. 15 (Light Green/White wire on 2.3CL or Brown wire on Accord and Odyssey) and 25-pin PCM harness connector "B" terminals No. 20 or 22 (Brown/Black wires). If battery voltage is present, check for loose PCM harness connectors. Replace PCM with a known- good unit if necessary. If battery voltage is not present, check for a short in Light Green/White or Brown wire between 16-pin PCM harness connector "D" and A/T gear position indicator, or A/T gear position switch. Repair as necessary. If Light Green/White or Brown wire is okay, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary.


Hope helps.

May 24, 2011 | Lexus ES 300 Cars & Trucks

1 Answer

I have 1993 dodge dakota 3.9l v-6 with trouble codes 12,15 and 55 what do they mean


the trouble codes are as follows code 12 problem with battery connection. direct battery input tp pcm disconnected within the last 50 ignition key-on cycles. code 15 a problem with the vehicle distance/speed signal. no distance/speed sensor signal detected during road load conditions. code 55 completion of fault code display on check engine light. this is an end of message code. the speed sensor is located on the transmission/transfer case extension housing. check plug connection to speed sensor for power using an volt meter. connect the positive side of volt meter to the orange wire terminal and the negative side of volt meter to the black/light blue terminal. the voltage should be approximately 8.0 volts and to check the voltage from the pcm connect the positive end of volt meter to the white/orange wire terminal and the negative side ti the black/light blue wire terminal. signal voltage should be 5.0 volts. if there is no signal voltage signal, have the pcm checked out. if you have both signals from the terminals then remove the vehicle speed sensor and check the speedometer pinion for worn or missing teeth.

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2 Answers

I need to know where to wire the green wire to read RPM's for an aftermarket tachometer install on a 1999 chevy s10 with a 2.2l 4cyl.


It is usually to the positive side of the coil - also depends on what type of distributor cap you have, if there is a 3-4 wire plug that goes to the cap, one of them should be marked TACH

Oct 26, 2009 | Chevrolet S 10 Cars & Trucks

1 Answer

Defective tachometer and speedometer


Do the following:1)key in the ON position:remove the 7.5 gauge fuse.Tach needle should read "0:". 2)put it back,go on the engine and unplug the green plug on the igniter -the big one,with 5 or 6 wires on it.The needle on tach reading should be zero.If not you have a short circuit on the black wire between that plug and the plug on the conbination meter.3) If the reading is zero with the plug disconnected,the black wire for the tach is short-circuited inside the igniter. I have one available.email daddykouki@gmail.com

May 30, 2009 | 1989 Toyota Corolla 2 Door

1 Answer

Wiring diagram or information needed


That wire is for a tachometer.If not using a tach do not connect it.

Apr 02, 2009 | 1985 Toyota Corolla 2 Door

1 Answer

2004 toyota corolla tach wire


you can also solder the wire to the tach wire, this way it won't come off and cause a malfunction

Jul 03, 2008 | 2004 Toyota Corolla

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