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Tach wire for 2004 corolla.... ecm - far right wire harness, 2 black wires on that particular harness... it is the black one more towards the left end... verify with a multi volt meter with the positive lead on the constant + 12 volts and probe the ground of the meter on the black wire mentioned above, start the engine and it will read between 1 and 6 volts... I installed the new clifford remote start alarm system 2-way, worked like a charm. You can also get the tach signal under the plastic cover in the engine but i strongly do not recommend that due to heat... my old remote starters tach wire was attached to there and the connection became loose and malfunctoned...
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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.
Radio Constant 12V+ Wire: Blue/Yellow Radio Switched 12V+ Wire: Gray Radio Ground Wire: Brown Radio Illumination Wire: Green Radio Dimmer Wire: N/A Radio Antenna Trigger Wire: Black/Red Radio Amp Trigger Wire: None Front Speakers Size: 5 1/4′ Front Speakers Location: Doors Left Front Speaker Wire (+): Pink Left Front Speaker Wire (-): Purple Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Blue Rear Speakers Size: 6 1/2′ Rear Speakers Location: Rear Deck Left Rear Speaker Wire (+): Black Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Red Right Rear Speaker Wire (-): White
Reasons are: HO2S no. 1 heater circut is open or shorted
HO2S no. 1 is defective
Defective ECM
Using a scan tool, read freeze frame data. Freeze fram data records engine conditions when a malfunction is detected.
Access ECM behind glove box. Turn ignition on. Using DVOM, backprobe
ECM harness connector. If DTC P0135 is set, measure voltage between
ground and terminal No. 3 (Blue/Black wire) at ECM harness connector
E10. If DTC P0155 is set, measure voltage between ground and terminal
No. 4 (Yellow/Red wire) at ECM harness E10. Voltage should be 9-14
volts at each terminal. If voltage is as specified, replace ECM.
If not, Disconnect suspect HO2S No. 1 harness connector. Measure
resistance between terminals B+ (Black/Yellow wire) and HT (Blue/Black
wire on bank No. 1 ; Yellow/Red wire on bank No. 2) at HO2S connector
(component side). Resistance should be 11-16 ohms at 68 degrees F and
23-32 ohms at 1472 degrees F. If resistance are not specified, replace
appropriate HO2S. If resistance are specified, Repair wiring between
ECM and appropriate HO2S, or between appropriate HO2S and EFI main relay
(Black/Yellow wire at HO2S and Red wire at EFI main relay)
Radio Constant 12V+ Wire: Blue/White Radio Switched 12V+ Wire: Gray Radio Ground Wire: Brown Radio Illumination Wire: Green Power Antenna Wire: Black Front Speaker Size: n/a Front Speaker Location: n/a Left Front Speaker Wire (+): Pink Left Front Speaker Wire (-): Purple Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Blue Rear Speaker Size: n/a Rear Speaker Location: n/a Left Rear Speaker Wire (+): Black Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Red Right Rear Speaker Wire (-): White
Good day
P0450 is Evaporate emission system pressure sensor/switch
the cause could be
1. short or open in the vapor pressure sensor circuit
2.vapour pressure sensor
3. ECM
You can test with the following
you can access the ECM behind the glove box. turn ignition on,backprobe the ECM connector, on A/T models, measure voltage between terminals #1 (green/black wire) and #22 (brown/black wire) at the ECM E6 connector. on M/T models measure the voltage between terminals #1 (green/black wire) and #9 (brown/black wire) at ECM E6. if voltage is 4.5 - 5.5 volts, go to the next step. If the voltage is not 4.5 - 5.5 volts, replace ECM and retest.
2. back-probeECM connector on A/T models measure voltage between terminals #15 (red/blue wire) and #22 (brown/black wire) at ECM E6. on M/T models measure voltage between terminals #4 (red/blue wire) at ECM E5 and connector #9 (brown/black wire) at ECM E6 connector. on all models disconnect the vacuum hose from the vapor pressure sensor. sensor is located near the brake master cylinder. connect a vacuum pump to sensor. if voltage is 2.9-3.7 volts without vacuum applied and 1.3-2.1 volts with .59 in.Hg (2kpa) vacuum applied. replace ECM and retest if voltage is not as specified go to next step.
3. check for open r short circuit in the wiring harness between vapor pressure sensor and ECM. repair wiring as necessary. if wiring harness is okay replace the vapor pressure sensor.
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 [email protected]
Radio Constant 12V+ Wire: Blue/Yellow
Radio Switched 12V+ Wire: Gray
Radio Ground Wire: Brown
Radio Illumination Wire: Green
Radio Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amp Trigger Wire: N/A
Front Speakers Size: 4′
Front Speakers Location: Dash
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Purple
Right Front Speaker Wire (-): Light Green
Rear Speakers Size: 4′
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White
did u know that they make a harness for your car that plugs into your factory harness and then adapts to your aftermarket radio? for the lights, you have blown the interior light fuse, it may be the same fuse as the cigar lighter.Below is your radio wire colors and what they do. 1990 Toyota Corolla Car Stereo Radio Wiring Diagram.
Radio Constant 12V+ Wire: Blue/Yellow Radio Switched 12V+ Wire: Gray Radio Ground Wire: Brown Radio Illumination Wire: Green Radio Dimmer Wire: N/A Radio Antenna Trigger Wire: N/A Radio Amp Trigger Wire: N/A Front Speakers Size: 4′ Front Speakers Location: Dash Left Front Speaker Wire (+): Pink Left Front Speaker Wire (-): Purple Right Front Speaker Wire (+): Purple Right Front Speaker Wire (-): Light Green Rear Speakers Size: 4′ Rear Speakers Location: Rear Deck Left Rear Speaker Wire (+): Black Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Red Right Rear Speaker Wire (-): White
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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.
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