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What voltage does the injector need? - 2005 Suzuki RM-Z 450

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Posted on Jul 17, 2009

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Hi can you tell me what voltage the ecm needs to open the injectors. 2007 90hp efi mercury. engine number 1B5000268. THANKS BRIAN..


The injectors work on 12 volts but the voltage of the signal from the ECM to the injector trigger is between 3 and 5 volts only.

Jan 06, 2017 | Cars & Trucks

2 Answers

Hyundai santa fe 2001


Car error codes::


Diagnostic Trouble Code Storage Condition Remedy
P0100 Mass Air Flow Sensor Voltage High C-8
P0100 Mass Air Flow Sensor Voltage Low C-8
P0110 Intake Air Temperature Voltage High C-10
P0110 Intake Air Temperature Voltage Low C-10
P0115 Coolant Temperature Voltage High C-9
P0115 Coolant Temperature Voltage Low C-9
P0120 Throttle Position Sensor (TPS) Voltage High C-7
P0120 Throttle Position Sensor (TPS) Voltage Low C-7
P0130 O2 Sensor 1 Circuit Voltage High C-30
P0130 O2 Sensor 1 Circuit Voltage Low C-30
P0130 O2 Sensor 1 Open Circuit C-30
P0150 O2 Sensor 2 Circuit Voltage High C-31
P0150 O2 Sensor 2 Circuit Voltage Low C-31
P0150 O2 Sensor 2 Open Circuit C-31
P0201 Injector Valve 1 Voltage High C-20
P0201 Injector Valve 1 Voltage Low C-20
P0201 Injector Valve 1 Open Circuit C-20
P0202 Injector Valve 2 Voltage High C-21
P0202 Injector Valve 2 Voltage Low C-21
P0202 Injector Valve 2 Open Circuit C-21
P0203 Injector Valve 3 Voltage High C-22
P0203 Injector Valve 3 Voltage Low C-22
P0203 Injector Valve 3 Open Circuit C-22
P0204 Injector Valve 4 Voltage High C-23
P0204 Injector Valve 4 Voltage Low C-23
P0204 Injector Valve 4 Open Circuit C-23
P0205 Injector Valve 5 Voltage High C-24
P0205 Injector Valve 5 Voltage Low C-24
P0205 Injector Valve 5 Open Circuit C-24
P0206 Injector Valve 6 Voltage High C-25
P0206 Injector Valve 6 Voltage Low C-25
P0206 Injector Valve 6 Open Circuit C-25
P0230 Fuel Pump Relay Voltage High C-6
P0230 Fuel Pump Relay Voltage Low C-6
P0230 Fuel Pump Relay Open Circuit C-6
P0325 Knock Signal Circuit 1 C-26
P0330 Knock Signal Circuit 2 C-26
P0335 No Engine RPM Signal C-32
P0335 Incorrect RPM Signal C-32
P0340 Hall Sensor Voltage High C-15
P0340 Hall Sensor Voltage Low C-15
P0403 EGR Valve Voltage High C-28
P0403 EGR Valve Voltage Low C-28
P0403 EGR Valve Open Circuit C-28
P0410 Secondary Air Pump Voltage High C-27
P0410 Secondary Air Pump Voltage Low C-27
P0443 Fuel Tank Ventilation Valve Voltage High C-29
P0443 Fuel Tank Ventilation Valve Voltage Low C-29
P0443 Fuel Tank Ventilation Open Circuit C-29
P0500 Vehicle Speed Signal C-42
P0505 Idle Air Control Voltage High C-33
P0505 Idle Air Control Voltage Low C-33
P0550 Power Steering Voltage High C-14
P0550 Power Steering Voltage Low C-14
P0560 Battery Voltage High C-4
P0560 Battery Voltage Low C-4
P0602 Control Module Programming Error C-2
P1110 Intake Manifold Valve 1 Voltage High C-34
P1110 Intake Manifold Valve 1 Voltage Low C-34
P1111 Intake Manifold Valve 2 Voltage High C-35
P1111 Intake Manifold Valve 2 Voltage Low C-35
P1230 Power Supply Relay Secondary Circuit C-3
P1405 EGR Valve Feedb. Voltage High C-28
P1405 EGR Valve Feedb. Voltage Low C-28
P1405 EGR Valve Feedb. Incorrect Signal C-28
P1501 Immobiliser No or Wrong Coding C-5
P1502 Immobiliser No Signal C-5
P1503 Immobiliser Wrong Signal C-5
P1530 A/C Relay Voltage High C-41
P1530 A/C Relay Voltage Low C-41
P1600 Reprogram or Replace Electronic Control Unit (ECU) C-2
P1602 Knock Control Module; Replace ECU C-2
P1690 Check Light Voltage High C-43
P1690 Check Light Voltage Low C-43
P1690 Check Light Open Circuit C-43
P1740 Torque Control Voltage Low C-40
P1740 Continuous Torque Control C-40

These are the error codes:

Jul 08, 2008 | 2001 Hyundai Santa Fe

1 Answer

05 Cad SRX. Codes PO261, PO 267, PO 273. Injector control circuit low. This is right bank on 3.6. Any ideas what to look for


Check fuse in under hood fuse box .Odd coils 15amp . This fuse powers both fuel injectors an coils on that bank.
The control module enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition voltage is supplied directly to the fuel injectors. The control module controls each fuel injector by grounding the control circuit with a solid state device called a driver. The control module monitors the status of each driver. Each driver has a feedback voltage circuit which the engine control module (ECM) monitors. The injector control circuits are pulled-up to voltage within the ECM . The ECM can determine if a control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage. If the ECM detects the control circuit voltage is too low when the circuit is commanded OFF, this DTC sets.
Shorted injector's ? Go on you tube an check out videos on testing GM injectors by scanner Danner . He teaches automotive training classes .
Injector Circuit Wiring Diagram

Mar 07, 2016 | Cars & Trucks

1 Answer

Fuel injector voltage


voltage is battery voltage at the injector at all times.

Sep 04, 2014 | 2003 Dodge Dakota Club Cab

1 Answer

Fuel injectors not working


Check voltage at the injectors with key on. Voltage should always be available to injectors with key on. When the ecu grounds the injector circuit internally, for a split second, the injector will pulse, spraying fuel. You can buy a "noid" light to test injector circuit, one that fits your injector connector. To test, you crank the engine over, noid light should be blinking.
Or, use a test light and check injector drive circuit. With key on, one injector terminal should have constant battery voltage-test light should be lit bright. Now move ground clip of test light to the POSITIVE battery post, and probe the other injector terminal, the one that did not light the test light. Have someone crank the engine-if injector circuit is working, the test light will be blinking, indicating the ecu is grounding the injector circuit.
If no voltage to injectors, the drive circuit and wiring needs checked. If no ground signal, the wiring and the ecu needs checked.

Jul 07, 2013 | Toyota Cars & Trucks

1 Answer

1994 Chevy lumina euro no injector pulse


You have to determine if the problem is the injector drive circuit, or the injector ground circuit. Pull off one injector connector and check for voltage on one of the two wires to the injector. Turn the key to on and check with a meter or a testlight-one wire should have constant voltage, meaning the injector drive circuit is working, and the problem must be the computer not properly grounding the injector ground circuit. If no power to the injector with key on, then the drive circuit has failed. A shorted injector can shut down the drive circuit, so pull off all the injector connectors, and recheck for voltage at one of the injector connectors (with key on). If still nothing, check the injector fuse. If fuse is good, you will have to have the injector drive circuit diagnosed for a problem.

Sep 26, 2012 | Cars & Trucks

1 Answer

Wont start


No. If the connector only reads at 8 volts, the current draw would be too excessive for the computer to maintain their operation. You need at least 10 volts with adequate current.

Are you measuring the voltage across the injector? or across the connector with no injector installed. If the injector is installed in the circuit, the 8 volts should be fine as you measurig the voltage drop across the injector.

Dec 22, 2011 | 1995 Chevrolet C/K 2500

1 Answer

1996 buick park ave, wont start, has spark but no voltage at injectors...


Spark indicates crank sensor, ignition coils and modules-ok
no voltage at injectors; should be 12v in each of the injector wires (not the black one) with key on engine off. Voltage provided to injectors comes from injector driver circuit inside PCM, and pulses ground signals to open and close injectors.

Aug 26, 2011 | Buick Park Avenue Cars & Trucks

1 Answer

The engine won`t start. Fuelpressure OK. Will start with startgas as long as gas sprays into air cleaner.


Sounds like injectors are not firing, check fuse of the injectors, check voltage of injectors if fuse is okay, voltage should be around 5V. If okay, you can check the ground side of injectors with a noid lite. If voltage is there, and no ground side, computer issue, or bad wiring. A good scanner can see if the injector voltage is okay.

May 25, 2010 | 1990 Mitsubishi Galant

1 Answer

I have a check enigne light that is on and two codes pop up P0204 & P0839 connie.hamm@texascellnet.com


P0204 - Cylinder 4 Injector Circuit Malfunction

P0204 means that the Power Control Module (PCM) detected a fault in the injector or the wiring to the injector. It monitors the injector and when the injector is activated, the PCM expects to see the voltage pulled "low" or close to zero. When the injector is switched off, the PCM expects to see a voltage that is close to battery voltage or "high". If it doesn't see the expected voltage the PCM will set this code. The PCM also monitors resistance in the circuit. If the resistance is excessively low or high it will set this code.

The causes of a P0204 engine light code could be any of the following:

Bad injector. This is usually the cause of this code but doesn't rule out the possibility of one of the other causes
Open in the wiring to the injector
Short in the wiring to the injector
Bad PCM

Possible Solutions
First, using a DVOM check the resistance of the injector. If it isn't within specs, then replace the injector.
Check for voltage at the fuel injector connector. It should have 10 volts or more.
Visually check the connector for damage or broken wires.
Visually check the injector for damage.
If you have access to an injector tester, activate the injector and see if it operates. If the injector operates, then you likely have either an open in the wiring, or a blocked injector. If you do not have access to a tester, swap the injector with another one and see if the code changes. If the code changes, then change the injector.
At the PCM, remove the driver wire from the PCM connector and Ground the wire. (Make sure you have the correct wire. If you're not sure, do not attempt) The injector should activate
Replace the injector

P0830 Four Wheel Drive (4WD) Switch Circuit High
I can't find any solutions for this error code. You'll definitely need a mechanic to help wiht this code.

Jan 13, 2010 | 2005 Jeep Liberty

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