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  • Cars & Trucks Master
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Dead battery alternator out which is it??

Posted on Dec 31, 2013

  • Jeanne Williams
    Jeanne Williams Dec 31, 2013

    I apologize, I accidently hit the enter button before I was done providing info in my original post- This is my problem.. have a 1998 Pontiac sunfire that failed emissions, the Vehicle inspection report shows everything as *pass, except for the following... OBD readiness monitor status: *unavavailable, did not communicate, OBD connector integrity: *Fail, Malfunction indicator light (mil) status / No Voltage: *Fail. Under the diagnostic trouble code report area it states the following: Your vehicle reported no voltage at the data link connector (computer connection). The check engine light was on, but we replaced the cigarette lighter fuse, and the light went off, took back to emissions, and it still failed. Please help!! Any solutions or advice you can provide on what may be causing this problem? With the exception of a power steering fluid leak, the car runs pretty good. Has 280K miles

  • Jeanne Williams
    Jeanne Williams Apr 01, 2014

    ended up being the fuse for the horn

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EZGO TXT, what is the voltage I should see at the battery while engine running under load?


Around 15 + or - a little. This indicates the alternator is charging.

Oct 18, 2017 | Cars & Trucks

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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

Headlights will not come on but park light work and no single light work. Fuses are good.


Check for battery voltage at head light socket , if voltage replace bulb, if no voltage check voltage at light side of relay if ok check wiring to lights, if no voltage check switch side of relay if voltage replace relay, if no voltage check voltage at head light switch , both to and from switch, if faulty replace.

Jun 22, 2015 | Cars & Trucks

1 Answer

It showing code 41. Generator field not switching properley.


This trouble code sets when the Powertrain Control Module (PCM) tries to regulate the generator field with no result during monitoring.
The PCM tries to maintain a system voltage between 12.9 volts and 15.0 volts. The voltage determined by the PCM as the final goal for the charging system is called "control" voltage. This control voltage is determined from the battery temperature sensor for ambient sensor and the sensed voltage system voltage at PCM pin #11.
The control voltage is compared to the sensed voltage continuously during running. If the sensed voltage is less than the control voltage, the PCM will supply more ground to the field circuit. If the sensed voltage is more than the control voltage, the PCM will supply less ground to the field circuit.
There are three possible causes for this, the field driver circuit open or shorted, there is an alternator internal open or short os a PCM failure

Jun 04, 2015 | Cars & Trucks

1 Answer

1994 Jetta head lights fuse's are right but no lights


Check for voltage at the headlight connectors with the light switch turned on. If there is voltage but your lights do not illuminate, your bulbs are burned out. If there is no voltage, verify that there is supply voltage at the output of the light switch when lights are turned on. No output voltage, first check continuity between the switch and the lights, then check for voltage at the switch input. If there is input voltage but no output voltage, replace the switch. If there is no input voltage, check the wiring between the fuse panel and the switch.

May 07, 2015 | Cars & Trucks

1 Answer

Ignition system wiring, voltage, regulator how to repair


Hello, again, again Bridget. First I sent you explanation of the ignition system and I gave you my best guess---ignition module on your 1994 Plymouth with V6 3.4 L engine.

As far as voltage regulation goes there isn't any external devise to do this. This voltage voltage regulation take place inside the alternator after the three phase AC voltage is turn into none regulated DC voltage. Now this DC voltage goes thru a voltage regulator that built into the alternator where the output DC voltage is 13.8 to 14.1 DC Volts. Now, the alternator is regulated for current by the it wire windings in the alternator. Larger the copper wire the more current the alternator will produce. GB.....stewbison

Oct 17, 2011 | 1994 Plymouth Voyager

2 Answers

There is a ground some were that is causeing the battery not to charge put new selinoid ,new battery,alternater,new key lock cylender check wirers fuses relay switches and battery still wont charge


It sounds like you have done a whole lot of replacing and not much "diagnosing". Did you chech for battery voltage at the alternator? There should be battey voltage at the large Black/Orange wire that is on the B+ terminal of the alternator. This wire should have voltage all the time. If there is no battery voltage, you most likely have a burned fusible link at the starter relay area.
There should also be voltage at the "S" terminal with the ignition on. If there is no voltage, then check for voltage at the "S" terminal of the voltage regulator. If there is no voltage at the "S" terminal on the voltage regulator then check the "I" terminal on the regulator for voltage.

NOTE: The voltage on the "S" terminal should be 1/2 that of the voltage on the "I" terminal.

If there is voltage on the "I" terminal, make sure your voltage regulator is grounded properly to the fender and retest to see if it is charging the battery. If it is still not charging, disconnect the regulator connector and connect a jumper between the "A" and "F" terminals of the connector. Start the engine. The alternator should now be charging the battery at high voltage (usually over 15 volts) If it does, replace your voltage regulator. If it does not, then you need to check your wiring between the voltage regulator and the alternator.

Please also review this article:

What Else Could Be Wrong?

Jun 15, 2011 | 1987 Ford F 150

1 Answer

05 dodge cummins,driving down roadway ,throttle will climb erratically for about 3-4 seconds when coming to a stop, it has electrical throttle connections ,no cables that i can see. When parked idling and...


To retrieve OBDII Error codes from your Chrysler/Jeep/Dodge vehicle, do the following sequence with the key: ON-ACC-ON-ACC-ON and look at the odometer, that is where codes will be displayed. Here are the codes that you may/can get.

Ho2S = heated oxyen sensor, TP = throttle position, MAF = mass airflow, MAP = manifold absolute pressure, TC=turbocharger.
P0030 HO2S Heater Control Circuit Bank 1 Sensor 1
P0031 HO2S Heater Circuit Low Voltage Bank 1 Sensor 1
P0032 HO2S Heater Circuit High Voltage Bank 1 Sensor 1
P0036 HO2S Heater Control Circuit Bank 1 Sensor 2
P0037 HO2S Heater Circuit Low Voltage Bank 1 Sensor 2
P0038 HO2S Heater Circuit High Voltage Bank 1 Sensor 2
P0050 HO2S Heater Circuit Bank 2 Sensor 1
P0051 HO2S Heater Circuit Low Voltage Bank 2 Sensor 1
P0052 HO2S Heater Circuit High Voltage Bank 2 Sensor 1
P0056 HO2S Heater Circuit Bank 2 Sensor 2
P0057 HO2S Heater Circuit Low Voltage Bank 2 Sensor 2
P0058 HO2S Heater Circuit High Voltage Bank 2 Sensor 2
P0100 MAF Sensor Ckt. Insufficient Activity
P0101 Mass Air Flow (MAF) Sensor Performance
P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
P0104 Mass Air Flow Circuit Intermittent
P0105 MAP Sensor Circuit Insufficient Activity
P0106 Manifold Absolute Pressure (MAP) System Performance
P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
P0108 Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
P0109 Manifold Absolute Pressure Circuit Intermittent
P0110 Intake Air Temperature (IAT) Sensor Circuit
P0111 Intake Air Temperature (IAT) Sensor Performance
P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage
P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage
P0114 Intake Air Temperature Circuit Intermittent
P0115 Engine Coolant Temperature (ECT) Sensor Circuit
P0116 Engine Coolant Temperature (ECT) Sensor Performance
P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
P0119 Engine Coolant Temperature Circuit Intermittent
P0120 Throttle Position System Performance
P0121 Throttle Position Sensor Circuit Insufficient Activity
P0122 Throttle Position (TP) Sensor Circuit Low Voltage
P0123 Throttle Position (TP) Sensor Circuit High Voltage
P0124 Throttle Position Sensor 1 Circuit Intermittent
P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control
P0126 Insufficient Engine Coolant Temperature for Stable Operation
P0128 Coolant Thermostat
P0130 HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 1
P0131 HO2S Circuit Low Voltage Bank 1 Sensor 1
P0132 HO2S Circuit High Voltage Bank 1 Sensor 1
P0133 HO2S Slow Response Bank 1 Sensor 1
P0134 HO2S Circuit Insufficient Activity Bank 1 Sensor 1
P0135 HO2S Heater Performance Bank 1 Sensor 1
P0136 HO2S Circuit Bank 1 Sensor 2
P0137 HO2S Circuit Low Voltage Bank 1 Sensor 2
P0138 HO2S Circuit High Voltage Bank 1 Sensor 2
P0139 HO2S Slow Response Bank 1 Sensor 2
P0140 HO2S Circuit Insufficient Activity Bank 1 Sensor 2
P0141 HO2S Heater Performance Bank 1 Sensor 2
P0142 HO2S Circuit Bank 1 Sensor 3
P0143 HO2S Circuit Low Voltage Bank 1 Sensor 3
P0144 HO2S Circuit High Voltage Bank 1 Sensor 3
P0145 HO2S Circuit Bank 1 Sensor 2 Slow Response
P0146 HO2S Circuit Insufficient Activity Bank 1 Sensor 3
P0147 HO2S Heater Performance Bank 1 Sensor 3
P0150 HO2S Circuit Closed Loop (CL) Performance Bank 2 Sensor 1
P0150 HO2S Circuit Bank 2 Sensor 1
P0151 HO2S Circuit Low Voltage Bank 2 Sensor 1
P0152 HO2S Circuit High Voltage Bank 2 Sensor 1
P0153 HO2S Slow Response Bank 2 Sensor 1
P0154 HO2S Circuit Insufficient Activity Bank 2 Sensor 1
P0155 HO2S Heater Performance Bank 2 Sensor 1
P0156 HO2S Circuit Bank 2 Sensor 2
P0157 HO2S Circuit Low Voltage Bank 2 Sensor 2
P0158 HO2S Circuit High Voltage Bank 2 Sensor 2
P0159 HO2S Slow Response Bank 2 Sensor 2
P0160 HO2S Circuit Insufficient Activity Bank 2 Sensor 2
P0161 HO2S Heater Performance Bank 2 Sensor 2
P0162 HO2S Circuit Bank 2 Sensor 3
P0163 HO2S Circuit Bank 2 Sensor 3 Low Voltage
P0164 HO2S Circuit Bank 2 Sensor 3 High Voltage


P




Dec 18, 2010 | 2005 Dodge Ram 2500 Truck

1 Answer

Put new battery in car and it wont even try to turn over. Is it the starter?


Check voltage at starter, there's a big wire and a small one, the big wire should have voltage all the time, the small one will only have voltage when key is at start, with test light check voltage at big wire, if no voltage check battery terminal's, if there is voltage then check voltage at small wire while some one hold's ignition key to start if you have voltage bad starter, also hit starter while key is at start some time's it will crank engine over, but you'll need to replace starter, if no voltage check ignition switch, good luck, hope this was very helpful.

May 19, 2010 | 1997 Honda Accord

1 Answer

93 Ford F250 5.8 L No Charge


not cpu.
Do not field out the field wire.
Is the alternator ight coming on?
If you rev engine, does charging system start working?
There is a resister wire that provides voltage to the field circuit. If the resister is bad, you will only get voltage to the field through the dash alt. light bulb when you push enough voltage through it.

I don''t have 1993, but here is 96:

Generator with Integral Rear Mount Regulator, Internal Fan Type With the key in the RUN position, voltage is applied through the charge indicator lamp I circuit to the voltage regulator. This turns the voltage regulator on, allowing current to flow from the battery sense A circuit to the generator field coil. When the engine (6007) is started, the generator (GEN) (10346) begins to generate alternating (AC) current which is converted to direct (DC) current by the rectifier internal to the generator. This current is then supplied to the vehicle's electrical system through the battery positive voltage (B+) terminal located on the rear of the generator. Once the generator begins generating current, a voltage signal is taken from the stator and fed back to the voltage regulator S circuit, turning off the charge indicator/lamp. With the system functioning normally, the generator output current is determined by the voltage at the A circuit. This voltage is compared to a set voltage internal to the voltage regulator, and the voltage regulator controls the generator field current to maintain proper generator output. The set voltage will vary with temperature and is typically higher in the winter than in the summer, allowing for better battery recharge. With the system functioning normally, the generator output current is determined by the voltage of the A circuit (battery sense voltage). The A circuit voltage is compared to a set voltage internal to the voltage regulator, which controls the generator field current to maintain proper output. The set voltage will vary with temperature and is typically higher in the winter than in the summer, allowing for better battery recharge in the winter and reducing the chance of overcharging the battery in the summer. A fuse link is included in the charging system wiring on all models. The fuse link is used to prevent damage to the wiring harness and generator if the wiring harness should become grounded, or if a booster battery with the wrong polarity is connected to the charging system.
-------------------------------------------------------------------------

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  • System Does Not Charge
  • Loose or worn drive belt.
  • Open/voltage drop in Circuit 38 (BK/O).
  • Open/voltage drop in Circuit 36 (Y/W).
  • Open/high resistance in Circuit 904 (LG/R).
  • Damaged regulator.
  • Damaged generator battery


Apr 13, 2009 | 1995 Pontiac Sunfire

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