Question about 1993 Chevrolet Suburban

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I have an error code of 53 on my 93 suburban. checking the voltage at the battery while running is 14.4 volts same voltage at the pcm checking and fixing every little possible thing related has not helped. already checked all connections, starter, alternator and charging system. clearing the codes and not starting the truck at all still gives me a code 53.. is my pcm in need of replacement or i have i missed something.? nutz

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The 14.4 is high but not unusually so. The code may have been produced by glitch or a failing regulator or a corroded connector. That higher voltage shouldn't remain that high once the battery is charged. A charged battery should have very close to 12.6 ( I have often measured 12.65) volts with no load and no charging current.

Posted on Oct 08, 2009


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I replaced alternator on my 01 dodge stratus, but car still isn't putting off enough volts to stay i need to reset the comp code? Or is it something else?

Did you test for B+ voltage at heavier gage wire on the back of the alternator ? Also pin 1 at the connector, a orange with dark green stripe wire should have B+ voltage . Fuse #25 20amp in the under hood fuse box. The heavier gage wire has a fusible link in the wire , comes from starter solenoid . The last wire in the connector , a dark green wire comes from the PCM - engine computer . You can replace the alternator how ever many times you like , but if there is any B+ voltage at the place's I mentioned it's not going to charge ! Plus if the PCM is turning it on it's not going to work . There are videos on youtube for testing charging systems.

Oct 06, 2016 | 2001 Dodge Stratus

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The PT cruiser uses a field signal from the PCM to regulate the voltage. If you are not getting approximately 14 volts at the battery terminals when the engine is running, either:
  1. The replacement alternator is faulty.
  2. The generator field control signal from the PCM is faulty.
  3. The Fusible Link between the alternator and the Starter Motor (which is also the same electrical point as the battery positive terminal is open.
Use the diagram below and check the alternator output at the point labeled "A11 6 BK/GY" If this is 14 volts and there is not 14 volts at the battery terminals, then the Fusible link is bad. If there is no voltage or way less than 15 volts at the alternator, then the alternator or the PCM field signal is bad. Ensure the connector from the PCM is connected properly.


Sep 27, 2015 | 2003 Chrysler PT Cruiser

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I have95cadyceville pcm tells me high volts theres one wire off the back of alt true? Change alt will solve?

check voltage manually with volt meter check at the battery and check off the charge wire coming off the alternator should be 13-14 volts +/- anything over 14 volts would be to high a voltage

Apr 21, 2015 | Cars & Trucks

1 Answer

Replace voltage regulator 2000 suburban 1500

You don't say what year your truck is but since the 70's the alternator and voltage regulator are housed together. Use a voltmeter to check the output from the alternator to a good battery when running it should be putting out 13-14 volts if not there is your problem.

Jan 17, 2013 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

Battery light comes on and car dies

the battery light comes on to tell you there is a problem with the charging system.

Check the voltage at the battery with the vehicle running. You should see more than 14 volts. If its less than the alternator is likely not charging.

Mar 14, 2012 | 1994 Chevrolet Suburban

1 Answer

I have a 1993 Chevrolet Suburban The engine (new) has been dragging (at times) when starting for a month or so. Now it will not turn over at all, nothing. The battery is good however it only reads 9 volts...

its a possibility that the alternator is shoot, and you do not have the power to turn engine over to start it. if battery is ok ! then get vehicle started. all accessories off,with it running you should have at least 14.2-14.7 voltage at battery. if you do not have a way to check this. auto-zone will check for free, as well as advanced auto.if all is ok, and the voltage running is less the 14 volts. replace alternator. good-day !

Sep 25, 2011 | 1993 Chevrolet Suburban

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My daughter has a 2002 PT Cruiser w/ 2.0 engine. auto/trans non turbo.I'm NOT much on the new cars.It keeps running the battery down or does not charge it.They took it to a garage in this area,which none...

I doubt it is the PCM, though it could be, as the voltage is regulated by the PCM. It could also be the fusible link. There is a way to test, if you have a voltmeter. With the engine running, check the voltage at the alternator terminal. It should be at least 14 volts or more. Also check it at the battery. It should be the same. If lower at the battery, replace the fusible link.
If it's the same at the battery and both are above 14 volts, the charging circuit is probably fine and the problem may be a short in the car. I can send troubleshooting steps for a short if someone is good with electric circuits.
If the voltage is lower than 14 at the alternator terminal, then either the alternator is bad or the PCM is bad, and your mechanic may be right.

Sep 29, 2010 | 2002 Chrysler PT Cruiser

1 Answer

Check engine light appears after 30 minutes of


1. Cycle the ignition key ON-OFF-ON-OFF-ON within 5 seconds. To cycle the ignition key ON means to turn it only as far as it takes to get the radio to come on. It does not mean to turn the engine on.

2. Count the number of times the "check engine" lamp on the instrument panel flashes on and off. The number of flashes represents the code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses separate individual codes. For example, flash-flash-flash [pause] flash-flash represents the code 32.

A code of "55" represents end of error codes. If this is all you get then no error codes are stored in the computer. This is the normal condition

CODE Description of Trouble Code
11 Timing belt skipped 1 tooth or more from initial learned value, Intermittent loss of either camshaft or crankshaft position sensor, No crank reference signal detected during engine cranking
12 Direct battery input to PCM was disconnected within the last 50 key-on cycles (normal)
13 No change in MAP from start to run
14 MAP sensor voltage too low
15 No vehicle speed sensor signal
17 Closed loop temp not reached or engine cold too long
21 02s sensor problem (oxygen sensor), upstream or down stream
22 Engine coolant temp sensor out of range
23 Intake air temp sensor out of range
24 Throttle Position sensor out of range
25 Idle air control motor circuits, target idle not reached (+/- 200),vacuum leak found
27 Injector control circuit
31 Evap purge flow monitor failure or evap solenoid circuit
32 EGR system failure
33 A/C clutch relay circuit
34 Speed control Solenoid circuits
35 Rad Fan control relay circuit
37 Torque converter clutch solenoid CKT or park/neutral switch failure
41 Generator field not switching properly
42 Fuel pump relay control ckt, Auto shutdown relay control ckt, No ASD relay output voltage at PCM, Fuel level sending unit volts out of range, Fuel level unit No change over miles
43 Multiple/ single cylinder misfire
44 Battery temp sensor volts out of range
46 Charging system voltage too low
51 Fuel system lean
52 Fuel system rich
53 Internal control failure
54 No Cam signal at PCM
55 End of error messages (If you get this only, no errors were found)
62 PCM failure SRI mile not stored
63 PCM Failure EEPROM write denied
64 Catalytic Converter Efficiency Failure
65 Power steering switch failure

Jul 21, 2010 | 1995 Chrysler Concorde

1 Answer

When a/c is on car hesitates and sometimes cuts off 2006 dodge stratus 2.4 liter

Check the voltage on battery with a volt meter with car running. Voltage should be between 14-15 volts. If not then the pcm on car is causing the problem. The pcm (power control module is regulating the voltage from the alternator and you will need to carry it to a shop to see if the pcm can be reset or replaced. If the voltage is correct then the battery is at fault and you will need to replace the battery. Any battery that is a least 4 years old should be replaced and would not hold a charge. Hope this will help you.

Jun 03, 2010 | 2002 Dodge Stratus

1 Answer

Starter 20 amp fuse blows some times when starting car, replaced starter it helped but did not solve problem. It blows most the time after it has been driven and shut down for a short time. Was told that...

The pcm does control the voltage from the altenator through the electrical system. Chances are the pcm is going bad, need to have it checked and or replaced to correct the problem. Check the electrical wireing from the battery to the starter solenoid. Find yourself a volt meter and check the voltage on battery while you have someone try to start the motor (cold) and then again while it has been run and the motor is hot. Normal voltage reading during the time the engine is running is 14-15 volts and during starting nothing less than 10 volts.The problem also could be the battery connections or the battery itself. The only way is to check the voltage on system to give you an idea. Hope this will help you.

May 23, 2010 | 2001 Dodge Stratus

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