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02 merc stalled checked relays fuses dtr pcm starter and patwill not engage starter keys trans ok also no burnt wires checked all but ignition switch need help

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If you want help you need to explain a little better . When you turn the key to start , the starter doesn't engage , correct ? On top of the instrument pane is there a little red light flashing when you try starting the vehicle ? Need to know model so I can look at wiring diagram .

Posted on Dec 19, 2016

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Posted on Jan 02, 2017

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My 2001 Pontiac montana has power but wont start


Do you know how to test automotive electrical circuits ? Do you know what a electrical wiring diagram is. Have a DVOM - digital volt ohm meter ? How about a automotive relay , do you know what it is an how it works ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model ,engine . Under system click on engine , then under subsystem click on starting. Click the search button ,then the blue link . You will see all the componets involved in starting the vehicle. ignition switch , starter range switch , starter relay , PCM -powertrain control module . When you turn the ignition switch to the start position it sends a voltage signal to the PCM , this tells the PCM start is requested , in turn the PCM energize's the starter relay . This will close contacts inside the relay allowing B+ voltage at pin 30 of the relay to go to the starter solenoid . engaging the starter . Checking fuse's an power an ground , testing relay control . . Videos on youtube for electrical testing.
Electric Testing Techniques You Need to Know
Relays Understanding Diagnosis and Testing Relayed Circuits Pt1

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02merc mountaineer stalled while driving ive checked relays fuses pcm dtr wiring and starter and solenoid will not crank or fire {pat} also, all check ok new bat every thing else functions


PATS uses a visual theft indicator. This indicator will prove out for three seconds when the ignition switch is turned to RUN or START under normal operation. If there is a PATS problem, this indicator will either flash rapidly or glow steadily when the ignition switch is turned to RUN or START. PATS also "blips" the theft indicator every two seconds at ignition OFF to act as a visual theft deterrent.

Dec 19, 2016 | Cars & Trucks

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Awd merc 02 stalled in gear wont crank or fire starter pcm dtr and relays all ok transponder in keys ok ignition relay ok think ignition switch problem ? bench tested starter new bat no burned wires


Awd merc 02 ????? Mercury what ? Transmission range switch is input to the PCM . If the PCM thinks it's in gear I would look at this part . Read input data from range switch to PCM on a scan tool that can do that . Transceiver for Pats is around the ignition lock cylinder behind plastic cover ,

Dec 19, 2016 | Cars & Trucks

1 Answer

2002 mercury mountaineer stalled while in gear will not engage the starter coil pack all fuses relays dtr pcm starter pat ignition tumblers or ignition switch left to troubleshoot help please


Could you brake down your long paragraph ? Not sure what you have checked and what you need to check.

Please add more detail information as to your problem, what have you done as diagnosis, if any at all.

Dec 19, 2016 | 2002 Mercury Mountaineer

1 Answer

Where is the location of my starter relay ********* fuse on a 2003 Chrysler Sebring sedan


WARNING: CHECK TO ENSURE THAT THE TRANSMISSION IS IN THE PARK/NEUTRAL POSITION WITH THE PARKING BRAKE APPLIED.

RELAY TEST
The starter relay is located in the Power Distribution Center (PDC) in the engine compartment. Refer to the PDC label for relay identification and location.

Remove the starter relay from the PDC as described to perform the following tests:
  1. A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 2. If not OK, replace the faulty relay.
  2. Resistance between terminals 85 and 86 (electromagnet) should be 75 ±5 ohms . If OK, go to Step 3. If not OK, replace the faulty relay.
  3. Connect a battery B+ lead to terminals 86 and a ground lead to terminal 85 to energize the relay. The relay should click. Also test for continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, refer to Relay Circuit Test procedure. If not OK, replace the faulty relay.
RELAY CIRCUIT TEST
  1. The relay common feed terminal cavity (30) is connected to battery voltage and should be hot at all times. If OK, go to Step 2. If not OK, repair the open circuit to the PDC fuse as required.
  2. The relay normally closed terminal (87A) is connected to terminal 30 in the de-energized position, but is not used for this application. Go to Step 3.
  3. The relay normally open terminal (87) is connected to the common feed terminal (30) in the energized position. This terminal supplies battery voltage to the starter solenoid field coils. There should be continuity between the cavity for relay terminal 87 and the starter solenoid terminal at all times. If OK, go to Step 4. If not OK, repair the open circuit to the starter solenoid as required.
  4. The coil battery terminal (86) is connected to the electromagnet in the relay. It is energized when the ignition switch is held in the Start position and the clutch pedal is depressed (manual trans). Check for battery voltage at the cavity for relay terminal 86 with the ignition switch in the Start position and the clutch pedal is depressed (manual trans), and no voltage when the ignition switch is released to the ON position. If OK, go to Step 5. If not OK, check for an open or short circuit to the ignition switch and repair, if required. If the circuit to the ignition switch is OK, see the Ignition Switch Test procedure.
  5. The coil ground terminal (85) is connected to the electromagnet in the relay. It is grounded through the transmission range sensor only when the gearshift selector lever is in the Park or Neutral positions. Check for continuity to ground at the cavity for relay terminal 85. If not OK with an automatic transmission, check for an open or short circuit to the transmission range sensor and repair. It is grounded by the PCM if the conditions are right to start the car. For automatic trans. cars the PCM must see Park Neutral switch and near zero engine rpm. For manual trans. cars the PCM only needs to see near zero engine rpm. To diagnose the Park Neutral switch of the trans range sensor refer to the transaxle section for more information. Check for continuity to ground while the ignition switch is in the start position. If not OK and the vehicle has an automatic trans. verify Park Neutral switch operation. If that checks OK check for continuity between PCM and the terminal 85. Repair open circuit as required. If OK, the PCM may be defective

location-starter-relay-big-black-fuse-gbf3labirtd4je1xpy3iayqy-4-0.jpg This should get you going on the diagnosis.

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1 Answer

2009 chevy equinox . No starter engagement.no communication with pcm .changed pcm and tried to program.all relays and fuses are good.help


check key if worn nox wont read it same with ignition switch if worn may not engage ignition system if you changed the pcm it needs to be flashed they are vehicle specific

Aug 10, 2016 | Cars & Trucks

1 Answer

Where is starter cable under dash of 2000 Buick lesabre


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1 Answer

How do i fix a no start by key ignition


Well you need to find a wiring diagram to see what all is involved in the starter circuit , Ignition Switch , neutral safety switch , A relay ! An does the PCM /ECM control or energize the relay . If there is a relay it is more then likely in the under hood fuse/relay box . Do you know what an automotive relay Is ? VEHICLE RELAYS Operation Diagnosis

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1 Answer

Car won't start when I turn the key to start the #10 fuse engine relay pops I checked every thing down to the fuel pump and every thing is fine the few times I got it started I took it around the block and...


I had a similar problem where the battery was ok but there was no sound from the starter and also there no lights on in the dash when the key was turned. Checked the fuse and checked wire from the fuse back to the ignition switch. The wire from the fuse was ok in fuse box but had no voltage at the ignition sw. The was also no voltage to terminal 30 in the starter relay. Ran a new wire from the fuse to the ignition and it fixed everything. Check for voltage at terminal 30 on the starter relay

Feb 24, 2011 | 2000 Dodge Neon

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