Truck will crank but not start no lights are on and no codes come up. changed the ground terminal and now will not start

More then likely the BCM is what is keeping it from cranking . Anti-theft system light lit or flashing when trying to crank the engine ? Try putting gear selector in neutral to see if it cranks then , park neutral safety switch problem . Do you know what a wiring diagram is , need to view to see what all is involved in the cranking circuit .

STARTING SYSTEM PFP:23300 System Description EKS00F9V A/T MODELS Power is supplied at all times ? to starter motor terminal 2 and ? through 40A fusible link (letter. j , located in the fuse and fusible link box) ? to ignition switch terminal B. With the ignition switch in the START position, power is supplied ? from ignition switch terminal ST ? to IPDM E/R terminal 21. With the ignition switch in the ON or START position, power is supplied to IPDM E/R (intelligent power distribution module engine room) CPU. With the selector lever in the P or N position, power is supplied ? through A/T assembly terminal 9 ? to IPDM E/R terminal 48. Ground is supplied at all times ? to IPDM E/R terminals 38 and 59 ? through body grounds E9, E15 (all) and E24 (VQ40DE model). Provided that the IPDM E/R receives a starter relay request ON signal from the BCM over the CAN lines, the IPDM E/R grounds the starter relay and power is supplied ? from terminal 19 of the IPDM E/R ? to terminal 1 of the starter motor. The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates.

Your best bet mite be to have a qualified technician check it . Do you know what C.A.N serial data network is ?

https://www.nicoclub.com/FSM/Frontier/2007_Frontier/sc.pdf

What ECM code ? What is everything else that is working ? Headlamps , inside lighting , radio etc... When you turn the key on do the instrument cluster warning lights come on then off a few seconds later ? Anti-theft (security light ) On ? Flashing ? Do you know what all is involved ,or happens when you turn the key to start ?
Circuit Description (ECM/PCM Controlled)
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.


Verify that no starter relay, immobilizer, or automatic transmission DTCs are set that would cause the PCM to disable starting.
? If the specified DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Ignition ON, observe the scan tool PCM Ignition 1 Signal parameter with a scan tool. The reading should be greater than 10.0 Volts.
? If less than the specified value, test the ETC, PCM 1, and PCM B fuses, the RUN/CRNK relay, and the PCM ignition voltage circuits for an open/high resistance. If the circuits test normal, replace the PCM.
Ignition OFF, remove the START relay.
Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.
? If the test lamp does not illuminate, test the START fuse and the B+ circuit for an open/high resistance.
Ignition ON, transmission in Park or clutch pedal pressed, verify that a test lamp illuminates between the PNP/clutch start switch signal circuit terminal 86 and ground.
? If the test lamp does not illuminate, test the IGN fuse, RUN/CRANK relay, PNP/clutch switch ignition voltage circuit, and the signal circuit for a short to ground or an open/high resistance. If the circuits test normal, test or replace the PNP switch or the clutch start switch.
Connect a test lamp between the park/neutral signal circuit terminal 86 and the relay coil control circuit terminal 85.
Ignition ON, transmission in Park, or clutch pedal pressed, turn the ignition switch between the START and RUN positions. The test lamp should turn ON and OFF when changing between the commanded states.
? If the test lamp is always ON, test the relay control circuit for a short to ground. If the circuit tests normal, replace the PCM.
? If the test lamp is always OFF, test the relay control circuit for a short to voltage or an open/high resistance. Test the PNP/clutch start switch signal circuit for an open/high resistance. If the circuits test normal, replace the PCM.
Install the START relay.
Connect a test lamp between the starter solenoid terminal and ground.

The code has nothing to do with it not starting . Moving the ignition switch to the CRANK position sends a 12 V signal to the PCM Ignition Crank Sense. The PCM verifies that the transmission is in the PARK or NEUTRAL position. The PCM then grounds the control circuit of the START relay. When the START relay is energized it allows voltage to the starter solenoid S terminal. The clicking from the back seat are relays in the rear fuse box under the seat. You need too take it to the dealer an have a real scan tool hooked up . To see if all control modules are communicating , a code reader won't do it.

which engine you have. of the 6gas and 1 diesel..

lost spark , did you check for spark on all cylinders.
i the distributor base clamp loose?

if no spark the next step is to :
check fuses. did you check fuses first. when and engine dont run.
my guess is you did service with battery connected.
then do the flash codes, cranking for 5 seconds.

ever do the flash test?
code 12 or 31, , bingo... lost ignition refr, sigs.

the magic jumper rules follow.
flash codes.

1. The diagnostic trouble codes can be read as follows:
   • On models with the 12 cavity ALDL, ground test terminal B. The terminal is most easily grounded by connecting it to terminal A (internal ECM ground). This is the terminal to the right of terminal B on the top row of the ALDL connector.
   • On models with a 3 cavity DLC, connect the two outside terminals (terminals 1 and 2) together.
   • Other models are equipped with white and black diagnostic terminals located under the instrument panel next to the left pick panel. Connect them together.

more of the OBD1 arcane bs is here.,
http://www.troublecodes.net/isuzu/

key fact. let the ECU tell you why spark is dead, FIRST.
after fuses tested
is the cluster CEL lamp glowing key on, (OOPS< if not) ask.

Check the power feed for the pump at the fuel pump relay. Pull the relay out, and with a test light clipped to a ground, probe all the terminals that the relay plugs in to. One terminal should be hot at all times. If no terminal has power, either a fusible link off the battery has failed or a maxi fuse has blown-check a wiring diagram to see how the relay gets power to it.
If the relay has power to it, check the other relay terminals with the engine cranking. When cranking the engine, two terminals should have power-the fuel pump feed, and the signal from computer to activate the relay. If both signals are present, check the pump wire from relay to tank, check the fuel pump ground, and check if the coil side of relay has a good ground-signal from computer goes to coil input side, the coil output terminal should go to ground.
Good luck. Post back with what you find.

Check the injector circuit. There should be a fuse for the injectors. Each injector has a power wire and a ground wire. The power wire should show current when key is on.
Your fuel pressure should show around 50 psi with key on. Is it?
How to check the injector ground circuit: Use a test light. Clip the lead of the test light to the positive battery post, and use the probe into the ground terminal of an injector connector (the connector is unplugged). Now observe the test light while someone cranks the car. If injector ground circuit is working right, the test light will be blinking-meaning the computer is correctly grounding the injector circuit for a split-second each time the light blinks. If no light, check ground wire from injector to computer. If light does not blink but is steady, computer failure.

Here are some possible reasons:

Park/neutral switch is open.
Poor ground connection to starter.

You can test the park/neutral switch by either jumping the solenoid (connect the hot terminal to the start terminal to see if the starter cranks--if it does, the ground is good) or by interrogating the starter relay socket. To interrogate the relay socket, use a 12 volt test light connection the clip to battery positive. Probe the socket terminals with the test light. If only one terminal lights the light, your park/neutral switch is bad or the start wire to the solenoid is bad.

Hi, you will need a voltmeter to diagnose the problem. Set your meter to DC, turn the key on, and check the voltage at the positive coil terminal (black wire with white stripe) with the other probe at engine ground. If no battery voltage, suspect your ignition switch or fuse. If you have battery voltage to the coil, next set your meter to AC and check voltage across the coil primary winding (black wire with white stripe and other black wire) while someone cranks the engine. You should have at least 1 volt AC or more. If no AC voltage, suspect your crank angle sensor inside the distributor. The distributor would have to be replaced, so you would want to be sure it's bad. There are some specific tests you could run, but I would need to know the exact engine you have to provide correct test procedures.




TESTING

E16i, CA16DE and CA18DE Engines
See Figures 1, 2 and 3

Fig. Fig. 1: Crank angle sensor testing terminals-CA16DE engine

Fig. Fig. 2: Crank angle sensor testing-E16i engine

Fig. Fig. 3: Crank angle sensor testing-CA18DE engine

1. Disconnect the CMP electrical connector.
2. Turn the ignition switch to the ON position.
3. Using a voltmeter and check the CMP power source between terminal B and a known good engine ground. The voltmeter should read approximately battery voltage.
   
   If reading is as specified, proceed to the next step. If reading is not as specified, check power supply circuitry.
   

1. Turn the ignition switch to the OFF position.
2. Using an ohmmeter, check the CMP sensor ground circuit, by connecting the meter between a known good engine ground and terminal:
   
   E16i engine- terminal D . CA16DE and CA18DE engines- terminal A .
   

1. Continuity should exist.
   
   If continuity does not exist, repair open in ground circuit. If continuity does exist, proceed to the next step.
   
2. Start the engine.
3. To test the sensor 180° signal, connect a logic probe between the following terminals:
   
   E16i and CA18DE engines-ECU terminal 17 and a known good engine ground. CA18DE engine-ECU terminals 21, 31 and a known good engine ground.
   

1. To test the sensor 1° signal, connect a logic probe between the following terminals:
   
   E16i and CA18DE engines-ECU terminal 8 and a known good engine ground. CA18DE engine-ECU terminals 22, 32 and a known good engine ground.
   

1. The logic probe should indicate that a pulse signal exists in both tests. If a pulse signal was not present, inspect wiring. If wiring is okay, replace the crank angle sensor.

It could also be a bad ground. Sometimes even though the lights come on the ground wire is not grounded good enough. It could also be your starter. Does it make an audible click when you turn the key to start?

No-Start Diagnosis
The diagnostic procedure for EI (electronic ignition) systems varies depending on the vehicle make and model year. Always follow the procedure recommended in the vehicle manufacturer's service manual.
The following procedure is based on Chrysler EI systems. The crankshaft timing sensor and camshaft reference sensor in these systems are modified Hall-effect switches.
If a crank or cam sensor fails, the engine will not start. both of these sensor circuits can be checked with a voltmeter or lab scope.
If the sensors are receiving the correct amount of voltage and have good low-resistance ground circuits, their output should be a pulsing digital signal or voltmeter reading while the engine is cranking.
If any of these conditions do not exist, the circuit needs to be repaired or the sensor needs to be replaced. When the engine fails to start, follow these steps:

1. Check for fault codes 11 and 43.
   • Code 11, "Ignition Reference Signal," could be caused by a defective camshaft reference signal or crankshaft timing sensor signal.
   • Code 43 is caused by low primary current in coil number 1, 2 or 3.
2. With the engine cranking, check the voltage from the orange wire to ground on the crankshaft timing sensor and the camshaft reference sensor. Crankshaft timing and camshaft reference sensor terminals.
   • Over 7V is satisfactory.
   • If the voltage is less than specified, repeat the test with the voltmeter connected from PCM (powertrain control module) terminal 7 to ground.
   • If the voltage is satisfactory at terminal 7 but low at the sensor orange wire, repair the open circuit or high resistance in the orange wire.
   • If the voltage is low at terminal 7, the PCM may need replacement.
     • Be sure 12V are supplied to the PCM terminal 3 with the ignition switch off or on, and 12 V must be supplied to PCM terminal 9 with the ignition switch on.
     • Check PCM ground connections on terminals 11 and 12 before PCM replacement.
3. With the ignition switch on, check the voltage drop across the ground circuit (black/light blue wire) on the crankshaft timing sensor and the camshaft reference sensor.
   • A reading below 0.2V is satisfactory.

NOTE When using a digital voltmeter to check a crankshaft or camshaft sensor signal, crank the engine a very small amount at a time and observe the voltmeter. The voltmeter reading should cycle from almost 0 volts to a highter voltage of about 5 volts. Since digital voltmeters do not react instantly, it is difficult to see the change in voltmeter reading if the engine is cranked continually.

1. If the readings in the previous two steps are satisfactory, connect a lab scope or digital voltmeter from the gray/black wire on the crankshaft timing sensor and the tan/yellow wire on the camshaft reference sensor to ground. Lab scope patterns from the camshaft and crankshaft position sensors.
   • When the engine is cranking, a digital pattern should be displayed or the voltmeter should cycle between 0 and 5 volts.
   • If the voltage does not cycle, sensor replacement is required.
   • Each sensor voltage signal should cycle from low voltage to high voltage as the engine is cranked.

A no-start condition can occur if the PCM "locks up."

• In step 2 above, if 0 volts is indicated the PCM may be faulty or it may be locked up.
• If the PCM is locked up it will not store a fault code for the reason.
• Basically, the PCM will lock up when it goes into a safeguard routine if the 9-volt or 5-volt reference voltage shorts to ground. This shuts down the PCM to protect it. Since it shuts down, no DTCs (Diagnostic trouble code) are stored.
• The engine will not start as long as the ground is present. An intermittent ground will cause the engine to stop running.
• Attempting to restart the engine without cycling the ignition switch to the full LOCK position will not start the engine, even if the ground is lifted.
  • Cycle the ignition switch to the LOCK position and wait about 5 to 10 seconds.
  • If the ground is lifted, the PCM will reset and the engine will start and run until the ground occurs again.
• On 1996 and new SBEC III and JTEC engine controllers, there are two 5-volt reference signals. The sensors that require 5 volts are separated, thus If this signal shorts to ground the engine will still stop running, but for the first time a DTC can be set.
• Also note, if the 9-volt reference voltage is opened, there will be no DTC stored for the crankshaft or camshaft positions sensors. With an open circuit the PCM cannot tell if the engine is cranking or not. The diagnostic routing does not begin until the PCM senses engine cranking.