Question about 2004 Pontiac Montana

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I have a 2004 montana that would not crank

I replaced Starter, theft module in ignition, and at one time the PCM fuse in the inside fuse box would continuosly blow. I went thru the key on engine off reprogramming 3 times and now it will crank but the fuel pump will not turn on. any suggestions. I have replaced the relay with 3 different one. I check continuity from PCM to Relay and it is there.

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  • krehm Jan 02, 2009

    1999 Montana with the same problem.
    I've replaced both crankshaft position sensors.
    I have continuity between pcm and fuel pump relay.
    Fuel pump turns on with jumper wire at the relay.
    Have you fixed your vehicle? What was the problem?

  • Anonymous Mar 23, 2014

    also replaced the crank case sensor and still the fuel pump does not come on when i turn the ignition on


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I cannot find the inside fuse box to fix a blown fuse for my power outlet up front

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Buick century 3.1 2000 security light staying on car wont crank what can that be

It's the anti-theft system . (SECURITY ) Keeps vehicle from being stolen !
Important: If the wrong ignition key is used in an attempt to start the vehicle, a Data Trouble Code (DTC) will be set and the Body Control Module (BCM) will not send a fuel enable or starter enable message to the Powertrain Control Module (PCM) for three minutes even if the correct ignition is used.
The Pass-Key II?® Theft Deterrent system prevents vehicle theft by disabling the starter motor and fuel system. If the Body Control Module (BCM) dose not identify the use of the correct ignition key to start the vehicle, the (BCM) will communicate a message to the Powertrain Control Module (PCM) which will disable the crank relay and fuel delivery to the engine.
When the (BCM) identifies the use of the correct ignition key (resistor pellet) to start the vehicle, the (BCM) will send a fuel enable and starter enable message to the (PCM) which will allow the vehicle to start.
Your best bet would be have it towed to a qualified repair shop !

Aug 29, 2016 | 2001 Buick Century

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2000 cadillac deville neutral saftey switch location and how to replace

Hi Andre , I'm guessing your Caddy won't start because of your wanting to replace the neutral safety switch .Before replacing or trying to,did check for B+ voltage coming through the switch to the PCM ? There are a lot thing's that could cause your caddy not to start !
Moving the ignition switch to the CRANK position sends a 12 V signal to the PCM ignition crank request input. The PCM verifies that it has received a valid theft password from the vehicle's theft deterrent module and that the transmission is in the PARK or NEUTRAL position. The PCM then grounds the control circuit of the START 1 relay. When the START 1 relay is energized it completes the B+ voltage circuit to the starter solenoid S terminal.
There could be a anti-theft system problem , is the security light lit on the instrument cluster ? Check the start 1 relay in the under hood fuse box . Did you test for Power an control at the relay ? Find the relay an pull it out of the fuse box , look on the bottom of it . You should see four set's of numbers 30,87 an 85,86 , 87 should B+ voltage ,30 goes to the starter solenoid .If you jumped those two the engine should crank over . If the starter is good an battery cables are good etc... I'm talking about jumping where the relay plugs into , not on the relay . Pin 86 should have B+ voltage with the key on , pin 85 goes to the PCM . PCM gives a ground to pin 85 energizing the relay sending B+ voltage to the starter .
Do you know where the PCM is located ?
Transaxle Range Switch Parity Input
connector 1 blue pin 41 ,white wire

Yes you need to test first because what you call neutral safety switch is really called
Transmission Internal Mode Switch
The transmission internal mode switch (IMS) is a sliding contact switch attached to the lower control valve body, within the transmission. The manual valve link assembly then connects the IMS to the manual valve. The four inputs to the PCM from the IMS indicate which position is selected by the transmission selector lever. This information is used for engine controls as well as determining the transmission shift patterns. The input voltage level at the PCM is high (ignition voltage) when the IMS is open and low when the switch is closed to ground. The state of each input is available for display on the scan tool. The four input parameters represented are Mode A , Mode B, Mode C and Mode P (Parity).
If the PCM detects an IMS transitional state between NEUTRAL and D4 while the vehicle is in motion, then DTC P1823 sets. DTC P1823 is a type B DTC.

Jul 31, 2016 | Cadillac DeVille Cars & Trucks

1 Answer

What is the exact location of the antitheft fuse box?

Explain anti-theft fuse box ! what do you think this is ? There is an anti-theft system on your vehicle , called PATS - passive anti theft system .Sorry , but there is not anti-theft fuse box .
Anti-Theft -Passive Anti-Theft System (PATS) The passive anti-theft system (PATS) contains the following components:
  • theft indicator
  • encoded ignition key
  • PATS transceiver module
  • powertrain control module (PCM)
  • standard corporate protocol (SCP) communication network

Mar 20, 2016 | 2004 Ford Ranger

1 Answer

My 99 olds intrigue just won't turn over like my battery or something dead

How is the battery ? Do the headlamps shine bright ? Did you check the crank relay an the crank fuse 40amp ? one of the big one's ,maxi fuse . Under hood fuse / relay box . Check to see if voltage is coming through the transaxle range switch.

When the ignition switch is on, battery voltage is applied to one side of the crank relay in the underhood accessory wiring junction block through circuit 3, the PCM-BCM Fuse in the fuse block, and circuit 439. When the ignition switch is turned to START, voltage is fed to the powertrain control module connector C2 terminal 23 through circuit 5, the CRANK SIGNAL Fuse in the fuse block, and circuit 806 through the underhood accessory wiring junction block. Power is always provided from the CRANK MaxiFuse in the underhood accessory wiring junction block to the common side of the crank relay contacts. When the powertrain control module sees the crank signal and determines that conditions are OK for a crank, it supplies ground through circuit 625 to the crank relay. The crank relay now has both power and ground to the relay coil, causing the relay to pull in. When this happens, and the gear selector is in either PARK or NEUTRAL, the power at the relay common contact is passed through circuit 1737, the transaxle range switch and circuit 6 to the S terminal on the starter solenoid.
Passlock Theft Deterrent System
This vehicle is equipped with the Passlock theft deterrent system. This system contains a Passlock sensor. The Passlock sensor is part of the ignition lock cylinder assembly. The Body Control Module (BCM) interfaces with the Passlock sensor.
When turning the ignition switch to the START position with the proper key, the Passlock sensor generates an analog voltage signal, which is sent to the BCM. This analog voltage signal is of a specific value to the vehicle, and varies from vehicle to vehicle. When attempting to start the engine, the BCM compares a preset stored analog voltage value with the signal coming from the sensor. Because both values match, the BCM sends a fuel enable password via the Class II Serial Data Line to the Powertrain Control Module (PCM). As a result, the PCM enables the crank relay, and allows fuel delivery to the engine.
When attempting to start the engine by means other than using the proper key in the ignition switch, the Passlock sensor sends a analog voltage signal of a different value. The BCM compares the preset stored analog voltage value with the signal coming from the sensor. Because both values do not match, the BCM sends a fuel disable password via the Class II Serial Data Line to the Powertrain Control Module (PCM). As a result, the PCM disables the crank relay, and does not allow fuel delivery to the engine.
For more information regarding the Passlock theft deterrent system, refer to Theft Deterrent in Body and Accessories
This starting system is computer controlled , if you are not familiar with this I suggest you take a GM dealership or an ASE certified repair shop .

Nov 28, 2015 | Cars & Trucks

1 Answer

Put a new coil pack on crancked it over wouldnt start now it wont crank at all batt. is good and so is starter and fuses

Do you have a flashing red light in the center of the top of the dash when trying to crank it ? Check starter relay in the in under hood fuse / relay box ! The PCM - powertrain control module controls it by supplying a ground to the control side ! Where the relay plugs into the fuse box are four sockets , two should have battery voltage , one should show continuity with ohm meter an one should show open or OL on ohm meter this is from the PCM . when you crank the vehicle over, if no problems with anti-theft system the PCM supply's a ground an the engine cranks over !

Apr 14, 2015 | 2003 Ford Windstar

1 Answer

I've changed all the fuses, relays,and the starter on my 2002 Deville dhs and it still won't start.

It won't crank over ? Is there a SECURITY light lit on the instrument cluster .
In the under hood fuse / relay box is the start 1 relay , this relay is energized by the PCM - powertrain control module ! This is the relay that controls the starter ! If there is a anti-theft system problem the PCM will not energize the start 1 relay completing the circuit turning on the starter ! . If you knew how you could test right from the start 1 relay socket in the fuse box , rather that just replacing parts ! You can test with a DVOM -digital volt ohm meter or a test light ! Two of the four sockets have battery voltage , one should show ground an the last will show open , this is the control circuit from the PCM .

Chevy Trailblazer no crank testing and information

Apr 14, 2015 | 2002 Cadillac Deville

1 Answer

My 2009 dts Cadillac started yesterday but this morning went out to start it it wouldn't start lights on in and out just won't turn over

Is there a security light lit on the instrument cluster ? could be a anti-theft system problem ! Three electronic control modules involved in the starting circuit of this vehicle , BCM - body control module , PCM -powertrain control module , an theft deterrent module !
The immobilizer system functions are provided by the theft deterrent module (TDM) and the engine control module (ECM). When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coil surrounding the ignition lock cylinder. This exciter coil is part of the TDM. The energized transponder transmits a signal that contains its unique value, which is received by the TDM. The TDM then compares this value to a value stored in memory. If the values match, the TDM will send the prerelease password via the serial data circuit to the ECM. If the transponders unique value is incorrect, the TDM will send the fuel disable password to the ECM.
When the ignition switch is placed in the Start position a discrete signal is supplied to the body control module (BCM) notifying it that the ignition is in the Start position. The BCM then sends a message to the engine control module (ECM) notifying it that CRANK has been requested. The ECM verifies that the transmission is in Park or Neutral. If it is, the ECM then supplies 12 volts to the control circuit of the starter relay. When this occurs battery positive voltage is supplied through the switch side of the starter relay to the starter solenoid.
If you knew how , in the under hood fuse / relay box is the starter relay , it has a four pin socket when relay is removed ! Two should have battery voltage , one should show ground an one is control voltage from the PCM on pin 86 , pin 85 goes to ground. Pin . Pin 87 should have battery voltage an pin 30 supply's voltage to Fuse #24 marked STRTR in the under hood fuse / relay box ! Yea , if you look on the bottom or side of the relay the pins are marked ! Check for what is missing power or control an go from there .

Mar 25, 2015 | 2009 Cadillac DTS

1 Answer

I need to get passed the anti theft reset to get my 2000 cad.devlle.going, just bought it, I need help to locate fuse boxes, would like to trade somebody for a sharp running truck or car straight across,...

One is under the hood in the engine compartment an Rear Fuse Block
Left rear of the passenger compartment, under the rear seat ! There are a couple of fuse's , but they power up the ignition an the PCM ,so you can't pull those ! Beside that if the PCM does not get a fuel enable signal from the anti-theft module the vehicle won't start . You can't just disable thing's on this vehicle ! If you have security light on steady or flashing you need to take it to someone who has a diagnostic scan tool that can check DTC'S - diagnostic trouble codes ! A code reader can not access these type codes !
Vehicle Theft Deterrent (VTD)Circuit Description
(VTD) Theft Deterrent System Components
Ignition Key (Transponder) The ignition key for the (VTD) theft deterrent system is a typical ignition key with a transponder pellet located in the plastic end of the key. The ignition key transponder value is used to determine if a valid ignition key is being used to start the vehicle, there are approximately three trillion different transponder values available. This vehicle has two types of ignition keys.
Master key (black plastic end) which can start the vehicle and lock/unlock all door locks, all storage compartments and the rear compartment lid lock.

Valet key (gray plastic end) which can start the vehicle and unlock/lock all doors, but can not unlock/lock the storage compartments, or rear compartment lid lock.

Important: The transponder values are not readable and can not be serviced separately.
Theft Deterrent Module The theft deterrent module contains the software for controlling the VTD System. The theft deterrent module uses the following inputs and outputs to control the VTD system.
Inputs ?€¢
Battery voltage from the underhood fuse block PCM/BATT fuse, circuit 240 (ORN).

Ignition start voltage from the ignition switch, circuit 1390 (WHT).

Ground, circuit 450 (BLK).
Outputs Password exchange with the PCM (fuel enable), class 2 message circuit 1807 (PPL).
Powertrain Control Module (PCM) The PCM verifies that the passwords received from the theft deterrent module via the class 2 serial data line are valid. If a password is invalid the PCM disables the fuel delivery system. If the password is valid the PCM enables the fuel delivery system.
Starter Relay The starter relay is controlled by the PCM module via class 2 serial data (CKT 1807 PPL). If the theft deterrent module measures the correct transponder value, the PCM module switches the starter enable control (CKT 447 YEL) to ground. The relay is energized if the ignition switch is in the START position and the gear selector is in the PARK or NEUTRAL positions.

Mar 24, 2015 | Cars & Trucks

2 Answers

Car doesn't crank is it battery, fuses or security tried to crank car din't hear starter but a lot of noises like clicling and sounds from fuil pump i think

Put the key on ACC. Does anti theft light up and stop? If it keep flashing while your cranking then it is the ANTI -THEFT. (by the way the humming noise ifs the fuel pump). If the anti theft doesnt light up during the cranking youll need the ignition module why I say that if it was crank position sensor the fuel pump wouldnt activate. your safe with the ignition module.and if you want it doesnt hurt to replace crank sensor why I say this the year.Its been a while just a suggestion

Apr 23, 2011 | 2004 Buick LeSabre

2 Answers

I have a 2004 dodge stratus that has power to lights but does not turn over when i try to crank even after jumping it off.


Check ignition switch fuse. This is a 20 Amps. see that it has not blown. In 2004 Fuse should be nr 8 in the power box under the hood (newer models #24).

Once you are sure that battery, fuse and wires are OK, check starter and ignition switch. Check if there is 12V to starter while cranking. If there is power and the starter motor does not turn, then the motor is gone.
If there is no power to starter motor when you crank, then the ignition switch located inside the steering column may need replacement. Before repairing, try reading error codes with a code scanner.

Apr 15, 2011 | 2004 Dodge Stratus

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