Question about 2003 BMW 325

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Light on dash and computer says ignition system fault

I had a flat battery and a friend used a porter start to start it but he had it in 24volt mode and now it wont start it has ignition but wont start it says ignition system fault eney ideas what could be the fault

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You have probably blow one of the fuses in the fuse panel located in the engine compartment near the battery.... bmw's also have a fuse panel in the trunk as well.

Robert

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Posted on Jan 26, 2009

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Lights left on and the battery went flat on my lads peugeot 206 diesel 2002 recharged battery, the car will not start message on dash ECO MODE CAN ANYONE HELP WITH THE PROBLEM PROBLEM ?


Economy mode usually comes on when the computer senses a low charge on the battery and conserves power to start the vehicle.
1. If you can start the car by jump starting from another vehicle with its engine running then you know your battery is the problem. In some cases when you completely drain a battery you have issues with them ever after until they fail completely.

2. If you cannot jump start from another vehicle then turn everything off and disconnect the negative and then the positive lead on the battery terminals and leave it for 10 minutes. Then connect it back up again (positive lead first and then negative lead last) and put the key in the ignition and turn on the ignition but do not start the car. Leave it there for 5 minutes and then turn the ignition it off. Then try starting again.

3. You have not mentioned if there are any other warning lights being displayed on the dash which you have not mentioned in your question. Please check this carefully because it is also relevant to this problem if there are other warning lights displayed.

Jan 09, 2016 | Peugeot 206 Cars & Trucks

1 Answer

24volt system draining fully charged batteries within 30 minutes down to 2 volts each and ignition doesnt turn bus off have to stall it have to remove battery to turn dash lights of has new alternator


to drain the batteries down that quick the battery cables would be very hot to the touch
if they are not then the problem may be an internal fault in the batteries so have them load tested first to eliminate them from the equation
Unless you are running a heavy vehicle then 24 volts will be very unusual as most light vehicles run 12 volts
If that is the case and you have 2 X 12 batteries make sure that they are connect correctly ( in parallel not in series) or they will discharge each other very quickly

Jun 14, 2015 | Cars & Trucks

1 Answer

Truck wont start


replace battery cables could have bad ground cable.if see dash lights on when turn ignition to on position.check starter fuse or relay or remove starter check for faulty starter solenoid or starter.if starter okay and fuse starter relay okay ignition fuse and switch okay see dash lights could have problem in the theft security system need have vechicle code scan see if theft security fault code show up.

Jan 28, 2013 | 1998 Chevrolet Chevrolet silverado

1 Answer

Engine will not turn over


engine will not turn over.first check battery volts, should be 12.6 volts. if not battery is weak or dead make sure battery cables tight and clean them if you see a lot of corrossion use baking soda and water neutralize corrossion remove battery cables clean them with wire brush also clean battery post terminal with wire brush also wear safety glasses protect your eyes now.try charging and jump start vechicle see if battery good or starter at fault bench test starter and starter solenoid if starter dont work problem in the starter.if starter good.you have blown starter fuse bad starter relay if dash lights dont light up when you turn on the ignition switch and battery has 12.6 volts.check ignition fuse if fuse is good dash still dont light up,you could have faulty ignition switch.if all is good you could have bad clutch safety switch for manual transmission or faulty neutral switch for automatic transmission.if you have the late model cars from 1996 to 2012 has the theft security system which will cause car not to start and try turning engine over with a large wrench to make sure engine not locked up.

Jan 06, 2012 | 2005 Chevrolet Colorado

2 Answers

My GMC Yukon will not start. Tested alternator, battery and starter - all are fine


IF DASH LIGHTS LIGHTING UP.PROBLEM GOT TO BE IN STARTER RELAY OR FUSE, THE CAR COULD BE IN THEFT SECURITY MODE.WHICH WILL DISABLE STARTER AND FUEL PUMP.HAVE CAR CODE SCANNED FOR THEFT SECURITY MODE.IF DASH DONT LIGHT UP WHEN YOU TURN IGNITION KEY.YOU COULD HAVE BAD BATTERY CABLES.LOOK FOR BLOWN IGNITION FUSE.IF FUSE OKAY, YOU COULD HAVE FAULTY IGNITION SWITCH.

Jun 23, 2011 | 2003 GMC Yukon

1 Answer

2000 Honda Odyssey. The passenger side headlamp burned out and I replaced it, no issues two days ago. Battery was cranking slowly and terminals were corroded so I cleaned them. Last night in 15 degree...


The driver's Multiplex Control System is a small computer that controls (among many other things) the dash lights brightness, ignition key interlock, shift interlock, and has a tie in to the brake light system and horn relay. It may be that this small computer malfunctioned and started the whole problem chain.

However, I note from the factory shop manual that if polarity is reversed on the shift interlock--it can be damaged. Reverse polarity will ruin the diode inside the shift interlock. This could have happened when you jumped the battery--a brief period of getting the cables and terminals mixed up could have done it.

Checking the shift lock solenoid can be done by removing the steering column upper cover. Disconnect the shift lock solenoid connector (2 terminals). Using long jumper wires, apply battery voltage to terminal 1 (yellow wire side) of the solenoid and ground terminal 2 (green wire side). Check that the shift lever can now be moved out of Park. NOTE: applying voltage in the opposite direction of that above will damage the diode in the solenoid and will probably ruin it. Remove your jumpers and shift back to park and check that the solenoid locks. If the solenoid does not work properly, it will need to be replaced. This involves removing the end of the transmission shift cable and is a complex job. Remember, no power to the solenoid equals a locked solenoid--it takes power to unlock it.

The Multiplex Control Unit has a self diagnostic feature which checks the computer itself and inputs to the computer. The computer check is called mode 1 and the input test is mode 2. The diagnostic trouble codes are outputted to the ignition key light and beeper.

To test, first confirm that all fuses are good, especially fuse 9 (10A) in the driver's under dash fuse box (left kick panel) and fuse 13 (7.5A) in the passenger's under dash fuse box (right kick panel). Then use a jumper wire (a wire with small alligator clips on each end works best) to jump the two leads of the multiplex test connector. (This is a light green 2 terminal connector dangling from the same wire bundle as the brake pedal switch connector.) Buckle the driver's seat belt (avoids nuisance beeps). Now turn the ignition switch to on. After about 5 seconds, the ignition key light should come on and the beeper should beep for 2 seconds then stop for .2 sec. then beep once for .2 seconds. This indicates that the system is in diagnostic mode 1.

If no diagnostic trouble codes (DTC's) are present, the key light and beeper will not blink/beep again. If there are codes: about one second after entering mode 1, the key light and beeper will indicate the DTC and repeat it every 3 seconds. If there are more than one, the system will indicate them in ascending order. The codes will be a light flash and beep so you will have to count the flashes/beeps to keep track. The codes range from 1 to 6. Code 3 (three flashes/beeps) indicates a problem with the multiplex control unit itself. Write back here for other codes or for questions about mode 2.

Jan 23, 2011 | 2000 Honda Odyssey

1 Answer

I had a flat battery, took it of to recharge it, when i put it back on the car would not start. When you turn the ignition, the dash board lights stay on & there is absolutely no sound from the...


cud be a bad connection-are cables tite from batt to starter-r they clean--make sure inline fuse is workin-its next to positive cable--inspect wiring on car for flaws--may need new relay etc--get car scanned

Oct 26, 2010 | Volkswagen Polo Cars & Trucks

1 Answer

The computer codes are 121155. What does this mean?


Code retrieval can be accessed by the ignition key or by a diagnostic readout box(DRB).To obtain the codes using the key method,set the park brake,and put the vehicle in Park/neutral.

Some 95 and later OBDII vehicles, you may be able to retrieve OBDII codes with this procedure, if equipped with digital dash:

* Turn the ignition key ON,OFF,ON,OFF,and finally ON again(ENGINE NOT RUNNING)
* The codes will start to flash on the POWER LOSS or CHECK ENGINE light.
* FLASH,pause,FLASH,FLASH=code 12

The codes showed are...


Fault Code 12
Description: Memory standby power recently lost
Power loss light: Off
Limp-in mode: None

Possible Causes:* Battery or power line recently disconnected - This code is normal if the electrical system has been worked on or the battery has recently been disconnected. It will be removed after 15 ignition switch on/off cycles.
* Low system voltage, bad battery or battery terminals - If the system recently had a power drop (due to a dead battery or bad alternator), this code will appear. If the battery terminals are bad and the engine was jumped, this code will appear.
* Bad connection or wiring - Check the wiring and connections between the battery, power module, and logic module (or SMEC). Check all fusible links and power connectors to the battery. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

Diagnostic Method
Trigger Parameters
- Logic module receives power after previously not having power


Results If Component Fails

Fault code 12 is stored. The logic module is basically telling you that it has lost power and will not remember any previously stored codes or engine sensor table data. The code will be removed after 15 ignition on/off cycles and the logic module will use default values for all look-up tables as a starting point until it "learns" the attributes of the engine.


Fault Code 11
Description: Engine not cranked since last reset or no ignition reference signal detected during cranking
Power loss light: Off
Limp-in mode: None

Possible Causes:
* Engine hasn't been cranked since last reset - Power was removed from the logic module (disconnected or dead battery, etc.) and the logic module has no memory of seeing a signal from the ignition reference sensor. Crank the engine and check for the code again. If the logic module saw a signal, the code will be cleared. This code will not show up if the sensor simply fails. The logic module must be reset and the engine cranked to see if the sensor is working.
* Bad connection or wiring - Check the wiring and connections between the hall effect sensor (located underneath the distributer cap) and the logic module. Check the continuity of the two 3 conductor cables coming out of the sensor--these are prone to fatiguing and breaking inside the insulation where they exit the sensor if the cables are not properly tied down. You may be able to resolder them. Clean and regrease any corroded connectors with dielectric grease and repair any shorts. This code will not show up if the sensor simply fails. The logic module must be reset and the engine cranked to see if the sensor is working (see above).
* Hall effect sensor failure- Check the ignition reference sensor and fuel injector sync sensor cables. They are the two, flat 3 conductor cables coming out of the sensor at the base of the distributer cap. These often fatigue where they exit from the sensor. Upon replacing the sensor, make sure the cables are clipped or tied to the distributor cap shroud (or elsewhere) so they do not swing around. This code will not show up if the sensor simply fails. The logic module must be reset and the engine cranked to see if the sensor is working (see above).

Diagnostic Method
Trigger Parameters
- Computer has been reset
- No signal from the ignition reference sensor has been detected

Results If Component Fails
Fault code 11 is stored and the engine will not start (even if the ignition reference sensor is working). A running engine will stall, but no code will be stored. The logic module must be reset and the engine cranked to see if the sensor is working.


Fault Code 55
Description: End of message
Power loss light: Off
Limp-in mode: None

Possible Causes:
* No further fault codes are stored. If this is the only code received, then there are no codes stored in memory. This code will always be given, even if nothing is wrong. If you do not get this code, then you may not be retreiving the codes properly, or the power loss light may be burnt out. The light should come on for 1 second when the ignition is initally turned on as a bulb test.

Diagnostic Method
Trigger Parameters
- No further codes in memory


Hope helps (remember comment and rated this)

Aug 03, 2010 | 1996 Chrysler Concorde

1 Answer

Flashing airbag light


yes, go here for more help. There is a file on how to download codes and clear system.

The number of flashes is giving you a lamp fault code, LFC. What is it giving you?

http://autos.groups.yahoo.com/group/villagerquest/

Diagnostic Test Modes Without Scan Tool
Two mode options are available under the diagnostic test modes:
  • user mode.
  • diagnosis mode.
The ignition switch is used to alternate from one mode to another.
Diagnosis Mode
The diagnosis mode will display any fault present in the system. The SRS will not enter diagnosis mode if no malfunction is detected.
User Mode to Diagnosis Mode
NOTE: The SRS will not enter diagnosis mode if no fault is detected in user mode.
  1. Ignition switch to ON.
  1. After the air bag warning indicator lights for seven seconds, set ignition switch to OFF within one second.
  1. Wait more than three seconds.
  1. Repeat steps 1 through 3 three times.
  1. Ignition switch to ON.
Diagnosis Mode to User Mode — After Repair
  1. Ignition switch to OFF for at least one second.
  1. Ignition switch to ON.
Diagnosis Mode to User Mode — During Diagnosis
NOTE: If switch from Diagnosis Mode to User Mode is required while diagnosing a fault, carry out the following procedure.
  1. Ignition switch to ON.
  1. After the air bag warning indicator lights for seven seconds, set ignition switch to OFF within one second.
  1. Wait more than three seconds.
  1. Repeat steps 1 through 3 three times.
  1. Ignition switch to ON.
Clearing Lamp Fault Codes
NOTE: Lamp fault codes must be cleared from memory before proving out the system.
NOTE: When a new RCM is installed, the air bag warning indicator will operate in user mode. Switching to diagnosis mode is not required.
To clear lamp fault codes after a repair, carry out the procedure to switch from diagnosis mode to user mode. Once in the user mode, the lamp fault codes will be cleared from memory.
Lamp Fault Codes
If the air bag diagnostic monitor detects a current fault, the fault code will be displayed with a flashing sequence of the air bag indicator. The fault code consists of:
  • A start signal to indicate the beginning of a fault code.
  • A number of flashes indicating the particular code that has been set.
The start signal:
  • begins with two seconds off.
  • two seconds on.
  • off.
  • one second on.
  • two seconds off.
Following the start signal, if any current fault is detected, the fault code will be displayed. The fault code:
  • is a series of half second flashes of the air bag indicator.
  • is followed by the start signal.
The start signal and the code for any current fault will repeat until the ignition is switched off or the air bag diagnostic monitor is switched to the user mode.
Inspection and Verification
  1. Verify the customer concern by checking the air bag indicator in the instrument cluster. Refer to Prove Out in this section.
  1. Visually inspect for obvious signs of mechanical and electrical damage using the following chart.


Visual Inspection Chart Mechanical Electrical
  • Damaged air bag diagnostic monitor bracket
  • Open fuse
  • Damaged wiring harness
  • Loose or corroded connectors
  • Circuitry open or shorted
  • Damaged shorting bars

  1. If the concern is not visually evident, enter the system Diagnosis Mode.
  1. If no DTCs are displayed in the Diagnosis Mode, proceed to the Symptom Chart in this section.
  1. If DTCs are retrieved, proceed to the Air Bag Diagnostic Monitor Fault Code Table in this section.


Air Bag Diagnostic Monitor Fault Code Table Code Component/Fault Description 0 Normal Operation/No Fault Detected 1 Front Passenger Safety Belt Pretensioner 2 Driver Air Bag Module Circuit Is Faulted 3 Front Driver Safety Belt Pretensioner 7 Air Bag Diagnostic Monitor Fault 8 Passenger Air Bag Module Circuit Fault 9 Low Battery Voltage

Mar 24, 2009 | 2001 Mercury Villager

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