There is no voltage on the output of the inverter on the headlamp assembly. I've tried another inverter but still nothing. It's hard to measure the voltage to the inverter due to the female connector.
Where does the supply voltage come from, so that I can measure it? Maybe a relay, and how do I get to it.
Also what fuse controls this circuit?
Thanks
Headlamp Inverter has no power 2004 Maxima
Re: Headlamp Inverter has no power 2004 Maxima (marti972)
Sorry to sound stupid but what is the headlight inverter? I just looked in the fsm lt.pdf and didnt see that term used.
Re: Headlamp Inverter has no power 2004 Maxima (blueis300)
System Description EKS005BPControl of the headlamp system operation is dependent upon the position of the combination switch (lightingswitch). When the lighting switch is placed in the 2ND position, the BCM (body control module) receives inputsignal requesting the headlamps (and tail lamps) illuminate. This input signal is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The central processingunit of the IPDM E/R controls the headlamp high and headlamp low relay coils. These relays, whenenergized, direct power to the respective headlamps, which then illuminate.If voltage is applied to a high beam solenoid, the bulb shade will move and a high beam and a low beam arechanged.OUTLINEPower is supplied at all times to headlamp high relay, located in the IPDM E/R (intelligent power distribution module engine room), and to headlamp low relay, located in the IPDM E/R (intelligent power distribution module engine room), and to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room), and through 15A fuse [No. 34 located in the IPDM E/R (intelligent power distribution module engine room)] to CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room) through 50A fusible link (letter f , located in the fuse and fusible link box) to BCM (body control module) terminal 55 through 10A fuse [No. 21 located in the IPDM E/R (intelligent power distribution module engine room)] to BCM (body control module) terminal 42 through 10A fuse [No. 19, located in the fuse block (J/B)] to combination meter terminal 24.With the ignition switch in the ON or START position, power is supplied to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room)
HEADLAMP (FOR USA)LT-7CDEFGHIJLMABLT through 10A fuse [No. 1, located in the fuse block (J/B)] to BCM (body control module) terminal 38 through 10A fuse [No. 14, located in the fuse block (J/B)] to combination meter terminal 23.With the ignition switch in the ACC or ON position, power is supplied through 10A fuse [No. 6, located in the fuse block (J/B)] to BCM (body control module) terminal 11Ground is supplied to BCM (body control module) terminals 49 and 52 to combination meter terminals 10, 11 and 12 through grounds M57, M61 and M79 to IPDM E/R (intelligent power distribution module engine room) terminals 38 and 60 through grounds E15 and E24.Low Beam OperationWith the lighting switch in 2ND position, the BCM (body control module) receives input signal requesting theheadlamps to illuminate. This input signal is communicated to the IPDM E/R (intelligent power distributionmodule engine room) across the CAN communication lines. The CPU (central processing unit) in the IPDM E/R controls the headlamp low relay coil, which when energized, directs power to 15A fuse [No. 36, located in the IPDM E/R] through IPDM E/R terminal 20 to headlamp RH terminal 3 to 15A fuse [No. 45, located in the IPDM E/R] through IPDM E/R terminal 30 to headlamp LH terminal 3.Ground is supplied to headlamp RH terminal 4 through grounds E15 and E24 to headlamp LH terminal 4 through grounds E15 and E24.With power and ground supplied, low beam headlamps illuminate.High Beam Operation/Flash-to-Pass OperationWith the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM (body control module)receives input signal requesting the headlamp high beams to illuminate. This input signal is communicated tothe IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. TheCPU (central processing unit) in the IPDM E/R controls the headlamp high relay coil and low relay coil, whichwhen energized, directs power to 15A fuse [No. 36, located in the IPDM E/R] through IPDM E/R terminal 20 to headlamp RH terminal 3, and to 15A fuse [No. 45, located in the IPDM E/R] through IPDM E/R terminal 30 to headlamp LH terminal 3 to 10A fuse [No. 40, located in the IPDM E/R] through IPDM E/R terminal 27 to headlamp RH terminal 7, and to 10A fuse [No. 38, located in the IPDM E/R] through IPDM E/R terminal 28 to headlamp LH terminal 7.Ground is supplied to headlamp RH terminals 4 and 8LT-8HEADLAMP (FOR USA) through grounds E15 and E24 to headlamp LH terminals 4 and 8 through grounds E15 and E24.With power and ground supplied, the high beam headlamps illuminate.If voltage is applied to a high beam solenoid, the bulb shade will move and a high beam and a low beam arechanged.The unified meter and A/C amp that received the high beam request signal by BCM across the CAN communicationmakes a high beam indicator lamp turn on in combination meter.COMBINATION SWITCH READING FUNCTIONRefer to LT-124, "Combination Switch Reading Function" .EXTERIOR LAMP BATTERY SAVER CONTROLWhen the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turnedfrom ON or ACC to OFF, the battery saver control function is activated.Under this condition, the headlamps remain illuminated for 5 minutes, then the headlamps are turned off.Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.AUTO LIGHT OPERATIONRefer to LT-59, "System Description" in “AUTO LIGHT SYSTEM”.VEHICLE SECURITY SYSTEMThe vehicle security system will flash the high beams if the system is triggered. Refer to BL-79, "VEHICLESECURITY (THEFT WARNING) SYSTEM" .XENON HEADLAMP (IF EQUIPPED)Xenon type headlamp is adopted to the low and high beam headlamps. Xenon bulbs do not use a filament.Instead, they produce light when a high voltage current is passed between two tungsten electrodes through amixture of xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electroniccontrol of the power supply gives the headlamps stable quality and tone color.Following are some of the many advantages of the xenon type headlamp. The light produced by the headlamps is a white color comparable to sunlight that is easy on the eyes. Light output is nearly double that of halogen headlamps, affording increased area of illumination. The light features a high relative spectral distribution at wavelengths to which the human eye is most sensitive.This means that even in the rain, more light is reflected back from the road surface toward the vehicle,for added visibility. Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.CAN Communication System Description EKS005BRRefer to LAN-8, "CAN COMMUNICATION" .
HEADLAMP (FOR USA)LT-7CDEFGHIJLMABLT through 10A fuse [No. 1, located in the fuse block (J/B)] to BCM (body control module) terminal 38 through 10A fuse [No. 14, located in the fuse block (J/B)] to combination meter terminal 23.With the ignition switch in the ACC or ON position, power is supplied through 10A fuse [No. 6, located in the fuse block (J/B)] to BCM (body control module) terminal 11Ground is supplied to BCM (body control module) terminals 49 and 52 to combination meter terminals 10, 11 and 12 through grounds M57, M61 and M79 to IPDM E/R (intelligent power distribution module engine room) terminals 38 and 60 through grounds E15 and E24.Low Beam OperationWith the lighting switch in 2ND position, the BCM (body control module) receives input signal requesting theheadlamps to illuminate. This input signal is communicated to the IPDM E/R (intelligent power distributionmodule engine room) across the CAN communication lines. The CPU (central processing unit) in the IPDM E/R controls the headlamp low relay coil, which when energized, directs power to 15A fuse [No. 36, located in the IPDM E/R] through IPDM E/R terminal 20 to headlamp RH terminal 3 to 15A fuse [No. 45, located in the IPDM E/R] through IPDM E/R terminal 30 to headlamp LH terminal 3.Ground is supplied to headlamp RH terminal 4 through grounds E15 and E24 to headlamp LH terminal 4 through grounds E15 and E24.With power and ground supplied, low beam headlamps illuminate.High Beam Operation/Flash-to-Pass OperationWith the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM (body control module)receives input signal requesting the headlamp high beams to illuminate. This input signal is communicated tothe IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. TheCPU (central processing unit) in the IPDM E/R controls the headlamp high relay coil and low relay coil, whichwhen energized, directs power to 15A fuse [No. 36, located in the IPDM E/R] through IPDM E/R terminal 20 to headlamp RH terminal 3, and to 15A fuse [No. 45, located in the IPDM E/R] through IPDM E/R terminal 30 to headlamp LH terminal 3 to 10A fuse [No. 40, located in the IPDM E/R] through IPDM E/R terminal 27 to headlamp RH terminal 7, and to 10A fuse [No. 38, located in the IPDM E/R] through IPDM E/R terminal 28 to headlamp LH terminal 7.Ground is supplied to headlamp RH terminals 4 and 8LT-8HEADLAMP (FOR USA) through grounds E15 and E24 to headlamp LH terminals 4 and 8 through grounds E15 and E24.With power and ground supplied, the high beam headlamps illuminate.If voltage is applied to a high beam solenoid, the bulb shade will move and a high beam and a low beam arechanged.The unified meter and A/C amp that received the high beam request signal by BCM across the CAN communicationmakes a high beam indicator lamp turn on in combination meter.COMBINATION SWITCH READING FUNCTIONRefer to LT-124, "Combination Switch Reading Function" .EXTERIOR LAMP BATTERY SAVER CONTROLWhen the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turnedfrom ON or ACC to OFF, the battery saver control function is activated.Under this condition, the headlamps remain illuminated for 5 minutes, then the headlamps are turned off.Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.AUTO LIGHT OPERATIONRefer to LT-59, "System Description" in “AUTO LIGHT SYSTEM”.VEHICLE SECURITY SYSTEMThe vehicle security system will flash the high beams if the system is triggered. Refer to BL-79, "VEHICLESECURITY (THEFT WARNING) SYSTEM" .XENON HEADLAMP (IF EQUIPPED)Xenon type headlamp is adopted to the low and high beam headlamps. Xenon bulbs do not use a filament.Instead, they produce light when a high voltage current is passed between two tungsten electrodes through amixture of xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electroniccontrol of the power supply gives the headlamps stable quality and tone color.Following are some of the many advantages of the xenon type headlamp. The light produced by the headlamps is a white color comparable to sunlight that is easy on the eyes. Light output is nearly double that of halogen headlamps, affording increased area of illumination. The light features a high relative spectral distribution at wavelengths to which the human eye is most sensitive.This means that even in the rain, more light is reflected back from the road surface toward the vehicle,for added visibility. Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.CAN Communication System Description EKS005BRRefer to LAN-8, "CAN COMMUNICATION" .
Re: Headlamp Inverter has no power 2004 Maxima (blueis300)
Okay, great info.
The question now is where is the "IPDM E/R (intelligent power distribution module engine room)", other than just in the engine room. I'm trying to find it because it contains the 15A fuse for the left headlamp, the one in question.
Thanks
The question now is where is the "IPDM E/R (intelligent power distribution module engine room)", other than just in the engine room. I'm trying to find it because it contains the 15A fuse for the left headlamp, the one in question.
Thanks
Re: Headlamp Inverter has no power 2004 Maxima (blueis300)
Yes there is a headlamp inverter! An inverter changes DC (direct current) to AC (alternating current). On my 04 Maxima's headlamp assembly, there is a small metal box on the bottom. As I remember 12V DC goes in and about 80V AC comes out which goes to the Xenon bulb.
The stupid part is that it is on the bottom and provides access to change the desiccant. Yes there is a large desiccant pack inside the headlamp assembly. It sits right on top of the inverter with it electrical connection. The desiccant drips water onto the electrical connection and zap goes the fuse. There are left and right fuses as shown in the answer to my post. This connection should never get wet since you shouldn't have water in the assembly, but get a crack in the lens and zap goes the fuse.
The stupid part is that it is on the bottom and provides access to change the desiccant. Yes there is a large desiccant pack inside the headlamp assembly. It sits right on top of the inverter with it electrical connection. The desiccant drips water onto the electrical connection and zap goes the fuse. There are left and right fuses as shown in the answer to my post. This connection should never get wet since you shouldn't have water in the assembly, but get a crack in the lens and zap goes the fuse.
Re: Headlamp Inverter has no power 2004 Maxima (marti972)
Okay, Houston I HAVE HEADLIGHTS
The IPDM E/R (intelligent power distribution module engine room), is right next to the windshield washer refill, right front if in the drivers seat. You take the black plastic cover off, it slide up if you push in the right spots. Inside is the second fuse box (the engine compartment one).
It was a 15A fuse as commented by the reply to my post above. Swapped fuses and all is working.
On the inverter question, it 12V DC in and 85V AC out. Watch out though because it says the open circuit voltage is 380V DC, that would light up you life.
I can see the next question coming, the "open circuit voltage" is what comes out if you don't have a load (bulb), thus open circuit.
The IPDM E/R (intelligent power distribution module engine room), is right next to the windshield washer refill, right front if in the drivers seat. You take the black plastic cover off, it slide up if you push in the right spots. Inside is the second fuse box (the engine compartment one).
It was a 15A fuse as commented by the reply to my post above. Swapped fuses and all is working.
On the inverter question, it 12V DC in and 85V AC out. Watch out though because it says the open circuit voltage is 380V DC, that would light up you life.
I can see the next question coming, the "open circuit voltage" is what comes out if you don't have a load (bulb), thus open circuit.
Re: Headlamp Inverter has no power 2004 Maxima (marti972)
Glad you got it worked out. There was a diagram I couldve posted but you got it. later