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Check and make sure your battery is fully charged. If so, I would check and make sure your are getting the signal to the starter when the key is in the crank position. If you are getting power to the starter solenoid when they key is in the crank position I would have the starter checked and probably replaced. If you do not get power to the solenoid when the key is in the crank position I would look to possibly an ignition switch, wiring and connectors, or fuses or fuseable links.
Nothing works? How about the headlights, do they work? If yes, then start checking all fuses in the Power Distribution Center or Box under the hood. If no, then look for a bad maxi-fuse in the PDC, and check for a bad fusible link between the battery and the PDC. The battery positive cable goes to the starter, but a pigtail lead off the positive would go to the PDC, to distribute power to all the various circuits on the car. When you turn the key to on, does the dash light up? If yes, at least power is getting to, and going through the ignition switch. One could then check for power on the starter solenoid wire when key was held in crank or start position. If nothing when turning key to on-no dash lights, nothing-then check for an ignition fuse in the PDC. If fuse is good check for power being available at the ignition switch connector. If no power there, check wiring between PDC and the ignition switch-if power is up to the switch, but nothing happens with key on, no dash or warning lights, then could have a bad ignition switch. It just sounds like a maxi-fuse has blown, or a bad fusible link. Good luck.
An ignition switch supplies voltage to the ignition control module and/or the ignition coil. Often an ignition sytem thas two wires connected to the run terminal of the ignition switch. On is connected to the module. The other is connected to the primary resistor and coil. The start terminal of the switch is also wired to the module.
You can check for voltage using either a 12-volt test light or a digital multimeter (dmm).
To use a test light:
Turn the ignition key off and disconnect the wire connector at the module.
Disconnect the S terminal of the starter solenoid to prevent the engine from cranking when the ignition is in the run position.
Turn the key to the run position and probe the red wire connection to check for voltage.
Check for voltage at the battery terminal of the ignition coil using the test light.
Next, turn the key to the start position and check for voltage at the white wire connector at the module and the battery terminal of the ignition coil. If voltage is present, the switch and its circuit are okay.
To do the same test using a DMM:
Turn the ignition switch to the off position and back-probe, with the meter's positive lead, the power feed wire at the module.
Connect the meter's negative to a good ground at the distributor base.
Turn the ignition to the run or start position as needed, and measure the voltage.
The reading should be at least 90% of battery voltage.
In older cars, the natural wear and tear on a vehicle can lead to ignition switch failure. If the switch is failing, you will probably not hear any clicks from the main relay, which fires the ignition. Check the behavior of the dashboard lights if your vehicle stalls. Alternatively, when the key is first turned to position two, the oil light, brake light, charge light and other warning lights will not function. You can try a test to check the integrity of the ignition switch by turning the ignition key to the 'start' position. As soon as it tries to start let go of the key. Allow it to snap back to the 'run' position and note warning lights. If they go out as the switch snaps back then the switch is faulty. if faulty it will not let power through to the starter to start car. check all fuses first. but sounds like switch.
System operation System arms 5 seconds after switching ignition OFF. Switch ignition ON. Ensure clock LED illuminates for 3-5 seconds. If LED flashes rapidly at regular intervals for approximately 1 minute, then flashes at irregular intervals: Key code not recognised. Remove key and try again. Programming When System malfunction: LED illuminates for 1 minute, then flashes at irregular intervals. Key(s) added or replaced. NOTE: Replacement keys MUST have blue mark. Keys with red mark are NOT compatible with this system. How NOTE: Programming method using vehicle keys can be deactivated using diagnostic equipment. Obtain 2 programmed keys (A and B). Insert key A into ignition switch. Turn ignition switch to position II. Wait 1 second. Switch ignition OFF. Remove key A. Insert key B into ignition switch within 5 seconds. Turn ignition switch to position II. Wait 1 second. Switch ignition OFF. Remove key B. Within 10 seconds: Insert key to be programmed into ignition switch. Turn ignition switch to position II. Wait 4 seconds. Switch ignition OFF. Wait 5 seconds. Start engine. If engine does not start and clock LED flashes: Switch ignition ON. Wait at least 20 seconds. Switch ignition OFF. Repeat programming procedure. Repeat above procedure to program remaining keys. Keys can also be programmed using diagnostic equipment
Oil Change Reminder Lamp: Service and Repair
Engine Oil Replacement Reminder Light
This light acts as a reminder to replace the engine oil.
This light will come on when the ignition key is turned to "ON" and will go off after about a few seconds.
When you drive for about 7200 km (4500 miles) after the engine oil replacement, this light illuminates for about 3 seconds and then flashes for about
12 seconds with the ignition key turned to the "ON" position. If you continue driving without replacing the engine oil, and if the distance driven
exceeds 8000 km(5000 miles), the light will come on. The light will remain on thereafter.
If the light is flashing, we recommend that you replace the engine oil at an early opportunity depending on the driving and road conditions. If the light
comes on, replace it as soon as possible.
Resetting the system
The system must be reset after the engine oil replacement. Reset the system by the following procedure:
1. Turn the ignition key to the "OFF" position with the odometer reading shown.
2. Turn the ignition key to the "ON" position while holding down the "TRIP METER" reset button.
Hold down the knob for atleast 5 seconds. The odometer indicates "000000" and the light goes off.
If the system fails to reset, the light will continue flashing.
BFC that body function controller. BFC batt fuse controls .the body function controller .its part of the PCM.the BFC controls anti theft system. your interior lights -drl lights- radio -door locks.if your check engine light is on take it to dealership.because your BFC and PCM works together. your car could shut off. that unsafe.when you on a busy highway.you have electrical problem.not a home fix.
h) Engine Oil Replacement Reminder
Light (for vehicles sold in U.S.A.)
This light reminds you when to replace
the engine oil.
This light will come on when the ignition
key is turned to “ON” and will go off after
about a few seconds.
When you drive for about 8000 km (5000
miles) after the engine oil replacement,
this light illuminates for about 3 seconds
and then flashes for about 12 seconds
with the ignition key turned to “ON” position.
If you continue driving without the
engine oil replacement, and if the driving
range exceeds 12000 km (7500 miles), the
light will come on after the ignition key is
turned to “ON” position. The light will remain
If the light is flashing, we recommend that
you replace the engine oil at an early
opportunity depending on the driving and
road condition. If the light comes on, replace
it as soon as possible.
You need to reset the light after the engine
oil replacement. Reset the light by
following the procedure below:
1. Turn the ignition key to the “OFF” position
with the odometer reading shown.
(For details, see “Odometer and two
trip meters” on page 136 in this Section.)
2. Turn the ignition key to the “ON” position
while holding down the trip meter
Hold down the button until the light goes
off. Before the light goes off, it illuminates
for 3 seconds, flashes for 2 seconds and
illuminates for 1 second.
If the system fails to reset, the light will
I copied this from page 143 of the owners manual for the 2004 4Runner