Question about 2001 Toyota Tundra
I blew the 120 amp alternator fuse crossing cables.I bought a reader and it says p1127 etcs actuated power source circuit malfunction.Where should i go from here?Throttle control and radio are not working.Fuses are good,so where are the relays.The radio should have another fuse other than the one in the box.
Doing that (reverse battery,) blows up very extensive electronics.
fuse that look good can be in fact bad.
A pro never guesses, we use a magic $8 tool (walfart) called volt meter to find them.
every time. no guessing. the the mains are huge
too bad you never told what exactly what you did.,
1: removed battery plus cable first (wrong) and wrench hit steel>?
2: installed the battery backwards, boom"
3: removed the alternator , hot or starter (boom)
know what you did ,tells me which fuse blew., for sure.
the voltage will be on both sides of fuse. if fuses is good,some
need key on to be hot.
some cars have fuse links that look like wire are are NOT.
you have no power to the radio ,now, the voltmeter is 0v
so you back up from there
why not start at the travesty area, the battery and check all PDC fuses first for 2 x hot each. need a ASE TRAINING video have it.
fuse that look bad are
fuses that look good,can in FACT be bad, gawd made is a meter
and bingo we are all blessed with truth.
Posted on Dec 26, 2014
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Posted on Jan 02, 2017
There are 3 fuses that control the rear defogger, and 1 relay
The fuses are: 10 amp HEATER, 10 amp MIRROR-HEATER; under the dash
The 30 amp DEF fuse is in the fuse box under the hood
The relay is the DEFOGGER relay, which is on the back side of the fuse panel under the dash
Also, check for a loose wire on the defroster grid (on the back glass), this is the most common problem.
Posted on Oct 20, 2008
you probably didnt change the right fuse and had another one blown at the same time you also could have a primary fuse under the hood that blew. once fixed dont use pump again. not same amps drawn
Posted on May 06, 2009
Under the hood there is some. Not sure about your application, but it might control interior stuff too. It will be a bigger amperage than normally inside the car though
Posted on May 20, 2009
I had a prolem like this one time a while back. what i did was got the wiring diagram and checked everything that was running through that 30 amp fuse. on the one i was working on it ended up being an injector wire pinched under the valve cover and it didnt short out till the car was driven til it warmed up and expanded after the valve cover gasket was changed. hope this helps!
Posted on Jun 27, 2009
Look to see if you have power at pin 1 of the circuit opening relay. The C.O. Relay is what powers the fuel pump. If you have power there (a blue wire), you have an open circuit between the relay and the pump.
Posted on Jul 17, 2009
Tips for a great answer:
The ETCS (Electronic Throttle Control System) has a dedicated power supply circuit. The voltage (+BM)
is monitored and when it is low (less than 4 V), the ECM determines that there is a malfunction in the
ETCS and cuts off the current to the throttle actuator.
When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the
voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to
normal, turn the ignition switch OFF. The ECM then allows the current to flow to the throttle actuator so
that it can be restarted.
The ETCS does not use a throttle cable.
The ECM monitors the battery supply voltage applied to the throttle actuator.
When the power supply voltage (+BM) drops below 4 V for 0.8 seconds or more, the ECM interprets this
as an open in the power supply circuit (+BM). The ECM illuminates the MIL and sets the DTC.
If the malfunction is not repaired successfully, the DTC is set 5 seconds after the engine is next started.
Jun 27, 2016 | Cars & Trucks
Command the driver door and passenger door lock actuators to LOCK and UNLOCK with the scan tool, the doors should LOCK and UNLOCK when changing between commanded states.
If a door lock actuator does not perform the LOCK and UNLOCK functions, refer to Door Lock Malfunction
DTC B3130 00: All Door Unlock Circuit
DTC B3135 00: All Door Lock Circuit
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