Question about 2001 Toyota Highlander

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Toyota 2001 highlander bcm malfunction

The body control module is malfunctioning causing the car alarm to go off, the door locks to malfunction and the vac light to be on. How do you change this and what is the part number?

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  • kari duncan
    kari duncan Mar 27, 2014

    Vsc light not vac light. Sorry...

  • John Bodkin
    John Bodkin Mar 28, 2014

    Hello Kari, My name is John. I am a Toyota Master Diagnotic Technician. I have been doing some research on your vehicle and the problems you listed. I can find no connection between the Body ECU and the VSC light being on. The Skid Control ECU controls the VSC. What do you mean when you say the door locks malfunction? Please give as much information as possibe. Has anyone retrieved codes for the VSC? If the light is on then there is a specific diagnostic code stored.


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SOURCE: Heater/AC control no longer allows change in temperature

You have one of two possible problems.

1) The temperature shaft retention nut is loose behind the knob

2.) The wires to the potentiometer part of the temperature may be broken.

Either one is common to this vehicle. The replacement of the AC controller is about 900 dollars. If the wires are broken, they can easily be reattached to the circuit board via soldering. What you would have to do is remove the control box from the dash, and disassemble it. Once the unit is apart, there are 3 wires from the temp knob to the circuit board that need to be re-soldered. The unit CAN be repaired, as opposed to the expense of replacing it.

Posted on Apr 23, 2009

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SOURCE: Malfunction Indicator Lamp

Take your car to your local autoparts store and have them pull the codes - this is free at most stores. Post the codes when you're done. This can be caused by anything - even as simple as not tightening your gas cap (you should hear the clicks - it doesn't damage the cap).

Posted on Aug 07, 2009

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SOURCE: I just had a few warning lights come on in my 08

Hello. Those three lights are all designed to illuminate when you have an issue with the electronic sensors on the engine. To properly identify the reason for the lights being on, you will need to get your vehicle hooked up to a scan-tool. AutoZone provides this service for free. Get the car scanned, and get the codes stored in the memory of the car's computer back to us for further assistance.

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SOURCE: can not lock car by key remote . toyota rav 4 53 plate

If your car has an alarm with a separate remote, it is a separate system and it is probably self-arming. When you lock the doors with the key central lock, the alarm gets armed by the RAV4 being OFF and the door locking action. When you unlock the doors with the key, the alarm is still armed because the key is not comunicating with the alarm just the cars factory keyless system.

Posted on Apr 10, 2010

  • 34 Answers

SOURCE: what causes a toyota highlander VCS warning

When your VSC (Vehicle Stability Control) light comes on, it means your car has been forced to take evasive action to avoid a dangerous situation. For example, if you're driving on an icy or wet, slippery road, and take a turn too sharp or accelerate too quickly, the vehicle will automatically reduce acceleration or apply pressure to the brakes to prevent the car from losing control. In this situation the VSC indicator light will light up to alert you that the action was taken, and remind you to slow down - or to be extra careful. Be safe!

Posted on Dec 10, 2010

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1 Answer

Where is the remote start fuse located?

Do your power door locks work ? There is no fuse for just the remote start !
Remote vehicle start (RVS) begins as an RF message received by the remote control door lock receiver (RCDLR) from a keyless entry transmitter. The RVS request is sent by the RCDLR to the body control module (BCM) via serial data. The BCM monitors system conditions such as content theft deterrent (CTD), hood ajar status, and body DTCs to determine if an RVS even will occur. If conditions are determined to be acceptable, the RVS message is sent to the engine control module (ECM). The ECM monitors system conditions such as engine control parameters and vehicle theft deterrent (VTD) to determine if engine starting will be allowed. If conditions are acceptable, the ECM will initiate engine starting. During the engine run time in a RVS attempt, before the operator enters the vehicle, the ECM may discontinue engine operation if system conditions require it or a message is received from the BCM requesting the engine be turned OFF.
The RVS system will not operate if any of the following conditions are present:
A current vehicle DTC that illuminates the malfunction indicator lamp (MIL)

The vehicle is in valet mode.

More than 2 remote starts have been attempted.

The hazard switch is in the ON position.

A current hazard switch DTC is set.

The vehicle hood is ajar.

A current hood ajar DTC is set.

The CTD system detects an alarm trigger.

Excessive engine RPM

Excessive coolant temperature

Accelerator pedal position greater than 0 percent

Vehicle not in Park

Vehicle theft deterrent malfunction

A current automatic transmission shift lock control system DRC is set.

A vehicle speed sensor signal is detected by the ECM.

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2 Answers

What causes a malfunction in power locks?

The power door locks are controlled by the BCM -body control module ! The door lock switch is an input to the BCM .
The BCM, upon receipt of a door lock switch lock or unlock signal, will switch the appropriate door lock actuator control circuits to battery positive voltage. The opposing side of the door lock actuators are connected to ground internally within the BCM through the other door lock actuator control circuit and the doors will lock or unlock appropriately.
First thing to do would be check power an ground circuits at the BCM ! Do you have any other systems not working -power windows etc...
The DR/LCK fuse supplies battery positive voltage to the I/P fuse block for the door lock system. The body control module (BCM) supplies and monitors a reference voltage to the door lock switch through the door lock switch lock/unlock signal circuit. The door lock switch also receives a constant ground source. If a door lock switch is placed in the lock position or unlock position, the reference voltage is taken directly to ground and the BCM detects the voltage drop on the signal circuit.
Should have BCM checked for stored DTC'S - diagnostic trouble codes !
Ignition ON, observe the scan tool Driver Door Lock Sw, Psgr Door Lock Sw, Driver Door Unlock Sw and Psgr Door Unlock Sw parameters while using the driver and passenger door lock switches. The parameters should change between Active and Inactive.
If the values does not change between the commanded states, refer to Door Lock Switch Malfunction.

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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1 Answer

Remote keyless entry module

First off we need to know if it is a factory or aftermarket alarm. Plus, whether you have a fob or not won't make the alarm malfunction. If I were to venture a guess you have an aftermarket alarm that has gone around the bend. But if it is a factory unit then defective door switches (the ones that turn off the dome lights when the door is closed) could be the problem. Also there could be a problem with the power door locks themselves but not real likely. The body module could have issues in the security section, again not real likely. Usually problems like this are found in bad grounds, switches, intermittent power feeds, or something similar. Even if one of the door jamb switches is just loose and able to shift around could cause weird things to happen. And don't forget the switches under the hood and trunk lid. You can try each door switch by just pushing it in and out and wiggling it around with your finger to see if it has a short or bad ground. If it does the dome light will go on and off as you wiggle the plunger and that may be your problem. Good luck. Intermittent electrical problems are the hardest ones to find.

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