Question about Cfm 2000 Swamp Air Cooler MMB10 MasterCool Mobile Air Conditioner

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No low speed on my mobile master cooler module no mmb12c

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Could be as simple as the switch, could be as complex as a pole burned out on the motor. If you reverse the connections on the speed selector switch and you end up with low speed and no high speed then you know it's just an inexpensive switch.

Posted on Sep 06, 2010

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Posted on Jan 02, 2017

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2007 Impala 3.9 died while driving,will not spin over,or come out of park.Also gear indicator will not show what gear you are in. No codes.


Will not spin over ? When you turn the key to start ,the starter doesn't engage an spin the engine ? Dash light's come , headlamps come on bright ? Battery good , charged ? No codes ? just engine ,OBD 2 codes ? BCM codes ? How or what did you use to check codes ? code reader , scan tool ? A professional type that can read BCM - body control module codes ? Do you have any idea how complex the electronic's are on this vehicle ? Do you know what happen's when you turn the key to start ?

Power Mode Master
This vehicle body control module (BCM) functions as the power mode master (PMM). The ignition switch is a low current switch with multiple discrete ignition switch signals to the PMM for determination the power mode that will be sent over the serial data circuits to the other modules that need this information, and so the PMM will activate relays and other direct outputs of the PMM as needed. Refer to Power Mode Description and Operation for a complete description of power mode functions.

The body control system consists of the body control module (BCM), communications, and various input and outputs. Some inputs, outputs and messages require other modules to interact with the BCM. The BCM also has discrete input and output terminals to control the vehicle's body functions. Battery positive voltage is provided to the BCM from the BCM fuse in the underhood fuse block. The module has two grounds at G 202 as well as one directly to the vehicle battery. The BCM is wired to the GMLAN High speed serial data buss and the GMLAN Low speed serial data buss and acts as a gateway between them. If the BCM does not communicate the vehicle will not start due to the inability of the engine/powertrain control module (ECM/PCM) and vehicle theft deterrent (VTD) control module to communicate without the BCM providing the gateway function.

Gateway
The body control module (BCM) in this vehicle functions as a gateway or translator. The purpose of the gateway is to translate serial data messages between the GMLAN high speed buss and the GMLAN low speed buss for communication between the various modules. The gateway will interact with each network according to that network's transmission protocol.
One example of this necessary communication is the communication between the engine/powertrain control module (ECM/PCM) which is high speed serial data and vehicle theft deterrent (VTD) control module which is low speed serial data. If these modules can not exchange information, the vehicle will not start.
All communication between the BCM and a scan tool is on the High speed GMLAN serial data circuits. A lost communication DTC typically is set in modules other than the module with a communication failure.
If you don't know of any of this ,your best bet , take it to a qualified repair shop.

Jan 26, 2018 | Cars & Trucks

1 Answer

Where is the Body Control Module located?


I'm just curious if your aware of the BCM function's on your vehicle an if you know what the gate way module is ? An do you know about serial data communication between modules ? An do you know what the power mode master is ? And do you know the BCM needs programming ?
The body control module (BCM) in this vehicle functions as a gateway or translator. The purpose of the gateway is to translate serial data messages between the GMLAN high speed buss and the GMLAN low speed buss for communication between the various modules. The gateway will interact with each network according to that network's transmission protocol.
One example of this necessary communication is the communication between the engine control module (ECM)/powertrain control module (PCM) which is high speed serial data and Theft Deterrent Module which is low speed serial data. If these modules can not exchange information, the vehicle will not start.
Communication between the BCM and a scan tool can be on the high speed GMLAN network or low speed GMLAN network. If one network is lost, the BCM can still communicate with the scan tool. A lost communication DTC typically is set in modules other than the module with a communication failure.

Mar 04, 2016 | 2007 GMC Yukon XL Denali

2 Answers

2002 JEEP DASH LIGHT OF A KEY INSIDE A CIRCLE is on and jeep won't start


It sounds like the vehicle lost its programming or immobiliser settings. When you replace the module, not only does it need to be programmed or "coded" to the vehicle, the security/immobiliser also needs to be "opened". Finally you MUST MUST MUST use the original master key when starting the vehicle after the fix. If you arent using the master key OR if the battery is low, AT ALL, the sync between, vehicle, computer and programming wont take. Any other lights on the dash? any codes? if it is simply the key, try disconnecting the battery (or completely pulling it out to charge it) then putting it all back in and use the master key to start the car. i recommend putting the key to the "on position" for about 15 seconds before starting, crank it up, let it warm up, then drive at a low rate of speed thru all the shift cycles, to relearn PCM to vehicle and vice versa

Feb 16, 2016 | 2002 Jeep Liberty

1 Answer

Where is the body control module on 2006 HHR


Body Control Module (BCM)
Under the I/P below the radio on the right side of the center console.
Do you know what the purpose of the BCM is ?
The body control module (BCM) has a bussed electrical center integrated into the housing. Body control relays and fuses are installed directly on the BCM, which simplifies wiring and junction blocks on the vehicle. The body control system consists of the BCM and its associated controls. Battery positive voltage is provided to the BCM from IBCM BATT 1 fuse and the IBCM BATT 2 fuse in the underhood fuse block. The module grounds are wired to ground G201, G203 and G305. The BCM is wired to the GMLAN High speed serial data buss, and the GMLAN Low speed serial data buss, as well as discrete input and output terminals to control the functions of the vehicle's body.
Serial Data Gateway
The body control module (BCM) in this vehicle functions as a translator between the High and Low speed GMLAN busses. The 2 communication protocols use the BCM to translate communicated serial data messages between the control modules over the 2 serial data busses.
Power Mode Master
This vehicles body control module (BCM) functions as the power mode master (PMM). Refer to Power Mode Description and Operation for a complete description of power mode functions.
Serial Data Power Mode Master
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle, the PMM is the body control module (BCM). The PMM receives 3 discrete ignition switch signals to differentiate which power mode will be sent over the Serial Data circuits. The 3-wire Ignition Switch table below illustrates the state of these inputs in correspondence to the ignition switch position:
Relay Controlled Power Mode
The body control module (BCM) uses the discrete ignition switch inputs Off/Run/Crank, Accessory, and ignition 1, to distinguish the correct power mode. The ignition 1 circuit is also routed to the Run/Crank relay for relay controlled power feeds during the appropriate power mode. The BCM, after determining the desired power mode, will activate the appropriate relays for that power mode.
Reprogram the body control module (BCM) after replacement. Refer to Control Module References .




Do you

Sep 24, 2015 | Cars & Trucks

1 Answer

High speed does not work but low speed does. Is there an easy fix, or will this require a motor replacement to get both speeds working again? The cooler is a Mastercool model MC64C


If your motor only works on low speed and not on high speed first check to see if you have the proper voltage to high speed. Check with a voltmeter or multimeter, check from common on the motor to high speed on the motor at the switch. If you have the proper voltage then you have an open winding on high speed and the motor needs replaced. If you don’t have the proper voltage or any volts, then the switch is bad and needs replaced. This also will be the same if, medium speed won’t work and low speed does.

May 29, 2010 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

Motor does not go from low speed to high speed If the motor is set to low speed it does not turn on until the high speed range is hit then it tries to go from stop to high speed and throws thw belt


MOST OF THE TIME IT IS THE DIGITAL THERMOSTAT OR LOOSE TERMINAL AT THERM. THESE STATS ARE TRICKY TO CHECK. LIKE WHITE ROGERS 4 WIRES CONTROL WITH A RED WIRE TO GREEN YOU GET PUMP WHITE YOU GET LOW YELLOW YOU GET HIGH AND SO FORTH. MASTER COOL DOES IT DIFFERENT SO YOU BUY THEIR TSTAT

Apr 21, 2010 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

2008 Saturn VUE XE 2.4 litre automatic 2.500 miles. Traction control "OFF" illumnated, service engine light on, airbag light on, tranny in limp mode, engine continues to run for 10-15 seconds after...


What Dealership ?????? Saturn dealers are no more . What is it you would like to know ? Complex electronic's involved . Ignition switch is low voltage input to the BCM - body control module. Have seen this problem your having before , BCM problem ! Service engine light on ????? What DTC'S - diagnostic trouble code's are stored , same for air bags an Traction control "OFF" What code's . Any code's stored in any module ? Do a full vehicle scan .

The body control system consists of the body control module (BCM), communications, and various input and outputs. Some inputs, outputs and messages require other modules to interact with the BCM. The BCM also has discrete input and output terminals to control the vehicle body functions. The BCM is wired to the GMLAN High speed serial data buss and the GMLAN Low speed serial data buss and acts as a gateway between them. If the BCM does not communicate the vehicle will not start due to the inability of the engine/powertrain control module (ECM/PCM) and vehicle theft deterrent (VTD) control module to communicate without the BCM providing the gateway function.

Power Mode Master
This vehicles BCM functions as the power mode master (PMM). The ignition switch is a low current switch with multiple discrete ignition switch signals to the PMM for determination the power mode that will be sent over the serial data circuits to the other modules that need this information, and so the PMM will activate relays and other direct outputs of the PMM as needed. Refer to Power Mode Description and Operation for a complete description of power mode functions.

Your best bet , try a different dealer .

Jan 04, 2018 | Saturn Vue Cars & Trucks

2 Answers

Motor sometimes will run and sometimes not


If the motor is still turning, good. It is not burned out. IF the motor is not turning with the unit on, it is either a reset switch (not all units have them) or the motor is burned out. New motors need to have the pulley adjusted so it is not too tight or not too loose.

May 14, 2009 | Mastercool 67471 Evaporative Cooler Air...

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