I am getting several control circuit malfunction code on my scanner. also a Loss of Class 2 Communication w/VCM/PCM.
What code's ? # code's P0 what ? Any BCM - body control module code's ? Did you do diagnostic test's for said code's ? Do you know what a factroy diagnostic flow chart is ? Is the vehicle a 4X4 or 2X4 ? What engine ? Do you know what class 2 serial data bus is ? Do you have wiring diagrams ?
Headlamp ON/OFF control is determined by the body control module (BCM) by a signal on the headlamp switch headlamp on signal circuit when the headlamp switch is in the HEAD position. When the headlamp switch is in the AUTO position, the BCM determines headlamps ON/OFF by the voltage from the ambient light sensor.
High Beams
The high beam headlamps receive voltage from the headlamp HI relay located in the underhood fuse block. The body control module (BCM) controls the relay on the headlamp high beam relay control circuit. High beam control is determined by a signal on the headlamp dimmer switch signal circuit from the multifunction switch. When the headlamp dimmer switch signal circuit is grounded, the BCM grounds the headlamp high beam relay control circuit, illuminating the high beam headlamps. The right and left high beam circuits are independent and are fused independently in the underhood fuse block. The right and left headlamps are grounded at G100 and G104.
The high beam indicator is illuminated when the instrument cluster receives a class 2 serial data message from the BCM that the high beams are illuminated.
Low Beams
The low beam headlamps receive voltage from the headlamp LOW relay located in the underhood fuse block. The body control module (BCM) controls the relay on the headlamp low beam relay control circuit. Low beam control is determined by a signal on the headlamp dimmer switch signal circuit from the multifunction switch. When the headlamp dimmer switch signal circuit is open, the BCM grounds the headlamp low beam relay control circuit, illuminating the low beam headlamps. The right and left low beam circuits are independent and are fused independently in the underhood fuse block. The right and left headlamps are grounded at G100 and G104.
DTC B2645
The body control module (BCM) monitors the ambient light sensor signal circuit in order to determine if the daytime running lights (DRL) or the auto headlights (ALC) should be turned ON in the AUTO mode. When the BCM senses the ambient light sensor signal voltage is between 1.75-4.9 volts, either the DRL will be commanded ON or the ALC will be commanded ON depending upon the amount of light received by the sensor.
DTC B2645 Ambient Light Sensor Circuit
Testimonial: "Hey Jeff. Pickup is a 4WD, 6.0L. We have removed a huge mouse nest from the fuse box and have replaced the fuse box and checked all the wiring we could possibly check. The following codes are what were given to us on our scanner: P0054, P0060, P0449, P0654, P0758. P02761, U01007, U1041, U1016, U1000, B1440, B2575, B2580, B2585, B2600. Thank you for any other info you can help us out with."
Did you clear the code's too see if all the same code's come back ? You have a few U code's , these are communication network code's . solving these may take care of the rest . There is a lot of information in factory service repair manual for all these code's . More then i can supply here . Your best , get service info from alldata or something like that .http://alldatadiy.com/?affiliate_id=9377...
This would supply all diagnostic's for all the code's . Testing power & ground circuits to all the control modules . Testing network wiring etc...
Circuit Description
Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification (ID) number of the module which sent the message for state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an ID number is learned by a module, it will monitor for that modules node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned ID number for 5 seconds, a DTC U1---. --- is equal to the 3 digit ID number of the module.
The control module ID number list provides a method for determining which module is not communicating. A module with an internal class 2 serial data circuit malfunction or which loses power during the current ignition cycle would have a lost communication DTC set by other modules. Use the control module ID number list in order to determine which module is not communicating and the lost communications with -- - diagnostic table in order to diagnose the malfunction. When no message is detected from a learned ID number for 5 seconds, a DTC U1--- is set.
The Control Module ID Control Module
ID Number
Powertrain/Engine Control Module (PCM/ECM)
016
Regulated Voltage Controller (RVC)
022
Hybrid Control Module (HCM)
023
Transmission Control Module (TCM)
024
Transfer Case Shift Control Module (TCSCM)
026
Electronic Brake Control Module (EBCM)
041
Rear Wheel Steering Control Module (RWSCM)
048
Body Control Module (BCM)
064
Inflatable Restraint Sensing and Diagnostic Module (SDM)
088
Instrument Panel Cluster (IPC)
096
Driver Information Center (DIC)
097
Radio
128
Audio Amplifier (AMP)
129
Remote Playback Device - CD Player (CDX)
130
Digital Radio Receiver (DRR)
137
Communication Interface Module (OnStar®)
151
HVAC Control Module
152
Rear Seat Entertainment (RSE) Assembly
154
Driver Door Module (DDM)
160
Passenger Door Module (PDM)
161
Memory Seat Module (MSM)
166
Rear Seat Audio Controller (RSA)
167
• DTC P0054 HO2S Heater Resistance Bank 1 Sensor 2
• DTC P0060 HO2S Heater Resistance Bank 2 Sensor 2
The heated oxygen sensor (HO2S) must reach operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensor to reach operating temperature. Voltage is provided to the heater by the ignition 1 voltage circuit through a fuse. With the engine running, ground is provided to the heater by the HO2S heater low control circuit, through a low side driver within the powertrain control module (PCM). The PCM commands the heater ON or OFF to maintain a specific HO2S operating temperature range. The PCM determines the temperature by measuring the current flow through the heater. When the heater is in the ON state, the PCM will pulse the heater OFF for a duration of 50 ms, once per second. When the heater is in the OFF state, the PCM will pulse the heater ON for a duration of 50 ms, once per second. The PCM calculates the heater resistance on a cold start. This diagnostic will only run once per ignition cycle. If the PCM detects that the heater calculated resistance is not within an expected range, DTC P0054 sets for HO2S bank 1 sensor 2, or DTC P0060 sets for HO2S bank 2 sensor 2.
DTC P0449 Evaporative Emission (EVAP) vent Solenoid Control Circuit
DTC P0758 2-3 Shift Solenoid Control Circuit
Way too much info. this doesn't include diagnostic step's .
Thank you so much Jeff! This gives us allot to go on. I will get ahold of a repair manuel for it and get more detailed info for diagnostic steps. Thanks again so much for your time!
Your welcome an good luck
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SOURCE: My 2002 Dodge intrepid has it engine light on
The MAP sensor and Knock Sensor are both very easily replaced. A better scanner will tell you which sensor is going bad on your transmission. An Autozone code reader will not tell you which sensor on the trans. is acting up. Most sensors on your trans. are very easity replaced as well. They just screw in and plug it. It's worth paying to get a "real" scan done. The trans. sensors are inexpensive and you can replace any other your listed sensors yourself.
SOURCE: DTC U1016 Loss of Class 2 Communication with VCM
dealer repair as it may be 1 of 3 things to be replaced:
1 -
Body Control Module (BCM)
1 -
Instrument Panel Cluster (IPC)
1 -
Sensor Diagnostic Module (SDM)
If the BCM or SDM has to be replaced the dealer will have to reprogram them to match your vehicles specifications. The instrument panel can be replaced by the vehicle owner with a few turns of a screwdriver and such
SOURCE: Chevy 3500 Express truck. fuel problem?
IF YOU GOT CYLINDER MISFIRE.OR OPEN FUEL INJECTOR.THAT WILL CAUSE THE PCM TO ENRICHEN FUEL MIXTURE.TO ADJUST TO DEAD CYLINDER.WHICH ACT AS A LARGE VACUUM LEAK.THATS WHY YOUR EXHAUST TAIL PIPES HAS A RAW FUEL SMELL AND WHITE SMOKES.
SOURCE: 1996, Jeep Grand Cherokee, 4.0 - Engine stalls at
when it has acted up and stalled,you stated it will not run right for days,what do you mean
SOURCE: Code p0141 02 Sensor Heater Circuit Malfunct Bank #1 Sensor2
after the catalytic converter on the driver side in the exhaust pipe.
Testimonial: "Awesome info. Thanks!"
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Usually answered in minutes!
https://www.youtube.com/watch?v=D4aZS86W...
Do you know how to test electrical circuit's using a voltmeter , test light etc...
https://www.youtube.com/watch?v=IPUcaH-9...
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