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William D Mulneaux
William D Mulneaux, Auto Service Technician
Category: Dodge
Satisfied Customers: 224
Experience:  20 yrs experience, ASE, Dodge, GM certified.
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I just installed a 6 cd changer to my rb4 radio

Customer Question

I just installed a 6 cd changer to my rb4 radio and get message "general chg error" do you know what the problem is.
Submitted: 6 years ago.
Category: Dodge
Expert:  mndave0002 replied 6 years ago.

Hi, welcome to Just Answer

YOu might be better off posting in electronics catagory...auto mechanics do not fix them often remove and send elsewere. Here is diagnosis

AUDIO

DESCRIPTION

An audio system is standard factory-installed

equipment on this model. Several combinations of

radio receivers and speaker systems are offered. The

audio system uses an ignition switched source of bat-tery

current so that the system will only operate

when the ignition switch is in the RUN or ACCES-SORY

positions.

The audio system includes the following compo-nents:

² Antenna

² Power amplifier (with premium speaker system

only)

² Radio noise suppression components

² Radio receiver

² Remote radio switches (if equipped)

² Speakers

Certain functions and features of the audio system

rely upon resources shared with other electronic

modules in the vehicle over the Programmable Com-munication

Interface (PCI) bus network. The data

bus network allows the sharing of sensor informa-tion.

For diagnosis of these electronic modules or of

the data bus network, the use of a DRB IIIt scan tool

and the proper Diagnostic Procedures manual are

recommended.

Refer to the appropriate wiring information for

complete standard and premium audio system circuit

diagrams. The wiring information includes proper

wire and connector repair procedures, further details

on wire harness routing and retention, as well as

pin-out and location views for the various wire har-ness

connectors, splices, and grounds.

OPERATION

The audio system components are designed to pro-vide

audio entertainment and information through

the reception, tuning and amplification of locally

broadcast radio signals in both the Amplitude Modu-lating

(AM) and Frequency Modulating (FM) com-mercial

frequency ranges.

The audio system components operate on battery

current received through a fuse in the Integrated

Power Module (IPM) on a fused ignition switch out-put

(run-acc) circuit so that the system will only

operate when the ignition switch is in the Run or

Accessory positions.

On vehicles that are equipped with the optional

remote radio switches, the Instrument Cluster

receives hard wired resistor multiplexed inputs from

the remote radio switches. The programming in the

Instrument Cluster allows it to process those inputs

and send the proper messages to the radio receiver

over the Programmable Communication Interface

(PCI) bus network to control the radio volume up or

down, station seek up or down, preset station

advance, and mode advance functions.

Refer to the owner's manual for more information

on the features, use and operation of each of the

available audio systems.

DIAGNOSIS AND TESTING - AUDIO

Any diagnosis of the Audio system should

begin with the use of the DRB IIIt diagnostic

tool. For information on the use of the DRB

IIIt, refer to the appropriate Diagnostic Service

Manual.

Refer to the appropriate wiring information. The

wiring information includes wiring diagrams, proper

wire and connector repair procedures, details of wire

harness routing and retention, connector pin-out

information and location views for the various wire

harness connectors, splices and grounds.

WARNING: DISABLE THE AIRBAG SYSTEM

BEFORE ATTEMPTING ANY STEERING WHEEL,

STEERING COLUMN, SEAT BELT TENSIONER, SIDE

AIRBAG, OR INSTRUMENT PANEL COMPONENT

DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-LATE

THE BATTERY NEGATIVE (GROUND) CABLE,

THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-TEM

CAPACITOR TO DISCHARGE BEFORE PER-FORMING

FURTHER DIAGNOSIS OR SERVICE. THIS

IS THE ONLY SURE WAY TO DISABLE THE AIRBAG

SYSTEM. FAILURE TO TAKE THE PROPER PRE-CAUTIONS

COULD RESULT IN ACCIDENTAL AIR-BAG

DEPLOYMENT AND POSSIBLE PERSONAL

INJURY.

(next is a chart copied here The capitol words are problems followed cause with number and solution with number it would not copy right)

AUDIO SYSTEM DIAGNOSIS TABLE /CONDITION POSSIBLE CAUSES/ CORRECTION (headings)

NO AUDIO 1. Fuse faulty. 1. Check radio fuse and Ignition-Off Draw (IOD)

fuse in the Integrated Power Module (IPM).

Replace fuses, if required.

2. Radio/amplifier (if

equipped) connector faulty.

2. Check for loose or corroded radio/amplifier

connector. Repair, if required.

3. Wiring faulty. 3. Check for shorted or open wires. Repair wiring,

if required.

4. Radio/amplifier (if

equipped) ground faulty.

4. Check for continuity between radio chassis and

a known good ground. There should be

continuity. Repair ground, if required.

5. Radio/amplifier (if

equipped) faulty.

5. Refer to appropriate Diagnostic Service

Manual.

6. Speakers faulty. 6. Replace speaker as necessary.

NO RADIO DISPLAY 1. Fuse faulty. 1. Check radio fuse and Ignition-Off Draw (IOD)

fuse in Integrated Power Module (IPM). Replace

fuses, if required.

2. Radio connector faulty. 2. Check for loose or corroded radio connector.

Repair, if required.

3. Wiring faulty. 3. Check for battery voltage at radio connector.

Repair wiring, if required.

4. Radio ground faulty. 4. Check for continuity between radio chassis and

a known good ground. There should be

continuity. Repair ground, if required.

5. Radio faulty. 5. Refer to appropriate Diagnostic Service

Manual.

(new chart)

CONDITION/ POSSIBLE CAUSES/ CORRECTION

CLOCK WILL NOT KEEP

SET TIME

1. Fuse faulty. 1. Check Ignition-Off Draw (IOD) fuse in the

Integrated Power Module (IPM). Replace fuse, if

required.

2. Radio connector faulty. 2. Check for loose or corroded radio connector.

Repair, if required.

3. Wiring faulty. 3. Check for battery voltage at radio connector.

Repair wiring, if required.

4. Radio ground faulty. 4. Check for continuity between radio chassis and

a known good ground. There should be

continuity. Repair ground, if required.

5. Radio faulty. 5. Refer to appropriate Diagnostic Service

Manual.

POOR RADIO RECEPTION 1. Antenna faulty. 1. (Refer to 8 - ELECTRICAL/AUDIO/ANTENNA

BODY & CABLE - DIAGNOSIS AND TESTING).

2. Radio ground faulty. 2. Check for continuity between radio chassis and

a known good ground. There should be

continuity. Repair ground, if required.

3. Radio noise suppression

faulty.

3. Repair or replace ground strap as necessary.

4. Radio faulty. 4. Refer to appropriate Diagnostic Service

Manual.

NO/POOR TAPE

OPERATION

1. Faulty tape. 1. Insert known good tape and test operation.

2. Foreign objects behind

tape door.

2. Remove foreign objects and test operation.

3. Dirty cassette tape head. 3. Clean head with Mopar Cassette Head

Cleaner.

4. Faulty tape deck. 4. Exchange or replace radio, if required.

NO COMPACT DISC

OPERATION

1. Faulty CD. 1. Insert known good CD and test operation.

2. Foreign material on CD. 2. Clean CD and test operation.

3. Condensation on CD or

optics.

3. Allow temperature of vehicle interior to stabilize

and test operation.

4. Faulty CD player. 4. Refer to appropriate Diagnostic Service

Manual.

AMPLIFIER

DESCRIPTION

The optional Infinity premium speaker system

a separate Infinity audio power amplifier.

The amplifier is a six channel unit and is rated at

total output watts. The amplifier is located

behind the glove box.

OPERATION

The power amplifier electronically increases the

frequency response of the normal audio signal output

from the radio amplifier in order to improve the

acoustic performance of the speakers. On vehicles

equipped with an amplifier, the amplifier section of

the radio becomes a pre-amplifier.

The amplifier receives audio signal inputs for

speaker channels from the radio, then sends ampli-includes

fied audio outputs through six separate channels

with dedicated feed and return circuits to the indi-240

vidual speakers.

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove glove box (Refer to 23 - BODY/IN-

STRUMENT PANEL/GLOVE BOX - REMOVAL).

(3) Remove instrument panel center bezel (Refer to

23 - BODY/INSTRUMENT PANEL/INSTRUMENT

PANEL CENTER BEZEL - REMOVAL).

(4) Remove instrument panel lower right center

bezel (Refer to 23 - BODY/INSTRUMENT PANEL/IP

LOWER RIGHT CENTER BEZEL - REMOVAL).

(5) Disconnect electrical harness connector from

amplifier (Fig. 1).

(6) Remove mounting bolts.

INSTALLATION

(1) Connect electrical harness connector and

install amplifier.

(2) Install mounting bolts. Tighten to 10 N·m (90

in. lbs.).

(3) Install instrument panel lower right center

bezel (Refer to 23 - BODY/INSTRUMENT PANEL/IP

LOWER RIGHT CENTER BEZEL - INSTALLA-TION).

(4) Install instrument panel center bezel (Refer to

23 - BODY/INSTRUMENT PANEL/INSTRUMENT

PANEL CENTER BEZEL - INSTALLATION).

(5) Install glove box (Refer to 23 - BODY/INSTRU-MENT

PANEL/GLOVE BOX - INSTALLATION).

(6) Connect battery negative cable.

right cowl side panel into the interior of the vehicle.

Inside the vehicle, the primary coaxial cable is con-nected

to a secondary instrument panel antenna

coaxial cable with an in-line connector that is located

behind the right kick panel. The secondary coaxial

cable is then routed behind the instrument panel to

the back of the radio.

 


hope this helps__________________
PLEASE CLICK ON "ACCEPT" IF I WAS HELPFUL-OR IF YOU NEED FURTHER ASSISTANCE JUST ASK, THANKS
Customer: replied 6 years ago.
What you have explained is all the stuff I have aready read about over the internet. As far as using a drbIII diagnostic tool, I being a general joe mechanic do not have one due to the cost...$3000+ , so I do not accept your answer.
I guess I will take it to the dodge dealer as planned becuase you do know the obvious answer to my question. Thanks for the info, but will figure this one out myself.
Expert:  mndave0002 replied 6 years ago.
sorry about all this maybe you can rent a scan tool form the parts store but i doubt they rent ones that nice good luck thanks for the patience. Lots of dealers send them out for serious service.
Expert:  William D Mulneaux replied 6 years ago.

Welcome to Just Answer,

Give me a day or 2 and I will come up with something, are you trying to plug the changer directly into the radio, dumb question, where are you accessing the network?

Give me all the part numbers you are using, the cables and changer any multi-plex device. Just to verify you said RB4 single CD Nav radio?

I apologize for your frustration, I will try to get you some valid info. I will be involved in Chrysler factory training all next week so I apologize if you do not hear from me, it can be hard to get on motel computers.

On a good note one of my classes is a higher level body electronics so if I can't get the answer myself I am sure the instructor will give it to me.

Thank you for your patience,

Bill

Customer: replied 6 years ago.
Yes RB4 single CD Nav radio.
6 CD changer part #82203465 cartrage type, not in dash model.
Using all factor type harnesses(plug&play).
No DTC codes in vehicle computer, tried disconnecting radio power for 15 mins then same thing occured again. Most likely a interface problem. Neither radio or changer are the original installed equip that was on this vehicle but both are compatible with this year model truck.
Customer: replied 6 years ago.
"mndave0002" are you being sarcastic or serious, I may not be a design engineer but I am not a dummy ethier. Thanks for your help!
Expert:  mndave0002 replied 6 years ago.
I am sorry I could not help. I seen you were question open for a long time and tried to give you something. radios with two after market hook-up is not my thing and I appolagize for wasting your time. Give William a few days and he will probably get good answer on this.
Expert:  William D Mulneaux replied 6 years ago.

I am back,

Sorry for the wait.

Did you use any kind of multi-plexing box when you installed the CD player?

I think the problem lies in the network communication on your truck. Nowadays even the radio and CD changer our considered modules and they all communicate on a network. Your truck is most likely running a single wire PCI bus for interior communication. It would not surprise me if the changer was running on a CAN B bus.

This is hard for me to say because I can not look at the truck. I do however have a document pertaining to the installation of CD changers, NAV radios and satellite radios.

It says you need a multi-plexing box, this makes sense as this device would translate between the 2 different bus systems.

You may have already installed this device, you may have solved the problem by now, let me know one way or the other.

Thanks,

Bill

Customer: replied 6 years ago.
Hi Bill
No there is no multiplexing box installed and no problem still exists. I have schedualed an appt with the dodge dealer to trouble shoot problem, but your answer seems logical. If your answer is somewhat correct I will release the funds when I find out from the dodge dealer what needs to be done to solve this. thanks Ken
Expert:  William D Mulneaux replied 6 years ago.

Refer the dealer to this info:

case # XXXXX

With factory UConnect there is 3 connectors in the module. There is a 10 way that sits away from the other connector. The 22 way and the other 10 way connector look like one connector but they are separate by a spacer (you need to look very close to see the spacer).

To install SDARS you will need to plug in Y-cable (05086643AA) from the Satellite Receiver to the Corporate Mux Box part number (05059112AC) to the ten way connector that is next to the 22 way connector on the Factory UConnect Module.

To add the CD Changer you will need cable (05080971AA for 10 Disk) or (05073243AA for 6 Disk) and that cable will plug into the Corporate Mux Box.

I would also check that you have the right cable, I spend a lot of time getting the wrong parts, even more likely if you are using parts from a donor truck. I am assuming that the RB4 works fine, what about the Navigation portion?

Please let me know how this turns out one way or the other.

Thanks,

Bill

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