What is the memory diagnostics tool - Cars & Trucks

A dodge RAM truck, that?
RHR means what?
all radios (most) have wire called, 12vdc memory wire,.
if that wire is cut broken shorted or fuse to it blown memory will be dead. it is that simple.
or installed wrong, did someone do that?, or is radio stock like it was 2011.? then is fuse blown.
RHR I think is Dodge real radio name best I can tell (vast radios exist)
Dodge (FCA) calls those fuses, IOD.
there is one for the radio too, day 1 new out the door
and the factory pulls them all , just before the cars ship to the dealer.
so the battery is not a wreak on deliver.
Iignition OFF , drains, is the name or as we ETs call it memory power. and is.
this wire on radios since 1970, first transistor car radios with station memory, so 50 years now same story ..
main power and ground, IN.
memory power In.
antenna power.>>>out.
speaker.>> out.

a scan toll will also show DTC error for and IOD fuse blown
amazing no?
or lost communications DTC errors making radio fail.(in odd ways)
newer cars the RADIO is married to the BCM
and if IOD blown or comms fail
radio can not save memory.

here is the SM quote on this car dodge RAM 2011
U0184-LOST COMMUNICATION WITH RADIO
For a complete wiring diagram, refer to the Wiring Information. When Monitored: Continuously when the ignition is on. Battery voltage between 10 and 16 volts. Ignition Off Draw (IOD) fused installed. Totally Integrated Power Module (TIPM) is configured correctly. Set Condition: Bus messages not received from the Radio for approximately two to five seconds. Diagnostic Test VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read the active DTCs. Is this DTC active? Yes (Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)/Diagnosis and Testing)(Refer To List 1) and perform the U0184-87-Lost Communication with Radio - Missing Message diagnostic procedure. No (Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing)(Refer To List 2) and perform the Stored Lost Communication DTCs diagnostic procedure. List 1 28 - DTC-Based Diagnostics / MODULE, Totally Integrated Power (TIPM), DS/DJ/D2 - Pickup / Diagnosis and Testing 28 - DTC-Based Diagnostics / MODULE, Totally Integrated Power (TIPM), DD/DP - Chassis Cab / Diagnosis and Testing List 2 29 - Non-DTC Diagnostics / Communication, DS/DJ/D2 - Pickup / Diagnosis and Testing 29 - Non-DTC Diagnostics / Communication,...

as you and see , you can not fix modern cars lacking a scan too.
can not. (even 10 computer in the car) see this???????????

You would need to take it to the dealer or someother qualified repair shop that has the diagnostic tool to check for DTC'S - diagnostic trouble codes in the instrument cluster .
DTC B0570 Season Odometer Malfunction

The instrument cluster receives a vehicle speed input from the vehicle speed sensor (VSS) over the Class 2 line. This signal is used in order to drive the speedometer and the odometer of the instrument cluster. The instrument cluster will compare the VSS data with a 16-point look-up table in order to determine needle deflection. A smooth filter is used in order to secure a continuous response. The season odometer displays the total accumulated kilometers (miles) of the vehicle. This value is permanently stored in the Electronically Erasable Programmable Read Only Memory (EEPROM) of the instrument cluster. The trip odometer displays the accumulated kilometers (miles) to the tenths of a kilometer (mile) since the last reset. This value is stored in Keep Alive Memory (KAM) of the instrument cluster.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
Always perform the Instrument Cluster Diagnostic System Check before attempting to diagnose this DTC.
This diagnostic procedure requires using a scan tool.
This repair procedure requires instrument cluster replacement.
Step
Action
Value(s)
Yes
No
1
Did you perform the Instrument Cluster Diagnostic System Check?
--
YES - Go to Step 2
NO - Go to Diagnostic System Check - Instrument Cluster
2
Using a scan tool, clear the instrument cluster DTC and retest for DTC B0570.
Does DTC B0570 reset?
--
Go to Step 3
Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.1L or Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.8L
3
Replace the instrument cluster. Refer to Instrument Cluster Replacement .
Is the repair complete?
--
System OK
Go to Diagnostic System Check - Instrument Cluster
© 2017 General Motors Corporation. All rights reserved.

are you clearing the codes between diagnostic scans
codes may be ghosting inside the ECU memory
also depends on the quality of the scan tool

unplug the diagnostic tool
disconnect the battery terminals for say 5 minutes
reconnect
start and idle for 5

check for codes

There is not a single fuse for the fuel gauge , there are a few that power up the whole instrument cluster ! If there were a fuse out more then just your fuel gauge wouldn't work .You probably have a bad sending unit in the fuel tank or the stepper motor for that gauge is bad ! The thing to do would be to take to the dealer or some other capable ASE certified repair shop that has a up scale scan tool that can check codes in the instrument cluster ! Or you can take a chance an replace the instrument cluster !
Fuel Gage Inaccurate or Inoperative
Inspect for any stored instrument cluster Diagnostic Trouble Codes (DTCs). Are any DTCs stored in memory?
--
Go to Diagnostic Trouble Code (DTC) List/Type
Go to Step 3

3

1. Install a Scan Tool scan tool.
2. Turn the ignition switch to the RUN position.
3. Establish communication with the instrument cluster.
4. Select special functions under the main menu.
5. Select output control under special functions.
6. Select fuel gauge sweep test under output control main menu.

Does the fuel gauge perform a full sweep when commanded?
--
Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.1L
or
Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.8L
Go to Step 4

Gas or diesel ?
U0155 - Lost Communication With Instrument Panel Cluster Control Module Description: Missing message concerns are logged by a module upon failure to receive a message from another module within a defined retry period. Possible Causes:

• Open VPWR circuit to the sending module
• Open GND circuit to the sending module
• Open network circuits to the sending module

Diagnostic Aids: Carry out the diagnostics for the associated network module. Application Key On Engine Off Key On Engine Running Continuous Memory All Refer to the Workshop Manual Section 413-01, Instrument Cluster. Do you have a scan tool that can talk to the I/P cluster ?

• The instrument cluster does not respond to the diagnostic tool

• Circuit or connection in the controller area network (CAN)
• Instrument cluster

• Go To Pinpoint Test H .

http://www.xcardiag.com/wholesale/jbt-cs538d-auto-scanner-professional-auto-diagnostic-tool-57.htmlJBT-CS538D Auto Diagnostic Tool Scanner user manual videohttp://www.youtube.com/watch?v=YorQZKCcw5k&context=C4b55592ADvjVQa1PpcFP-YPDOHB85F79oSKoGPMS5bTU328jJcq8=

Hello there:
DIAGNOSTICS
When the ignition is turned on, the ABS controller receives a "wake-up" call and illuminates the warning lamps for a few seconds to check the bulbs. It also checks continuity with all four wheel-speed sensors, and checks its own internal software. If any problems are detected, a fault code is stored in memory and the ABS system is disabled.
If a hard fault is detected while the vehicle is being driven, a fault code will be stored in memory, the ABS warning lamp will come on and the ABS system will be disabled.
To diagnose the system, a scan tool is required (DRB III or equivalent). Fault codes are displayed as messages on the tool. Each message will indicate a particular circuit or component. You must then refer to the appropriate diagnostic chart in a service manual to isolate the faulty component in the circuit or confirm the fault.

the best thing to do at this point is to have the diagnostic trouble codes read that may be stored in the memory of the on board computer, it is called the OBD 2 (on board diagnostics generation two) electronic engine control system.

The exterior mirrors:

• are controlled by power controls on the LH front door trim panel.
• are of a foldaway design.
• may contain turn signal indicators.
• may be heated when the heated back window glass is activated.
• may have a programmable recall memory option.

Driver Seat Module
The power driver seat and power exterior mirrors are controlled by the driver seat module (DSM) only when the vehicle is equipped with the programmable/recall memory option.
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Power Exterior Mirror Operation
The power exterior mirrors are controlled by the DSM and are operational all the time, whether the ignition switch is on or off. Using the power exterior mirror switch, the driver can adjust the driver and passenger exterior mirrors four ways.
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Visual Inspection Chart Mechanical Electrical

• Exterior mirror(s)
• Interior mirror

• Central junction box (CJB) fuse
• Circuitry
• Exterior mirror control switch
• Exterior mirror motor
• Interior mirror
• Driver seat module (DSM)
• Memory set switch

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1. If the vehicle is equipped with memory exterior mirrors and the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel. Select the vehicle to be tested from the diagnostic tool menu.
   • Check to make sure the program card is correctly installed.
   • Check the connections to the vehicle.
• Check the ignition switch position.

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• The mirrors are inoperative

• Circuitry.
• Central junction box (CJB) fuse.
• Exterior mirror control switch.

You May need to Use The Old Ignition Lock & Key ,Due to the Chip In the Key.


Circuit Description

The PCM has a memory area where it stores certain data it needs to save when the key is turned OFF. This area is called Keep Alive Memory. This diagnostic test monitors the PCM's keep alive memory for a loss or unintended change of data. If such a condition occurs, DTC P0603 will set.

Conditions for Setting the DTC

Test Condition

Test continuously.

Failure Condition

Keep alive memory checksum does not match previous checksum.

Action Taken When the DTC Sets

• Clear all keep alive memory locations.
• The Malfunction Indicator Lamp (MIL) will not illuminate.
• No message will be displayed.

Conditions for Clearing the DTC

• A History DTC will clear after forty consecutive warm-up cycles with no failures of any non-emission related diagnostic test.
• A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.
• PCM battery voltage is interrupted.
• Using a Scan tool.

Diagnostic Aids

If the battery has been disconnected for any reason DTC P0603 will set. The PCM keeps a running check on the memory; if memory changes it resets. An intermittent loss of power or ground to the PCM will cause a reset.