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Re: the radio won't shut off when door is open and car is...
If the radio used to turn off but now it doesn't then you have a short
either in the wiring or in the radio itself. If you are knowledgeable
about automotive electrical wiring and have a volt meter or test light
you can troubleshoot it yourself to see where the problem is, otherwise
you need to take it to a car stereo shop and have them check the 12
volt connections at the back of the radio to make sure the red (NOT
BLUE)accessory wire to the radio is not showing 12 volts when the
ignition key is turned off.
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
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The modules listed below all receive a RAP message from the dash integration module (DIM) module over the serial data circuits. The DIM module monitors the ignition switch position, battery condition and passenger compartment door status to determine whether RAP should be initiated. The DIM module then sends a message to the listed modules telling them that they are in RAP power mode. The modules then support the operation of the systems under their control as required by their RAP power mode strategy.
RAP will end when one of the following conditions are met:
• The DIM module receives an input as a serial data message from the driver door module (DDM) indicating the opening of a passenger compartment door.
• The DIM module receives a message from its internal timer indicating the end of the RAP period after 10 minutes.
• The DIM module detects a decrease in battery capacity below a prescribed limit.
• The transition from OFF to RUN/ON or ACC of the ignition switch.
The DIM module then sends a serial data message to the listed modules ending the RAP function.
The modules receiving serial data messages for RAP functions are:
• The driver door module (DDM)
• The radio
• The rear integration module (RIM)
• The vehicle communication interface module (VCIM)-Generation F1
• The vehicle interface unit (VIU)-Generation 2.6
The Rap relay could be bad (stuck contact's ) or one of the three module's that make up the body control system . Having the vehicle checked for DTC'S - diagnostic trouble codes should be the first step in diagnosing this type problem .
Driver door switch ,ajar switch . This switch is a input to the BCM - body control module .
Retained Accessory Power Description and Operation
Retained accessory power (RAP) is a vehicle power mode that permits the operation of selected customer convenience items after the ignition switch is turned OFF. These selected items will remain in operation until a passenger compartment door or liftgate is opened or until the RAP function timer reaches its shut-off limit.
The class 2 RAP power mode is mapped to GMLAN serial data circuit as Off Awake power mode. Refer to Data Link Communications Description and Operation for more information on data link communications. The BCM monitors the ignition switch signals, battery condition and the doors status to determine whether RAP should be initiated. The modules that support the RAP power mode will operate the systems under their control as required by their RAP power mode strategy.
RAP will end when one of the following conditions is met:
• The BCM detects the opening of a passenger compartment door.
• The RAP timer expires.
• The battery capacity decreases below a prescribed limit.
• Any other ignition switch state is chosen.
The function supported in the RAP power mode is the operation of the radio.
Could be relay contact's stuck closed allowing power to stay on . Or it could be a BCM - body control module problem .
Retained Accessory Power (RAP)
The retained accessory power (RAP) system allows certain vehicle functions to operate for a specific amount of time after the ignition switch is turned OFF. The body control module (BCM) monitors the ignition switch position, battery condition, and each door ajar switch status to determine whether RAP should be initiated or terminated. RAP is controlled with two different methods; serial data and relay control. Some modules receive a RAP message from the BCM over the serial data circuits. Serial data controlled RAP is deactivated as required by their modules RAP power mode operation. Other subsystems are activated directly by the BCM through a RAP relay. Components and systems that are active in RAP are also activated anytime the ignition is any position other than OFF regardless of the door switch signals.
Relay Controlled RAP
The BCM keeps the RAP relay energized during all power modes, except Off-Awake and Crank. The relay is also energized for approximately 10 minutes after shutting the ignition OFF and removing the key, providing no door is opened.
Relay controlled RAP will end when one of the following conditions is met:
• The BCM receives an input from any door ajar or open switch indicating the opening of any door after the ignition key is out of the ignition.
Important: If the BCM is receiving any door ajar or open signal from those switches when the ignition key is turned OFF, RAP will not initiate.
• The BCM internal timer for the RAP expires after approximately 10 minutes.
• The BCM detects a decrease in battery capacity below a prescribed limit.
Systems powered by the RAP relay during the RAP power mode are as follows:
• A/T shift lock control solenoid assembly (w/ floor shifter)
• Power window circuit breaker
• RAP fuse
• Inside rearview mirror (DD6)
• Sunroof (CF5)
Serial Data Controlled RAP
RAP systems controlled by serial data are as follows:
Radio RAP activation/termination is the same as relay operation with 1 exception; the only door switch that will turn off the radio during RAP is the driver door open switch.
Vehicle Communication Interface Module (VCIM) (Onstar®)
VCIM RAP activation/termination is the same as radio operation with 1 exception; if there is an active call when the ignition key is turned off the VCIM will remain in RAP mode, and keep the radio in RAP mode until the call is terminated.
Do you know what a DTC - diagnostic trouble code is ?
DTC B1475 00: Retained Accessory Power Circuit
First of all...does your truck have the retained accessory power (RAP)? If it does, the radio would always stay on with the key off until you open the drivers door. If it does have RAP and the door pin on the drivers door has went bad, then the truck doesn't know that you opened the door and continues to allow accessory power (although it would still cut off after about 20 minutes). If the interior lights come on when you open the door, then the pin is ok. If the lights come on, it could be the RAP relay. If it has gone bad, it is possible it is stuck supplying power and needs replacing. The relay should be labeled in the fuse panel, and there should be other relays in the panel with the same part number. You can swap a relay for the RAP relay and see if it fixes the problem...if it does fix it swap the relays back and replace the RAP relay. If the truck doesn't have RAP then it is possible the problem is in the radio..if you have a friend with a GM car or truck close to the same year you could swap radios and see if that fixes your problem...should be pretty simple. pull the cover off the dash, it just clips on, take out a couple screws that hold in the radio, unplug it and plug in the other radio. sorry so long winded...hope this helps you somewhat.