Electrical System - Information
NUMBER: 08-029-00GROUP: Electrical
DATE: Oct. 6, 2000
SUBJECT:
Minivan Electrical System Information
MODELS:
2001 (RS) Town & Country/Caravan/Voyager
2001 (RG) Chrysler Voyager (International Makets)
DISCUSSION:
This bulletin provides information related to the electrical system to clarify system operation/features/Diagnostic Trouble Codes (DTC's) that could be confusing to technicians that are unfamiliar with 2001 Minivans.
INTEGRATED POWER MODULE (IPM), previously known as the Power Distribution Center (PDC), is located next to the battery and has the following unique features:
Ignition Off Draw (IOD) Fuse Location - the IOD fuse is located in the IPM (Fig. 1) and must be installed prior to delivering the vehicle to the customer.
Changeable Power Feed To The Left Rear C-Pillar And Removable Center Console 12 Volt Power Outlets - C-pillar and removable center console (when positioned between the Quad seats) 12 volt power outlets can be changed from ignition feed to battery feed by changing the positioning of the fuse as shown in (Fig. 1). Also note, access to the removable center console 12 volt power outlet may be difficult unless the cell phone holder is temporarily removed from the forward lid.
DIAGNOSTIC TROUBLE CODES (DTC's) THAT COULD BE PRESENT:
The following DTC's may be set if certain features are operated while the Ignition Off Draw (IOD) fuse is removed. These DTC's should be cleared with a DRBIII(R). After cycling the ignition switch recheck for DTC"s: Powertrain Control Module (PCM): P1699 No Climate Control Bus Messages (Applies to Automatic Temperature Control (ATC) vehicles).
Instrument Cluster Loss Of Communication With Any Of The following: Body Control Module (BCM), Controller Antilock Brakes (CAB), Transmission Control Module (TCM) or Occupant Restraint Controller (ORC).
ATC Climate Control Module:
Engine Status Message Missing.
Front Control Module (FCM):
BCM Communication Fault (Occurs if hazard flasher is activated with IOD removed).
The following DTC's may be present in the FCM and may re-appear when cleared even if there is not a fault with the circuit. Care must be taken to properly diagnose these circuits:
Ignition Unlock-Run/Start Open: If the Brake Transmission Shifter Interlock (BTSI) feature functions normally this circuit is most likely functioning normally. This issue will be corrected with a future software release.
Side Air Bag Control Module Run Start Driver Over Current: If the technician can communicate with the side modules with a DRBIII(R)this circuit is most likely functioning normally. This issue will be fixed with a future FCM hardware change.
Body Control Module (BCM):
The following DTC's may appear when the battery is being serviced or the positive battery cable terminal is disconnected for service reasons. Care must be taken to properly diagnose these circuits:
^ IOD Wake-up Output Open or Short Circuit
^ VTA Lamp Output Open or Short Circuit
^ Left Turn Signal Indicator Output Open or Short Circuit
^ Right Turn Signal Indicator Output Open or Short Circuit
When the positive battery cable is disconnected, the BCM will log the above DTC's as active. Once the battery cable has been re-connected and tightened, the above DTC's become historical and should be cleared with a DRBIII(R).
THE FOLLOWING DTC'S CAN BE SET BY NORMAL OPERATION:
Power Sliding Door Control Module and Power Lift Gate Control Module:
Faults that can be set with normal obstacle detection:
^ Incomplete Power Open: Overcurrent
^ Incomplete Power Close: Overcurrent
Power Sliding Door Control Module:
The following DTC's can be set because of little or no PLG "Popoff":
^ Incomplete Latch Cinch Overcurrent
^ Incomplete Latch Release Overcurrent
The following DTC's can be set because of PLG non-engagement or something blocking the lift gate:
^ Incomplete Power Close Missing Hall Signal
^ Incomplete Power Close: Full Open Switch Failure
The following DTC's can be set because someone activates the PLG outside handle switch while the PLG ia ajar:
^ Incomplete Power Open Latch Failure
^ Incomplete Power Close Latch Failure
^ Incomplete Latch Cinch Pawl Switch Failure
^ Incomplete Latch Cinch Ratchet Switch Failure
^ Incomplete Latch Release Pawl Switch Failure
^ Incomplete Latch Release Ratchet Switch Failure
^ Incomplete Latch Cinch No Current
^ Incomplete Latch Release No Current
HEADLAMP OPTICAL HORN:
The headlamp optical horn will only function when the ignition key is in the accessory, unlock, run, or start positions.
BODY CONTROL MODULE (BCM) - FRONT CONTROL MODULE (FCM) - POWER SLIDING DOOR (PSD), POWER LIFT GATE (PLG), SIDE AIRBAG AND SPEAKER CONNECTORS TROUBLESHOOTING:
Do not insert a probe into the 1 .00 mm terminals used in the BCM, IPM, SAB, or speaker connectors because this can damage the inner contacts. The visible hood is an integral part of the terminal and should be used for continuity checking without entering the inside of the terminal.
When installing a 1 .00 mm style connector, be sure the secondary lock is in proper (lock) position. The secondary lock is the front part of the connector that is exposed, and should be centered when closed. In this position the terminal openings will be visible through the holes in the secondary lock.
AUDIO SYSTEM:
Name Brand Speaker (NBS) Relay: The relay that powers the Infinity speaker system (Sales Code RCE) is on the J1850 bus. Therefore the bus connection to the radio (Sales Codes RBB, RBK or RAZ) must be connected in order to power the Infinity speaker amplifiers.
The instrument panel speakers on the Infinity speaker system (Sales Code RCE) and 6-speaker system (Sales Code RCG) both get their feeds from the door speakers. If the door speaker is not connected, the IP speaker will not operate (left door/left IP & right door/right IP). This same situation also exists with Sales Code RCE rear quarter speakers and the "D"-pillar speakers. The "D"-pillar speakers get their feed from the rear quarter speakers.
CD Changer LED Operation: If there are no CD's loaded into the CD Changer, when the vehicle is started, the LED for disc # 1 will flash for about 15 seconds indicating that it is ready for a CD to be loaded. Customers may see this as a fault.
CD Changer Time Delay: There may be a lengthy delay (up to 16 seconds) to change discs and tracks for the CD changer.
Power Accessory Delay: When ignition is turned off, the radio will continue to operate, equipment plugged into ignition switched 12 volt accessory power outlets and the power windows will function for up to 45 seconds or until a front door is opened.
OVERHEAD CONSOLE:
An open circuit or no connection in the ambient temperature sensor circuit will cause the overhead console display to read -40F°, and 130F° will be displayed for a short in the ambient temperature sensor circuit.
Overhead Console Display Modules: The RS minivans have three possible overhead console display modules, a compass/temperature, a compass/temperature with trip computer and universal garage door opener and an Electronic Vehicle Information Center (EVIC) and universal garage door. Vehicle operators with vehicles equipped with a compass/temperature display may wish to purchase a compass/temperature with trip computer and universal garage door opener, no modifications to the vehicle are required to install the higher level module.
EVIC Personalization Menu: RS minivans equipped with EVIC have personalization menus similar to (WJ) Grand Cherokee. The customer can program features of his/her vehicle, using the EVIC, for their personal preference. This may be confusing to some. The owner's manual explains operation features clearly.
POWER SLIDING DOOR (PSD) AND POWER LIFT GATE OPERATION (PLG):
The Owner Manual and Glove Box Video descriptions of operation of the both the PSD and PLG are very clear and should be used as an additional reference. The following customer complaints may be attributed to normal vehicle operation:
PSD And PLG Inoperative From Remote Keyless Entry (RKE) Key Fob Switch Or Overhead Console Switch: Make sure the, vehicle is in Park or Neutral, vehicle speed is zero and the doors or lift gate are fully opened or fully closed. Additionally a power sliding door must be unlocked for its overhead console switch to function and ALL doors must be power unlocked for the overhead console switch for the power lift gate or the release handle in the lift gate light bar to function.
PSD Inoperative From "B"-Pillar Switch: Make sure the doors are unlocked, vehicle is in Park or Neutral, vehicle speed is zero and the sliding door is fully opened or fully closed. Also make sure the sliding door child safety lock switch(s) located on the rear shut face of the sliding doors and the lockout switch in the overhead console are not activated. The lockout switch in the overhead console only affects "B"-pillar switches.
PSD & PLG Reversal When An RKE, "B"-Pillar Or Overhead Console Switch is Actuated: PSD & PLG will not reverse to CLOSING when the RKE, : "B"-Pillar or Overhead Console switch is actuated during a power OPEN cycle. PSD & PLG will reverse to OPENING when the RKE, "B"-Pillar or Overhead Console switch is actuated during a power CLOSE cycle. This is normal operation.
REMOTE KEYLESS ENTRY (RKE):
Key Fob Functions: Three button RKE transmitters are provided with vehicle NOT equipped with a PSD. Six button transmitters are provided on vehicles equipped with at least one power sliding door. For non-power applications, the left sliding door button unlocks the left side doors. The lift gate button unlocks the lift gate for approximately 30 seconds. These differences are explained in the Owner Manual and the pink instruction card on the tilt lever.
Button Delay Feature On Key Fob: Approximately a one-third second delay has been implemented on the left, right, lift gate and panic buttons to help prevent accidental actuation. The delay feature can be disabled (except for panic) with the following key fob button press sequence: Press the Unlock button for 5 to 10 seconds; while the Unlock button is pressed (after 5 seconds) press the Lift Gate button; release both buttons. When the Button Delay is turned off, the system will respond immediately to the press of a button (this may result in unwanted activations of a powered feature or leaving the vehicle in an unsecured state. The Button Delay feature can be reactivated by repeating the key fob button press sequence.
Memory Seat, Mirror and Radio Station Presets Recall: The memory recall feature does not always work when the vehicle is unlocked with an RKE key fob button. Only the unlock button on the RKE key fob will activate the memory recall feature (assuming the RKE key fob has already been successfully linked / programmed to the memory system by the customer). If the left sliding door key fob button was pressed to unlock the left side of the vehicle and open the sliding door, the memory recall feature is not activated.
VEHICLE THEFT ALARM (VTA):
VTA Indicator Lamp: During the time the system is arming itself the VTA lamp will flash (approximately 16 seconds), a steadily lift VTA lamp indicates the hood is not secure or there is a DTC in the system.
VTA Disarming: The VTA cannot be disarmed with the lift gate key cylinder.
Please refer to the vehicle Owner Manual for detailed description of operation for any features the vehicle may be equipped with.
POLICY: Information Only