Dodge Viper SRT-10 (ZB). Manual — part 59
Entry (RKE) lock/unlock button under these condi-
tions result in normal lock/unlock activation.
• Exterior Lighting
• Fade to Off Interior Lamps - This feature dims
the interior lighting (courtesy lamps) gradually if the
BCM does not receive any new inputs that would
cause the interior lamps to remain on.
• Fuel Level
• Headlamp Time Delay
• Horn
• Ignition Switch Status
• Illuminated Entry
• Interior Lighting (Courtesy/Reading Lamps)
• Power Door Virtual Locks
• Power Windows - Includes Auto Down feature
• Pulse Width Modulated Instrument Panel Dim-
ming
• Remote Keyless Entry (RKE)
• Smart Glass
• Tire Pressure Fault Detection
• Vehicle Theft Security
• Virtual Lock Automatic Door Locks
All features on the BCM are standard except Day-
time Running Lamps (DRL). The customer/dealer has
the ability enable or disable the following features:
• Auto Lock Disable
• Daytime Running Lamps Enable (U.S. - Option,
Canada - Enabled)
• Headlamp Delay Disable
• Power Accessory Delay Disable
• RKE Horn Chirp Disable
• RKE Optical chirp Disable
• RKE Unlock - All - one press Enable
CAUTION: Do not swap Body Control Modules
between vehicles or body controller’s off the shelf.
The BCM has internal diagnostic capability that
assists in diagnosing the system error. When an
OPEN or a SHORT circuit exists, the diagnostic tool
can be used to read the BCM faults. The faults are
very descriptive in identifying the appropriate fea-
ture that has faulted.
The only two faults that the BCM logs that con-
clude the replacement of a BCM are faults;
• # 06 - Internal BCM failure (replace BCM)
• # 31 - J1850 Internal Hardware Failure (replace
BCM)
Otherwise the appropriate diagnostic procedures
for each of the features should be taken when the
BCM logs a fault. Refer to the proper Body Diagnos-
tic Procedures manual.
BATTERY SAVE MODE
NORMAL OPERATING MODE The battery save mode is
enabled by performing the following:
(1) Insert the key into the ignition cylinder.
(2) Cycle the ignition key from OFF to ACC four
times without going to the RUN position.
(3) Leave the switch in the OFF position after the
fourth cycle. This puts the BCM into the LEARN
mode.
(4) Using the drivers door lock switch, UNLOCK
the power locks. A single chime and a horn chirp will
tell the customer that the battery save mode is being
enabled.
• VTSS may be armed before the BCM Sleep
Mode starts by using the RKE or the door lock
switch.
• All interior and exterior lights will be turned off.
• Accessory delay will be cancelled.
• Cycling the ignition to RUN will cancel the fea-
ture. NOTE: The customer can enter and exit
the vehicle by pressing the exterior door han-
dle, this will wake up the BCM. If the vehicle
was locked, then the customer must use the
RKE Unlock and then press the exterior handle
again. If the ignition is NOT cycled to RUN,
then the BCM will re-enable this feature.
SHIPPING MODE
When the vehicle is shipped it will be in the Shipping
Mode. The BCM will enter battery save mode immediately
after it goes to sleep. This is providing the following are
performed:
• Ignition Off Draw (IOD) (radio fuse on this vehi-
cle) is pulled (this sees Radio Bus Communication
Fault).
• Ignition has been cycled to RUN or ACCES-
SORY.
• Ignition is in LOCK (with or without the key in
the ignition).
• All interior and exterior lights will be turned off
• Accessory delay will be cancelled.
• The BCM has recorded less than 50 vehicle
miles).
VEHICLE START UP If the VTSS is armed when it goes into
battery save mode, it will wake up in the 15 minute lights
flashing alarm mode. You must disarm the VTSS with the
RKE UNLOCK button or the VTSS will start alarming
whenever another monitored input is active.
(1) Wake the vehicle up by pressing the Driver
side exterior door handle.
(2) If the door does not open, the vehicle is armed
(VTA lamp will start flashing). Press the RKE unlock
button and then press the exterior door handle.
(3) If the VTSS is active there will be a 15 minute
lights only alarm.
8E - 2
ELECTRONIC CONTROL MODULES
ZB
BODY CONTROL MODULE (Continued)
(4) Place ignition in the RUN position (this exits
Battery save mode and places the BCM in the nor-
mal powered state).
REMOVAL
(1) Open deck lid.
(2) Remove four bolts to battery compartment
cover and remove cover.
(3) Disconnect and isolate the battery negative
cable.
(4) Wait two minutes for the airbag system reserve
capacitor to discharge before beginning any airbag
system or instrument panel component service.
(5) Disconnect
the
five
Body
Control
Module
(BCM) electrical connectors.
(6) Remove the four retaining nuts to the BCM.
(7) Remove the BCM from the vehicle.
INSTALLATION
(1) Install the BCM in the vehicle.
(2) Install the four retaining nuts to the BCM.
(3) Connect the five Body Control Module (BCM)
electrical connectors.
(4) Connect the battery negative cable.
(5) Install battery compartment cover and install
four retaining bolts.
(6) Close deck lid.
(7) Verify vehicle and system operation.
CONTROLLER ANTILOCK
BRAKE
DESCRIPTION
The controller antilock brake (CAB) is a micropro-
cessor-based device which monitors the ABS system
during normal braking and controls it when the vehi-
cle is in an ABS stop. The CAB is mounted to the
HCU (hydraulic control unit) as part of the ICU
(integrated control unit) (Fig. 1). The CAB uses a
24-way wiring connector on the vehicle wiring har-
ness. The power source for the CAB is through the
ignition switch in the RUN or ON position.
OPERATION
The primary functions of the controller antilock
brake (CAB) are to:
• monitor the antilock brake system for proper
operation.
• detect wheel locking or wheel slipping tenden-
cies by monitoring the speed of all four wheels of the
vehicle.
• control fluid modulation to the wheel brakes
while the system is in ABS mode.
• store diagnostic information.
• provide communication to the DRBIIIt scan tool
while in diagnostic mode.
The CAB constantly monitors the antilock brake
system for proper operation. If the CAB detects a
fault, it will turn on the amber ABS warning indica-
tor lamp and disable the antilock braking system.
The normal base braking system will remain opera-
tional.
The CAB continuously monitors the speed of each
wheel through the signals generated by the wheel
speed sensors to determine if any wheel is beginning
to lock. When a wheel locking tendency is detected,
the CAB commands the CAB command coils to actu-
ate. The CAB command coils then open and close the
valves in the HCU that modulate brake fluid pres-
sure in some or all of the hydraulic circuits. The CAB
continues to control pressure in individual hydraulic
circuits until a locking tendency is no longer present.
The CAB contains a self-diagnostic program that
monitors the antilock brake system for system faults.
When a fault is detected, the amber ABS warning
lamp is turned on and the fault diagnostic trouble
code (DTC) is then stored in a diagnostic program
memory. These DTC’s will remain in the CAB mem-
ory even after the ignition has been turned off. The
DTC’s can be read and cleared from the CAB mem-
ory by a technician using the DRBIII scan tool. If not
cleared with a DRBIII scan tool, the fault occurrence
and DTC will be automatically cleared from the CAB
memory after the identical fault has not been seen
during the next 3,500 miles of vehicle operation.
Fig. 1 Integrated Control Unit (Typical)
1 - PUMP/MOTOR
2 - HCU
3 - PUMP/MOTOR CONNECTOR
4 - CAB
ZB
ELECTRONIC CONTROL MODULES
8E - 3
BODY CONTROL MODULE (Continued)
CONTROLLER ANTILOCK BRAKE INPUTS
• Wheel speed sensors (four)
• Brake lamp switch
• Ignition switch
• System relay voltage
• Ground
• Diagnostic communication (PCI)
CONTROLLER ANTILOCK BRAKE OUTPUTS
• Amber ABS warning indicator lamp actuation
(through ABS relay in the PDC)
• Red BRAKE warning indicator lamp actuation
(through Brake Warning Lamp relay in the PDC)
• Diagnostic communication (PCI)
REMOVAL
(1) Disconnect battery negative (-) terminal.
(2) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(3) Remove left front tire and wheel assembly.
(Refer to 22 - TIRES/WHEELS - REMOVAL)
(4) Remove access panel in forward portion of left
front wheel well.
(5) Pull outward on connector lock and disconnect
24-way connector at CAB (Fig. 2).
(6) Disconnect pump/motor wiring harness connec-
tor at CAB (Fig. 1).
(7) Remove four CAB mounting bolts (Fig. 2).
(8) Slide CAB off HCU and remove.
INSTALLATION
(1) Install CAB onto HCU.
(2) Install four CAB mounting bolts and tighten to
2 N·m (17 in. lbs.) torque (Fig. 2).
(3) Connect pump/motor wiring connector (Fig. 1).
CAUTION: Before installing the 24-way connector in
the CAB, be sure the seal is properly installed in
the connector.
(4) Install 24-way connector into socket of CAB as
follows:
(a) Position 24-way connector in socket of CAB
and carefully push it down as far as possible.
(b) Once connector is fully seated into CAB
socket, push connector lock inward. This pulls con-
nector into socket of CAB and locks it in place.
(5) Install access panel in forward portion of left
front wheel well.
(6) Install tire and wheel assembly (Refer to 22 -
TIRES/WHEELS - INSTALLATION). Progressively
tighten the wheel mounting nuts in the proper
sequence to 122 N·m (90 ft. lbs.) torque.
(7) Lower vehicle.
(8) Reconnect battery negative (-) terminal.
(9) Connect DRBIII
t to data link connector below
steering column to initialize new CAB. Check for any
faults.
(10) Road test vehicle to ensure proper operation
of ABS.
DATA LINK CONNECTOR
DESCRIPTION
The data link connector is located inside the vehi-
cle, below the instrument panel.
OPERATION
The data link connector (diagnostic connector)
links the DRBIII
t scan tool with the On-Board Diag-
nostics (OBD) and allows the DRBIII
t to communi-
cate with the vehicle modules.
POWERTRAIN CONTROL
MODULE
DESCRIPTION
OPERATION - SENSOR RETURN - PCM INPUT
The sensor return circuit provides a low electrical
noise ground reference for all of the systems sensors.
The sensor return circuit connects to internal ground
circuits
within
the
Powertrain
Control
Module
(PCM).
Fig. 2 CAB Mounting
1 - CONNECTOR LOCK
2 - 24-WAY CONNECTOR
3 - CAB MOUNTING SCREWS
8E - 4
ELECTRONIC CONTROL MODULES
ZB
CONTROLLER ANTILOCK BRAKE (Continued)
OPERATION - DATA BUS COMMUNICATION
RECEIVE - PCM INPUT
The PCM uses the SCI communication bus to per-
form engine diagnostics and flash operations. The
PCM uses the J1850 bus to communicate with vari-
ous electronic modules within the vehicle.
OPERATION - IGNITION SENSE - PCM INPUT
The ignition sense input informs the Powertrain
Control Module (PCM) that the ignition switch is in
the off or run position.
OPERATION - PCM GROUND
Ground is provided through multiple pins of the
PCM connector. Depending on the vehicle there may
be as many as two different ground pins. There are
power grounds and sensor grounds.
The power grounds are used to control the ground
side relays, solenoids, ignition coil or injectors. The
signal ground is used for any input that uses sensor
return for ground.
The PCM case is shielded to prevent RFI and EMI.
The PCM case is grounded.
Internally all grounds are connected together, how-
ever there is noise suppression on the sensor ground.
OPERATION
OPERATION
The Powertrain Control Module (PCM) is a digital
computer containing a microprocessor (Fig. 3). The
PCM receives input signals from various switches
and sensors that are referred to as PCM Inputs.
Based on these inputs, the PCM adjusts various
engine and vehicle operations through devices that
are referred to as PCM Outputs.
PCM Inputs:
• A/C Pressure Transducer
• Air Conditioning Controls
• ASD Sense
• Battery Temperature
• Battery voltage
• Brake Switch
• Camshaft Position Sensor
• Crankshaft Position Sensor
• Engine Coolant Temperature Sensor
• Ignition Switch
• Intake Air Temperature Sensor
• J1850 Bus
• Leak Detection Pump Switch
• Manifold Absolute Pressure (MAP) Sensor
• Oil Pressure Sensor
• Oil Temperature Transducer
• Oxygen Sensors
• SCI Receive
• Throttle Position Sensor
• Vehicle Speed Sensor
PCM Outputs:
• Air Conditioning Clutch Relay
• Auto Shutdown (ASD) Relay
• Data Link Connector
• Duty Cycle EVAP Canister Purge Solenoid
• Double Start Override Relay
• Downstream O2 Heater Relay
• Fuel Injectors
• Fuel Pump Relay
• Generator Field Ground Control
• Hydraulic Fan Solenoid Control
• Idle Air Control Motor
• Ignition Coils
• J1850 Bus
• SCI Transmit
• Reverse Gear Lockout Solenoid
• Upstream O2 Heater Control
• 2nd/ 3rd Gear Lockout Solenoid
Based on inputs it receives, the PCM adjusts fuel
injector pulse width, idle speed, ignition spark
advance, ignition coil dwell and EVAP canister purge
operation. The PCM regulates the cooling fan, and
air conditioning. The PCM changes generator charge
rate by adjusting the generator field. The PCM also
performs diagnostics.
The PCM adjusts injector pulse width (air-fuel
ratio) based on the following inputs.
• Battery voltage
• Coolant temperature
• Intake air temperature
• Exhaust gas content (oxygen sensor)
• Engine speed (crankshaft position sensor)
• Manifold absolute pressure
• Throttle position
Fig. 3 PCM LOCATION
ZB
ELECTRONIC CONTROL MODULES
8E - 5
POWERTRAIN CONTROL MODULE (Continued)
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