RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
When Performing The Actuator Circuit Test
CAUTION: Shorted common door driver circuits can cause additional Actuator Circuit Test messages to set for circuits where no condition exists to
cause a fault.
To ensure a proper diagnosis, repair all Short Too Complex messages first, all common door driver circuit related messages second, and all
other door driver circuit related messages last.
The DRB III can display up to three Actuator Circuit Test messages at a time. After repairing each Actuator Circuit Test message, cycle
the ignition switch, then rerun the Actuator Circuit Test to ensure no new messages exist.
The Short Too Complex message:
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indicates that a specific determination of which lines are shorted could not be made.
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is caused by more than three drivers being shorted in the same direction. For example, four drivers all shorted to ground, or two or more drivers
shorted with at least one driver shorted to ignition/battery and one driver shorted to ground.
Messages displaying:
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xxx Driver/Circuit Shorted to Ignition/Battery will set on a per-driver basis.
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XXX Driver/Circuit Shorted to Ground will set on a per-driver basis.
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the same two drivers/circuits shorted to ignition/battery as-well-as shorted to ground indicates that two actuator driver circuits are shorted together.
After the Actuator Circuit Test is run on systems with less than six actuators:
the actuator drive system is left in a state where further actuator positioning requests are ignored from both the panel and the DRB III. This state is
cleared by cycling the ignition switch (cycling power to the control).
If the test returns passed, then troubleshooting should proceed to clearing faults and running the HVAC Door Recalibration system test as a final check
of system health.
Interior Lighting
INTERIOR LIGHTING
The Instrument Cluster controls the Interior/Courtesy Lamps. The Instrument Cluster activates the courtesy lamps when either a Dome Lamp switch is
turned ON or a door is opened. The Instrument Cluster also monitors the output of the Glove Box and Map lamps. The Cargo lamps are controlled by the
Instrument Cluster, it receives an output message from the Headlamp switch to turn ON the lamps. The Instrument Cluster provides battery protection by
shutting down the interior lamps when a door or courtesy/map lamp is left on or open.
Mechanical Instrument Cluster (MIC)
INSTRUMENT CLUSTER
The DR Instrument Cluster is a new type of control module that includes the hardware and software necessary to function as the cluster and the body
control module. The Instrument Cluster houses the Speedometer, Tachometer, Fuel gauge, Coolant Temperature gauge, Oil Pressure gauge, and the
Voltage gauge. The cluster positions all of the gauges using PCI bus messages received from the PCM. The cluster contains certain warning indicators,
depending on engine type and options. Some of the indicators are hardwire inputs and some indicators are controlled via PCI bus messages. The warning
chime tone generator is contained within the cluster. The cluster includes a Vacuum Fluorescent (VF) display for the PRNDL, Total and Trip
Odometers. The VF will also display warning messages such as door ajar, low washer fluid level, engine hours, and no bus communications. The cluster
has the ability to set and store DTC's, communicate on the PCI bus, display engine information, and display certain inputs using the DRB III.
The following systems are controlled either completely by the Instrument Cluster or in conjunction with other inputs received by hardwire or via the PCI
bus:
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Audible Warnings
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Brake Lamp Control
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Brake Transmission Shift Interlock (BTSI)
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Cargo Lamp Control
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Central Locking
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Door Lock Inhibit
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Enhanced Accident Response
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Exterior Lighting Control
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Exterior Lighting Fail-Safe
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Heated Seat Control
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Interior Lamp Control
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Interior Lamps - Enhanced Accident Response
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Interior Lamps Load Shedding
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Lamp Out Indicator Control
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Panel Lamps Dimming Control
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Parade Mode
