RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN C (2002)
NOTE: If the "CAL" message remains in the display, either there is excessive magnetism near the compass, or the unit is faulty. Repeat the calibration
procedure at least one more time.
If the wrong direction is still indicated in the compass display, the area selected for calibration may be too close to a strong magnetic field.
Repeat the calibration procedure in another location.
Setting Magnetic Zone Variance
Compass Variance
Compass Variance is the difference between Magnetic North and Geographic North. In some areas of the country; the difference between Magnetic and
Geographic North is great enough to cause the compass to give false readings. If this occurs, the compass variance must be set.
To set the variance:
*
Turn the ignition ON and set display to Comp./Temp.
*
Simultaneously press both the US/M and STEP button for 0.1 to 2 seconds. The VAR indicator will light up and the current zone number will be
displayed.
*
Press STEP button to select the proper variance zone as shown on the map. After 5 seconds of inactivity the displayed zone will be automatically
set, and normal operation will resume.
Door Ajar System
The Door Ajar System
The open or closed state of the doors is used by various vehicle control modules. The driver and passenger door each has an associated door ajar switch.
When a vehicle door is opened, it causes its associated ajar switch to close. In Inputs/Ouputs, the DRB III (R) will display the status of the associated
ajar switch, not the door position. If a door is closed, and the DRB III (R) displays the ajar switch as CLOSED, it is an indication of a shorted circuit or
component. If a door is open and the DRB III (R) displays OPEN, it indicates an open circuit or component.
Enhanced Accident Response
Enhanced Accident Response
If the Airbag Control Module (ACM) deploys the airbags, a message is transmitted over the CCD bus to the CTM module to unlock the doors. The
interior lights will be turned ON 10 seconds after getting zero speed message on the CCD bus.
In addition to unlocking the doors, the lock feature will be disabled for a predetermined amount of time following the deployment. Once the ignition key
has been cycled to the "OFF" position, normal operation will resume. This is a programmable feature.
Interior Lighting
Interior Lighting
The courtesy lights are controlled by the CTM. The door switches are inputs to the CTM and the courtesy lights are outputs. The glove box lamp and the
ash receiver lamp (if equipped) are not controlled by the CTM. They are hardwired to individual switches and fuses. The ignition key halo lamp is
controlled by the CTM and will remain ON for thirty seconds after the door is closed.
The highline CTM also provides for illuminated entry option. If the CTM detects an unlock signal from the RKE transmitter, a door disarm switch input
or the door jamb switch input, the interior courtesy lights will be turned ON. The illuminated entry function is canceled if the CTM senses an ignition
"on" condition or the "lock" command from a valid key fob.
If a door is left open or the dome lamp switch is left in the "on" position for more than fifteen minutes, the CTM will extinguish the lamps to avoid
discharging the battery.
Mechanical Instrument Cluster (MIC)
MECHANICAL INSTRUMENT CLUSTER (MIC)
The highline MIC is only available for gas vehicles. The gauges are positioned with information received by the cluster over the CCD bus from the PCM
. The MIC is hardwired to the CTM providing the warning lamp announcement chimes.
There is a self test available for the cluster that will actuate all the gauges at their calibration points. The test will not run if the cluster sees engine RPM
or vehicle speed. This test will light all CCD controlled indicators for verification of indicator operation. It also forces the odometer vacuum fluorescent
