Grand Caravan V6-3.3L VIN R (2005)
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After selecting the proper zone number, momentarily press and release the C/T button. The variance zone is then stored in the memory and the C/T
returns to normal operation.
COMPASS CALIBRATION
The compass module has 2 types of auto calibration; slow-cal and fast-cal. Slow-cal ensures that during normal vehicle operation th0e compass performs
auto-calibration functions to keep the compass sensors in their proper operating range. Whenever the ignition is On and the CT/CMTC/ EVIC receives
PCI bus data indicating that engine RPM is greater than zero, auto-calibration is performed continuously.
If the calibration information stored in the compass module memory is not within the normal range after a power-up cycle, the compass will display
CAL.
The CT/CMTC/EVIC will enter into the fast-cal mode until calibration is complete. To enter the compass into Manual Calibration mode, perform the
following steps:
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Drive the vehicle to an area away from any large metal objects or overhead power lines.
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Ensure that the proper variance zone is selected. See "Setting Magnetic Zone Variance".
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The ignition switch must be in the On position and the CMTC/EVIC display must not be blank.
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Press the C/T button to view the Compass/ Temperature display.
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Press and hold the RESET button (approximately 10 seconds) until CAL is displayed, then release the button.
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Drive slowly, less than 5 MPH (8 KPH) in at least 1 complete 360-degree circle.
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CAL will remain illuminated to alert the driver that the compass is in the calibration mode.
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After calibration is complete, CAL will turn off.
NOTE: For C/T Manual Calibration, perform the same procedure as above, but press and hold the C/T and US/M buttons until CAL is displayed.
If the compass appears blank, unable to be calibrated, or the compass displays false indications,the vehicle must be demagnetized.
SELF-CHECK DIAGNOSTICS
The CT/CMTC/EVIC is capable of performing a diagnostic self check on its internal functions. Diagnostics may be performed using a DRBIII(R) or by
using the following procedure:
1. For CMTC/EVIC: With the ignition switch in the OFF position, depress and hold the RESET and the STEP buttons. For CT: With the ignition
switch in the OFF position, depress and hold the C/T and the US/M buttons.
2. Turn the ignition switch to the ON position.
3. Continue to hold both buttons until the software versions are displayed, then release the buttons.
4. All of the VFD segments will illuminate for 2-4 seconds. Check for segments that do not illuminate or illuminate all the time.
5. When the self-check is complete the EVIC will display one of the following messages:
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PASS SELF TEST
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FAILED SELF TEST
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NOT RECEIVING J1850 MESSAGE When the self-check is complete the CT/CMTC will display one of the following messages:
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PASS
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FAIL
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BUS
1. To exit the self-check mode:
For the CMTC/EVIC: Depress the STEP or RESET button, or cycle the ignition switch and the CMTC/EVIC will return to normal operation.
For the C/T: Depress the C/T or US/M button, or cycle the ignition switch and the CT will return to normal operation.
If a Communication fault is displayed, refer to the symptom list. If a FAIL or FAILED is displayed, the CT/CMTC/EVIC must be replaced.
AMBIENT TEMPERATURE SENSOR
