Chrysler Town, Dodge Caravan. Manual — part 878
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Install a substitute CMTC/EVIC Module in place of the original module.
With the DRBIII
t, erase DTCs.
Turn the ignition on.
Cycle the ignition on and off, leaving the ignition in the on position for at least 15
seconds each time.
With the DRBIII
t, read DTCs.
Did the DTC reset?
All
Yes
→ Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the CMTC/EVIC Module.
Perform BODY VERIFICATION TEST - VER 1.
4
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
748
OVERHEAD CONSOLE
OTIS MODULE MESSAGE MISMATCH —
Continued
Symptom:
OTIS MODULE MESSAGE MISMATCH (DIESEL)
When Monitored and Set Condition:
OTIS MODULE MESSAGE MISMATCH (DIESEL)
When Monitored:
With the ignition on.
Set Condition:
FCM has learned EC Mirror but the vehicle is Not equipped with EC
Mirror.
POSSIBLE CAUSES
INTERMITTENT CONDITION
CMTC/EVIC COMMUNICATION
CMTC/EVIC MODULE
FRONT CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
NOTE: All communication DTC(s) that may have set along with this DTC
must diagnosed before continuing.
NOTE: If the DTC EC Mirror Day/Night Line Fault is present in the EVIC
along with this DTC, diagnose the EC Mirror Day/Night Line Fault first
before continuing.
With the DRBIII
t, erase the DTC.
Cycle the ignition on and off several times, leaving the ignition on for at least 15
seconds.
With the DRBIII
t, read DTCs.
Did the DTC OTIS Module Message Mismatch reset?
All
Yes
→ Go To 2
No
→ Go To 4
2
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the CMTC/EVIC Module.
Can communication be established with the CMTC/EVIC Module?
All
Yes
→ Go To 3
No
→ Refer to the Communication Category and perform the appropri-
ate symptom.
Perform BODY VERIFICATION TEST - VER 1.
749
OVERHEAD CONSOLE
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Install a substitute CMTC/EVIC Module in place of the original module.
With the DRBIII
t, erase DTCs.
Turn the ignition on.
Cycle the ignition on and off, leaving the ignition in the on position for at least 15
seconds each time.
With the DRBIII
t, read DTCs.
Did the DTC reset?
All
Yes
→ Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the CMTC/EVIC Module.
Perform BODY VERIFICATION TEST - VER 1.
4
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
750
OVERHEAD CONSOLE
OTIS MODULE MESSAGE MISMATCH (DIESEL) —
Continued
Symptom:
*REPAIRING CMTC DISPLAYS DOUBLE DASH ( - - ) IN TEMP
DISPLAY
POSSIBLE CAUSES
NO RESPONSE - PCI BUS - FRONT CONTROL MODULE
CMTC BUS MESSAGE FAILURE
COMPASS MINI-TRIP COMPUTER
AMBIENT TEMPERATURE SENSOR
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR CIRCUIT
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
AMBIENT TEMPERATURE SENSOR RETURN CIRCUIT OPEN
INTELLIGENT POWER MODULE
FRONT CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, select System Monitors, J1850 Module Scan.
Does the DRBIII
t display FCM on the BUS?
All
Yes
→ Go To 2
No
→ Refer to the COMMUNICATIONS category and perform the
appropriate symptom.
2
Turn the ignition on.
With the DRBIII
t, select Body, Compass Mini-Trip, System Tests, then Auto Self
Test.
Does the DRBIII
t display TEST FAILED: Bus Message Failure?
All
Yes
→ Refer to the COMMUNICATIONS category and perform the
appropriate symptom.
No
→ Go To 3
3
Turn the ignition on.
With the DRBIII
t, select Body, Compass Mini-Trip, System Tests, then Auto Self
Test.
Does the DRBIII
t display TEST FAILED: Internal EVIC Failure?
All
Yes
→ Replace the Compass Mini-Trip Computer in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
751
OVERHEAD CONSOLE
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