Dodge Caliber. Manual — part 232
U0100-LOST COMMUNICATION WITH ECM/PCM
For a complete wiring diagram Refer to Section 8W.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 39
•
When Monitored:
With the ignition on.
Battery voltage between 10 and 16 volts.
IOD fuse installed.
•
Set Condition:
Bus messages not received from the PCM/ECM for approximately 500ms.
Possible Causes
CAN B OR CAN C BUS CIRCUITS OPEN OR SHORTED
DTC’S RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
ECM/PCM
ECM/PCM POWER AND GROUND
MODULE THAT SET THIS DTC
Diagnostic Test
1.
VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
With the scan tool, read active DTC’s.
Is this DTC active?
Yes
>> Go To 2
No
>> Refer to the Stored Lost Communication test procedure. Refer to the table of contents in this section.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE).
2.
CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC’S
With the scan tool, read all active DTC’s from all modules.
NOTE: Check for TIPM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or igni-
tion related DTC’s.
Does the scan tool display any active DTC’s to the conditions listed above?
Yes
>> Diagnose and repair the DTC. Refer to the Table of Contents for a complete list of the symptoms.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE).
No
>> Go To 3
3.
VERIFY THAT THE ECM/PCM IS ACTIVE ON THE BUS
Turn the ignition on.
With the scan tool, select ECU View.
Verify that the ECM/PCM is active on the bus.
Is the ECM/PCM active on the bus?
Yes
>> Go To 4
No
>> Refer to the Table of Contents located in this section for a no response test procedure.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
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4.
CHECK FOR ADDITIONAL COMMUNICATION RELATED DTC’S
With the scan tool, select Network View and select Advanced.
Is there more than one module with active DTC’s “Logged Against” the ECM/PCM?
Yes
>> Replace/update the ECM/PCM in accordance with the service information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE).
No
>> Replace/update the module that set this DTC in accordance with the service information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 41
U0101-LOST COMMUNICATION WITH TCM
For a complete wiring diagram Refer to Section 8W.
8E - 42
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
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