i'd start by rechecking the "MDS on" install to make sure all connectors near where you were working are well seated. also recheck where the previous harness would contact. i find it really hard to beleive that the old harness was too short. improperly routed perhaps, but too short???
U0154 - LOST COMMUNICATION WITH OCM (occupant classification module)
- When Monitored:
- With the ignition on
- IOD fuse installed
- FCM is configured correctly
- Set Condition: Bus messages not received from the Occupant Classification Module for approximately 2 to 5 seconds.
Possible Causes
CAN B BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
OCCUPANT CLASSIFICATION MODULE
OCCUPANT CLASSIFICATION MODULE POWER AND GROUND
MODULE THAT SET THIS DTC
OCM is located under passenger seat. make sure it's connector isn't loose.
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