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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 34 (Hybrid Control Processor Module (HCP) - DTCS U0140-00 To U1129-00) >> DTC Troubleshooting >> U069E-00 Lost Communication With Coolant Heater "B" >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
LIN BUS COMMUNICATION DTCS
ELECTRIC COOLANT HEATER B+ CIRCUIT OPEN OR HIGH RESISTANCE
ELECTRIC COOLANT HEATER GROUND CIRCUIT OPEN OR HIGH RESISTANCE
ELECTRIC COOLANT HEATER

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .