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Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Hybrid Control Processor Module (HCP) - DTCS U0485-00 To U1008-00) >> DTC Troubleshooting >> U069E-00 Lost Communication With Coolant Heater "B" >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
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  . 

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