Diagnostic Test- VF-BEV Coolant Pumps

WARNING: This page is about a different car, the 2024 RAM ProMaster EV. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC TESTS
P0C73-00-MOTOR ELECTRONICS COOLANT PUMP "A" CONTROL PERFORMANCE	Repair any low voltage DTCs and retest. If OK, go to step 2. Repair any LIN Bus communication DTCs and retest. If OK, go to step 3. Check the Cooling Loop for the following: Low coolant level. Leaks in the Cooling Loop. Restrictions such as pinched or blocked hoses. Repair Cooling Loop and retest. If OK, go to step 5. Load test the B+ feed to the Electric Drive Motor (EDM) Coolant Pump. Repair if necessary and retest. If OK, go to step 6. Load test the Ground to the Electric Drive Motor (EDM) Coolant Pump. Repair if necessary and retest. If OK, go to step 7. If all powers and grounds load test OK, replace the Electric Drive Motor (EDM) Coolant Pump in accordance with the Service Information.
P1EA2-00-MOTOR ELECTRONICS COOLANT PUMP "A" TEMPERATURE SENSOR PERFORMANCE	Check the Cooling Loop for the following: Low coolant level. Leaks in the Cooling Loop. Restrictions such as pinched or blocked hoses. Repair Cooling Loop and retest. If OK, go to step 3. Replace the Electric Drive Motor (EDM) Coolant Pump in accordance with the Service Information.
P1EA4-00-HYBRID-EV BATTERY PACK COOLANT PUMP "A" TEMPERATURE SENSOR PERFORMANCE	Check the Cooling Loop for the following: Low coolant level. Leaks in the Cooling Loop. Restrictions such as pinched or blocked hoses. Repair Cooling Loop and retest. If OK, go to step 3. Replace the Battery Coolant Pump in accordance with the Service Information.
P1EA5-00-COOLANT PUMP "A" TEMPERATURE SENSOR PERFORMANCE	Check the Cooling Loop for the following: Low coolant level. Leaks in the Cooling Loop. Restrictions such as pinched or blocked hoses. Repair Cooling Loop and retest. If OK, go to step 3. Replace the Cabin Heater Electric Coolant Pump in accordance with the Service Information.
P2601-00-ELECTRTIC COOLANT PUMP CONTROL CIRCUIT PERFORMANCE/STUCK OFF	Repair any Low voltage DTCs and retest. If OK, go to step 2. Check the Cooling Loop for the following: Low coolant level. Leaks in the Cooling Loop. Restrictions such as pinched or blocked hoses. Repair the Cooling Loop and retest. If OK, go to step 4. Load test the B+ feed to the Cabin Heater Electric Coolant Pump. Repair if necessary and retest. If OK, go to step 5. Load test the Ground to the Cabin Heater Electric Coolant Pump. Repair if necessary and retest. If OK, go to step 6. If all powers and grounds load test OK, replace the Cabin Heater Electric Coolant Pump in accordance with the Service Information.
P2B28-00-HYBRID-EV BATTERY PACK COOLANT PUMP "A" PERFORMANCE	Repair any Low voltage DTCs and retest. If OK, go to step 2. Check the Cooling Loop for the following: Low coolant level. Leaks in the Cooling Loop. Restrictions such as pinched or blocked hoses. Repair the Cooling Loop and retest. If OK, go to step 4. Load test the B+ feed to the Battery Coolant Pump. Repair if necessary and retest. If OK, go to step 5. Load test the Ground to the Battery Coolant Pump. Repair if necessary and retest. If OK, go to step 6. If all powers and grounds load test OK, replace the Battery Coolant Pump in accordance with the Service Information.
P2B29-00-HYBRID/EV BATTERY PACK COOLANT PUMP "A" OVERSPEED /AIR IN SYSTEM	Check the Cooling Loop for the following: Low coolant level. Leaks in the Cooling Loop. Restrictions such as pinched or blocked hoses. Air pockets in the Cooling Loop. Perform FILLING THE BATTERY COOLING SYSTEM procedure in accordance with the Service Information. Refer to FILLING - LOW TEMP/BATTERY COOLING SYSTEM . Repair Cooling Loop and retest.
P2D01-00-MOTOR ELECTRONICS COOLANT PUMP "A" OVERSPEED/AIR IN SYSTEM	Check the Cooling Loop for the following: Low coolant level. Leaks in the Cooling Loop. Restrictions such as pinched or blocked hoses. Air pockets in the Cooling Loop. Perform FILLING THE BATTERY COOLING SYSTEM procedure in accordance with the Service Information. Refer to FILLING - LOW TEMP/BATTERY COOLING SYSTEM . Repair Cooling Loop and retest.
U02AE-00-LOST COMMUNICATIONS WITH HYBRID/EV BATTERY COOLANT PUMP	Repair any LIN Bus communication DTCs and retest. If OK, go to step 2. Check the LIN Bus circuit to the Battery Coolant Pump is not open or shorted to ground. If OK, go to step 3. Load test the B+ feed to the Battery Coolant Pump. Repair if necessary and retest. If OK, go to step 4. Load test the Ground to the Battery Coolant Pump. Repair if necessary and retest. If OK, go to step 5. If all powers and grounds load test OK, replace the Battery Coolant Pump in accordance with the Service Information.
U0623-00-LOST COMMUNICATION WITH COOLANT PUMP "A"	Repair any LIN Bus communication DTCs and retest. If OK, go to step 2. Check the LIN Bus circuit to the Cabin Heater Electric Coolant Pump is not open or shorted to ground. If OK, go to step 3. Load test the B+ feed to the Cabin Heater Electric Coolant Pump. Repair if necessary and retest. If OK, go to step 4. Load test the Ground to the Cabin Heater Electric Coolant Pump. Repair if necessary and retest. If OK, go to step 5. If all powers and grounds load test OK, replace the Cabin Heater Electric Coolant Pump in accordance with the Service Information.
U0646-00-LOST COMMUNICATION WITH MOTOR ELECTRONICS COOLANT PUMP "A"	Repair any LIN Bus communication DTCs and retest. If OK, go to step 2. Check the LIN Bus circuit to the Electric Drive Motor (EDM) Coolant Pump is not open or shorted to ground. If OK, go to step 3. Load test the B+ feed to the Electric Drive Motor (EDM) Coolant Pump. Repair if necessary and retest. If OK, go to step 4. Load test the Ground to the Electric Drive Motor (EDM) Coolant Pump. Repair if necessary and retest. If OK, go to step 5. If all powers and grounds load test OK, replace the Electric Drive Motor (EDM) Coolant Pump in accordance with the Service Information.