DTC U0623-87: Lost Communication With Coolant Pump "A" - Missing message: Action
- Refer to the electrical circuit diagrams and check the electric coolant pump power and ground circuits for open circuit, high resistance. Repair the wiring harness as necessary
- Refer to the electrical circuit diagrams and check the electric coolant pump control circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
- Install a new electric coolant pump