Pinpoint Test R : Insufficient Heat In Auto Start-Stop Mode Only: Notes
WARNING: This page is about a different car, the 2017 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
Refer to AUTO-START-STOP SYSTEM for schematic and connector information.
Normal Operation and Fault Conditions
Cabin Heater Coolant Pump - vehicles equipped with Auto Start-Stop, REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P2600 | Coolant Pump "A" Control Circuit/Open | This DTC sets when the PCM senses an open on the cabin heater coolant pump circuits. |
| P2601 | Coolant Pump "A" Control Circuit Performance/Stuck Off | This DTC sets when the PCM senses any of the following conditions: Dry-Run leads to cabin heater coolant pump running without resistance Over Temperature Over/Under Voltage Impeller Stall Impeller Speed below minimum speed Internal Error |
| P2602 | Coolant Pump "A" Control Circuit Low | This DTC sets when the PCM senses low voltage on the PWM circuit when commanding it high, indicating a short to ground to the cabin heater coolant pump. |
| P2603 | Coolant Pump "A" Control Circuit High | This DTC sets when the PCM senses low voltage on the PWM circuit when commanding it high, indicating an open circuit to the cabin heater coolant pump. |
Possible Causes
- Wiring, terminals or connectors
- Low coolant or air in the coolant system
- Cabin heater coolant pump
- PCM