Pinpoint Test E : P26BD: Notes
WARNING: This page is about a different variant/trim than selected.
Refer to Electronic Engine Controls - 1.6L GTDI for schematic and connector information.
Normal operation and Fault Conditions
The engine cooling system incorporates a coolant bypass solenoid valve and a coolant shutoff solenoid valve. Using these two valves, the coolant flow through the engine block can be restricted or completely stagnated. The restriction or stagnation of the coolant flow makes it possible for the engine components to warm up faster during the warm-up phase. Both solenoid valves are controlled by the PCM via a low side driver. The PCM monitors both solenoids for electrical faults and sets an appropriate DTC.
Possible Sources
- Fuse(s)
- Wiring, terminals or connectors
- Coolant shutoff solenoid valve
- PCM
Diagnostic Trouble Code (DTC) Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P26BD | Engine Coolant Bypass Valve "D" Control Circuit/Open | The PCM monitors the Engine Coolant Bypass Valve "D" Control Circuit/Open circuit for high and low voltage. The test fails if the voltage exceeds a calibrated limit for a calibrated amount of time. |