P1494

Tests 1 - 2:

Tests 3 - 7:

SYMPTOM
P1494-LEAK DETECT PUMP SW OR MECHANICAL FAULT

WHEN MONITORED
Immediately after a cold start, with battery/ambient temperature between 4 °C (40 °F) and 32 °C (90 °F) and coolant temperature within -6.6 °C (20 °F) of battery/ambient.

SET CONDITION
The state of the switch does not change when the solenoid is energized.

POSSIBLE CAUSES
- LDP Vacuum Supply
- Wiring Harness Intermittent
- Leak Detection Pump
- LDP Switch Sense Circuit Shorted To Ground
- LDP Switch Sense Circuit Open
- Powertrain Control Module