P1494

Test 1 - 2:

Test 3 - 6:

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 -12 °C (10 °F) of battery/ambient.

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

POSSIBLE CAUSES
- Good trip equal to zero
- LDP vacuum supply
- Leak detection pump
- (K107) LDP switch sense circuit shorted to ground
- (K107) LDP switch sense circuit open
- PCM