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 -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
- 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