P1494

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P1494-LEAK DETECTION PUMP SWITCH OR MECHANICAL FAULT

WHEN MONITORED
Immediately after a cold start, with battery/ambient temperature between 40 deg. F and 90 deg. F and coolant temperature within 10 deg. 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 signal circuit open
- (K107) LDP switch signal circuit shorted to ground
- PCM