Dodge ZB 2005 Service Manual page 1286

Symptom:
P1494-LEAK DETECTION PUMP SWITCH OR MECHANICAL
FAULT
When Monitored and Set Condition:
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.
GOOD TRIP EQUAL TO ZERO
LDP VACUUM SUPPLY
LEAK DETECTION PUMP
(K107) LDP SWITCH SENSE CIRCUIT OPEN
(K107) LDP SWITCH SENSE CIRCUIT SHORTED TO GROUND
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
No
2 Turn the ignition off.
Disconnect the vacuum supply hose at the Leak Detection Pump.
Connect a vacuum gauge to the disconnected vacuum supply hose at the Leak
Detection Pump.
Start the engine and read the vacuum gauge.
Does the vacuum gauge read at least 13 Hg?
Yes → Go To 3
→ Repair leak or obstruction in vacuum hose as necessary.
No
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 6.
Perform POWERTRAIN VERIFICATION TEST VER - 6.
DRIVEABILITY - GAS
165
APPLICABILITY
All
All