Chrysler PT Cruiser 2001 Service Manual Supplement page 2642

DRIVEABILITY - GAS
Symptom:
P1494-LEAK DETECT PUMP SW OR MECHANICAL FAULT
When Monitored and Set Condition:
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 and fuel level between 15% and 85%.
Set Condition: The state of the switch does not change when the solenoid is energized.
WIRING HARNESS INTERMITTENT
LDP SWITCH SENSE CIRCUIT OPEN
LDP SWITCH SENSE CIRCUIT SHORTED TO GROUND
LDP VACUUM SUPPLY
LEAK DETECTION PUMP
POWERTRAIN CONTROL MODULE
TEST
1 Turn the ignition on.
With the DRBIII , read DTC's.
Is the DTC Specific Good Trip Counter displayed and equal to zero for P-1494?
Yes → Go To 2
→ Go To 7
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 in/Hg?
Yes → Go To 3
→ Repair leak or obstruction in vacuum hose as necessary.
No
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
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APPLICABILITY
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