Chrysler PT Cruiser 2001 Service Manual Supplement page 2645

P1495-LEAK DETECTION PUMP SOLENOID CIRCUIT —
TEST
3 Turn the ignition off.
Disconnect the Leak Detection Pump electrical connector.
Connect a 12 volt test light to a good 12 volt source (B+).
Turn the ignition on.
With the DRBIII , actuate the Leak Detection Pump.
Check the LDP Solenoid Control circuit, with the test light, while the Leak Detection
Pump is actuating.
Does the test light blink?
Yes → Go To 4
→ Go To 6
No
4 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 5
→ Repair leak or obstruction in vacuum hose as necessary.
No
5 Turn the ignition off.
Disconnect the Leak Detection Pump electrical connector.
Turn the ignition on.
With the DRBIII in Inputs/Outputs, read the Leak Detect Pump Sw state.
While observing the Leak Detect Pump Sw state, connect a jumper wire between a
good 12 volt source (B+) and the LDP Switch Sense circuit.
Did the Leak Detect Pump Sw state change when the jumper was connected?
Yes → Replace the Leak Detection Pump.
→ Test Complete.
No
6 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 7
→ Repair leak or obstruction in vacuum hose as necessary.
No
7 Turn the ignition off.
Disconnect the Leak Detection Pump electrical connector.
Turn the ignition on.
With the DRBIII in Inputs/Outputs, read the Leak Detect Pump Sw state.
While observing the Leak Detect Pump Sw state, connect a jumper wire between a
good 12 volt source (B+) and the LDP Switch Sense circuit.
Did the Leak Detect Pump Sw state change when the jumper was connected?
Yes → Replace the Leak Detection Pump.
→ Go To 8
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 6.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 6.
DRIVEABILITY - GAS
185
Continued
APPLICABILITY
All
All
All
All
All