Chrysler PT Cruiser 2001 Service Manual Supplement page 2601

P0505-IDLE AIR CONTROL MOTOR CIRCUITS —
TEST
17 Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the Powertrain Control Module harness connectors.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the IAC #2 Driver circuit from the IAC Motor connector to
the PCM connector.
Is the resistance below 5.0 ohms?
Yes → Go To 18
No
18 If there are no possible causes remaining, replace the Powertrain Control Module.
If there are no possible causes remaining, view repair.
Repair
19 Turn the ignition off.
Disconnect IAC Motor harness connector.
Disconnect the Powertrain Control Module harness connectors.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the IAC #1 Driver circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the IAC #1 Driver Circuit for a short to ground.
No
20 Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the Powertrain Control Module harness connectors.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the IAC #1 Driver circuit from the IAC Motor connector to
the PCM connector.
Is the resistance below 5.0 ohms?
Yes → Go To 21
No
21 If there are no possible causes remaining, replace the Powertrain Control Module.
If there are no possible causes remaining, view repair.
Repair
ACTION
→ Repair the IAC #2 Driver circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Go To 20
→ Repair the IAC #1 Driver circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
Continued
141
APPLICABILITY
All
All
All
All
All