Chrysler PT Cruiser 2001 Service Manual Supplement page 2599

P0505-IDLE AIR CONTROL MOTOR CIRCUITS —
TEST
7 Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the Powertrain Control Module harness connectors.
Note: Check connectors - Clean/repair as necessary.
Note: The following steps are checking for a short between the IAC Driver
Circuits.
Measure the resistance between the IAC #2 Driver circuit and #3, #4 Driver circuits.
Is the resistance below 5.0 ohms on any of the Drivers?
Yes → Repair the IAC Driver Circuits shorted together.
→ Go To 8
No
8 Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the Powertrain Control Module harness connectors.
Note: Check connectors - Clean/repair as necessary.
Note: The following steps are checking for a short between the Driver
Circuits.
Measure the resistance between the IAC #3 Driver circuit and the #4 Driver circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the IAC Driver Circuits shorted together.
→ Go To 9
No
9 If there are no possible causes remaining, view repair.
Repair
10 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 #4 Driver circuit from the IAC Motor connector to
the PCM connector.
Is the resistance below 5.0 ohms?
Yes → Go To 11
→ Repair the IAC #4 Driver circuit for an open.
No
11 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 between ground and the IAC #4 Driver circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the IAC #4 Driver circuit for a short to ground.
→ Go To 12
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace the Idle Air Control Motor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
Continued
139
APPLICABILITY
All
All
All
All
All