Chrysler PT Cruiser 2001 Service Manual Supplement page 2598

DRIVEABILITY - GAS
P0505-IDLE AIR CONTROL MOTOR CIRCUITS —
TEST
2 Start engine and let idle.
Disconnect the IAC Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage of the IAC #1 Driver Circuit.
Was the voltage over 5.0 volts at any time?
Yes → Go To 3
→ Go To 19
No
3 Start engine and let idle.
Disconnect the IAC Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage of the IAC #2 Driver circuit.
Was the voltage over 5.0 volts at any time?
Yes → Go To 4
→ Go To 16
No
4 Start engine and let idle.
Disconnect the IAC Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage of the IAC #3 Driver circuit.
Was the voltage over 5.0 volts at any time?
Yes → Go To 5
→ Go To 13
No
5 Start engine and let idle.
Disconnect the IAC Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the voltage of the IAC #4 Driver circuit.
Was the voltage over 5.0 volts at any time?
Yes → Go To 6
→ Go To 10
No
6 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 #1 Driver circuit and #2, #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 7
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
138
APPLICABILITY
All
All
All
All
All