TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the PCM harness connector(s).
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?
All
Yes
→
Repair the IAC Driver Circuits shorted together.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Go To
8
8
Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the PCM harness connector(s).
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 #4 Driver circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the IAC Driver Circuits shorted together.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Go To
9
9
If there are no possible causes remaining, view repair.
All
Repair
Replace the Idle Air Control Motor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
10
Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the PCM harness connector(s).
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the IAC #4 Driver Circuit from the IAC Motor harness
connector to the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
11
No
→
Repair the open IAC Driver Circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
11
Turn the ignition off.
Disconnect the IAC Motor harness connector.
Disconnect the PCM harness connector(s).
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between IAC Driver #3 and ground (B-).
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the IAC #4 Driver Circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Go To
12
141
DRIVEABILITY - GAS
P0505-IDLE AIR CONTROL MOTOR CIRCUITS —
Continued