TEST
ACTION
APPLICABILITY
2
Start the 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?
All
Yes
→
Go To
3
No
→
Go To
19
3
Start the engine. Allow the engine to 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?
All
Yes
→
Go To
4
No
→
Go To
16
4
Start the engine. Allow the engine to 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?
All
Yes
→
Go To
5
No
→
Go To
13
5
Start the engine. Allow the engine to 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?
All
Yes
→
Go To
6
No
→
Go To
10
6
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 #1 Driver circuit and #2, #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
7
189
DRIVEABILITY - GAS
P0505-IDLE AIR CONTROL MOTOR CIRCUITS —
Continued