ENGINE CONTROLS 1F–43
DAEWOO M-150 BL2
Idle Air Control System Check
Step Action Value(s) Yes No
1
Perform an Euro On-Board Diagnostic (EOBD)
system check.
Was the check performed?
–
Go to Step 2
Go to “Euro
On-Board
Diagnostic
System Check”
2
1. Turn the ignition OFF.
2. Remove Idle Air Control (IAC) valve.
3. Inspect the IAC passages for restrictions.
Is the problem found?
–
Go to Step 3 Go to Step 4
3
Clean the IAC passages.
Is the repair complete?
–
System OK
–
4
Measure the resistance between following terminals
of IAC valve.
D Terminal A and B
D Terminal C and D
Does the resistance equal to the value specified? 40–80 Ω Go to Step 6 Go to Step 5
5
Replace the IAC valve.
Is the repair complete?
–
System OK
–
6
1. Disconnect the Engine control Module (ECM)
connector.
2. Check for an open or short in the wires between
following terminals.
D Terminal A of IAC valve connector and terminal
70 of ECM connector
D Terminal B of IAC valve connector and terminal
71 of ECM connector
D Terminal C of IAC valve connector and terminal
42 of ECM connector
D Terminal D of IAC valve connector and terminal
72 of ECM connector
Is the problem found?
–
Go to Step 8 Go to Step 7
7
Repair an open or short circuit as needed.
Is the repair complete?
–
System OK
–
8
Inspect the IAC connector terminals and the ECM
connector terminals.
Is the problem found?
–
Go to Step 9 Go to Step 10
9
Repair or replace the throttle body assembly and/or
ECM connector terminals as needed.
Is the repair complete?
–
System OK
–
10
Replace the ECM.
Is the repair complete?
–
System OK
–
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