Dtc P0506 Idle Speed Rpm Lower Than Desired Idle Speed - Daewoo CIELO EURO III Manual

1F – 334 ENGINE CONTROLS

DTC P0506 Idle Speed RPM Lower Than Desired Idle Speed

Step
Perform an On-Board Diagnostic (EOBD) System
Check.
1
Is the system check complete?
1. Turn the ignition switch ON with the engine OFF.
2. Engine at normal operating temperature.
3. Transmission in park or neutral and the parking
brake set.
4. A/C is Off.
2
5. Install a scan tool and command the Idle Air
Control (IAC) valve up and down between the
specified values.
Does the engine rpm change smoothly when com-
manded by the scan tool?
1. Turn the ignition switch OFF.
2. Disconnect the IAC valve electrical connector.
3. Measure the resistance across the IAC valve
terminals A and B.
3
4. Measure the resistance across the IAC terminals
C and D.
Is the resistance across terminals A and B and ter-
minals C and D within the specified value?
1. Measure the resistance across the IAC valve
terminals B and C.
2. Measure the resistance across the IAC terminals
4
A and D.
Is the resistance across terminals B and C and ter-
minals A and D infinite?
1. Turn the Ignition switch ON with the engine OFF.
2. Disconnect the IAC valve electrical connector.
5
3. With a test light connected to ground, probe the
IAC electrical connector terminals.
Does the test light illuminate on 2 terminals.
With a test light connected to B+, probe the IAC
electrical connector terminals.
6
Does the test light illuminate on 2 terminals?
Check for an open or short to ground in the IAC
7 valve high and low circuits and repair as necessary.
Is a repair necessary?
1. Idle the engine.
2. Connect a test light to ground, probe the IAC
electrical connector terminals.
8
Does the test light flash ON and OFF for all
terminals?
Check for an open or a short to voltage in the IAC
9 valve high and low circuits and repair as necessary.
Is a repair necessary?
Check the engine
control module (ECM) electrical connector for poor
10
connections and repair as necessary.
Is a repair necessary?
Action Value Yes
–
Go to Step 2
900-
2000 rpm Go to Step 3
40-80 : Go to Step 4
–
Go to Step 15
–
Go to Step 6
–
Go to Step 8
–
Go to Step 15
–
Go to Step 11
–
Go to Step 15
–
Go to Step 15
No
Go to
"On-Board
Diagnostic
System Check"
Go to Step 5
Go to Step 13
Go to Step 13
Go to Step 7
Go to Step 9
Go to Step 10
Go to Step 12
Go to Step 10
Go to Step 14
DAEWOO T-154 BL2,3