Dtc P1404 Exhaust Gas Recirculation (Egr) Closed - Daewoo CIELO EURO III Manual

1F – 310 ENGINE CONTROLS
small amount of material may cause a DTC
P0401 to set.
12. Check the terminals for being backed out, improper-
ly formed or damaged, and for poor tension.
13. Clearing DTCs is a very important step for this diag-
nostic. The clearing function allows the EGR valve
to relearn a new pintle position as the old pintle posi-
tion was inaccurate due to the failure that caused

DTC P1404 Exhaust Gas Recirculation (EGR) Closed

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. Install a scan tool.
3. Command the Exhaust Gas Recirculation (EGR)
2
valve to the specified values.
Does the Actual EGR Position follow the Desired
EGR Position?
Disconnect the EGR valve electrical connector.
3
Is the Actual EGR Position near the specified value?
Check the signal circuit terminal C for a short to
voltage and repair as necessary.
4
Is a repair necessary?
With a Digital Voltmeter (DVM) connected to ground,
probe the 5 volt reference circuit terminal D to
5
the EGR valve.
Does the DVM read near the specified value?
1. Turn the ignition switch OFF.
2. Replace the
6
engine control module (ECM).
Is the action complete?
1. Connect a test light to ground.
2. Probe the EGR control circuit to the EGR valve
7
harness connector.
Does the test light illuminate?
Check the 5 volt reference circuit for a short to
8 voltage and repair as necessary.
Is a repair necessary?
Check the control circuit for a short to voltage and
9 repair as necessary.
Is a repair necessary?
Check the EGR sensor ground circuit for an open or
poor connection at the EGR valve electrical
10
connector and repair as necessary.
Is a repair necessary.
1. Turn the ignition switch OFF.
11
2. Replace the EGR valve.
Is the action complete?
Action
the DTC. The DTC must be cleared with the ignition
ON, engine OFF or when the engine is idling. If the
ECM sees a EGR command, the new pintle
will not be learned.
14. If no malfunctions have been found at this point and
no additional DTCs were set, refer to "Diagnostic
Aids" in this section for additional checks and infor-
mation.
Value
–
Go to Step 2
25%, 50%,
Go to Step 13
75%, 100%
100% Go to Step 4
–
Go to Step 13
5 v Go to Step 7
–
Go to Step 13
–
Go to Step 9
–
Go to Step 13
–
Go to Step 13
–
Go to Step 13
–
Go to Step 13
Yes No
Go to "On-
Board Diag-
nostic System
Check"
Go to Step 3
Go to Step 5
Go to Step 6
Go to Step 8
–
Go to Step 10
Go to Step 6
Go to Step 6
Go to Step 12
–
DAEWOO T-154 BL2,3