Daewoo MATIZ Service Manual page 281

DTC P0400 – Electric Exhaust Gas Recirculation Out of Limit
Step
Perform an Euro On-Board Diagnostic (EOBD)
System Check.
1
Is the system check complete?
1. Turn the ignition switch to with the engine OFF.
2. Install the scan tool.
3. Command the electric exhaust gas recirculation
2
(EEGR) valve to the specified values.
Does the Actual EEGR Position follow the desired
EEGR position?
1. Turn the ignition switch to ON.
2. Disconnect the EEGR valve electrical connector.
3
3. With a test light connected to B+, probe the
ground circuit to the EEGR valve.
Does the test light illuminate?
1. Connect the test light to ground.
2. Probe the EEGR control circuit at terminal 1 to
the EEGR valve.
4
3. Command the EEGR valve to the specified
values using a scan tool.
After the command is raised, does the test light glow
brighter, flash or maintain a steady glow?
Repair the open or poor connection in the EEGR
ground circuit.
5
Is the repair complete?
With a test light still connected to ground, probe the
signal circuit at terminal 1.
6
Does the test light illuminate?
With a test light still connected to ground, again
probe the signal circuit without commanding the
7
EEGR valve with the scan tool.
Does the test light illuminate?
Check the signal circuit for a short to voltage and
repair as necessary.
8
Is a repair necessary?
With a digital voltmeter (DVM) connected to ground,
probe the 5V reference circuit at terminal 3.
9
Is the voltage measured near the specified value?
Check the control circuit for a short to battery
voltage and repair as necessary.
10
Is a repair necessary?
Connect the test light to B+ and again probe the
control circuit at terminal 4.
11
Does the test light illuminate?
Replace the engine control module (ECM).
12
Is the replacement complete?
Check the EEGR ground circuit for a poor
connection or proper terminal tension at the ECM
13
and repair as necessary.
Is a repair necessary?
DAEWOO M-150 BL2
Action
ENGINE CONTROLS 1F – 183
Value(s) Yes
–
Go to Step 2
25%, 50%,
75%, 100% Go to Step 19
–
Go to Step 4
25%, 50%,
75%, 100% Go to Step 6
–
Go to Step 19
–
Go to Step 8
–
Go to Step 10
–
Go to Step 19
5V Go to Step 13
–
Go to Step 19
–
Go to Step 15
–
Go to Step 19
–
Go to Step 19
No
Go to
"On-Board
Diagnostic
System Check"
Go to Step 3
Go to Step 5
Go to Step 7
–
Go to Step 9
Go to Step 11
Go to Step 12
Go to Step 14
Go to Step 12
Go to Step 16
–
Go to Step 17