Daewoo CIELO EURO III Manual page 452

1F – 282 ENGINE CONTROLS
DTC P1391 – G Sensor Rough Road Rationality (Cont'd)
Step
1. Check the 5 volt reference circuit, terminal
K50 for high resistance, an open between
the ECM and the G sensor, or a poor
7
connection at the ECM.
2. If a problem is found, repair as necessary.
Is a problem found?
1. Turn the ignition OFF.
2. Disconnect the ECM and check the G
sensor signal circuit for high resistance, an open,
a short to ground, or a short to the sensor ground
8
circuit.
3. If a problem is found, repair as necessary.
Is a problem found?
1. Check the G sensor signal circuit for a poor
connection at the ECM.
9
2. If a problem is found, repair as necessary.
Is a problem found.
1. Check for a poor connection at the G sensor.
10 2. If a problem is found, repair as necessary.
Is a problem found?
1. Turn the ignition OFF.
11
2. Replace the G sensor.
Is the repair complete?
1. Turn the ignition OFF.
2. Disconnect the ECM.
3. Turn the ignition ON.
12
4. Check the G sensor signal circuit for a short to
voltage or a short to the 5 volt reference circuit.
5. If a problem is found, repair as necessary.
Is a problem found?
1. Turn the ignition OFF.
13
2. Replace the ECM
Is the repair complete?
1. Using the scan tool, clear the DTCs.
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the conditions for
14
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic ran
and passed?
Check if any additional DTCs are set.
15
Are any DTCs displayed that have not been diag-
nosed?
Action Value Yes
–
Go to Step 14
–
Go to Step 14
–
Go to Step 14
–
Go to Step 14
–
Go to Step 14
–
Go to Step 14
–
Go to Step 14
–
Go to Step 15
– Go to applicable
DTC table
No
Go to Step 8
Go to Step 9
Go to Step 13
Go to Step 11
–
Go to Step 13
–
Go to Step 2
System OK
DAEWOO T-154 BL2,3