Daewoo CIELO EURO III Manual page 338

1F – 169 ENGINE CONTROLS
DTC P1134 - Oxygen Sensor (O2S 1) Transition Ratio (Cont'd)
Step
1. With the O2S 1 disconnected, jumper the signal
and low circuits, terminals 2 and 1 to ground.
2. Turn the ignition ON
6
3. Using a scan tool, monitor the O2S 1 voltage.
Does the scan tool indicate less than 10 mv and
immediately return to about 450 mv when the jumper
is removed?
Repair condition as necessary.
7
Is the action complete?
Check for faulty ECM connections or terminal
damage.
8
Is the action complete?
Repair open, short, or grounded signal circuit.
9
Is the action complete?
Remove the O2S 1 and examine it for signs of:
Fuel contamination.
Improper Room Temperature Vulcanizing (RTV)
10
sealant (white powdery coating on sensor).
Engine oil/coolant consumption.
Are signs of contamination observed?
1. Turn the ignition OFF.
11 2. Replace the ECM.
Is the repair complete?
1. Turn the ignition switch OFF.
12 2. Replace the O2S 1.
Is the action complete?
Determine and correct the cause of contamination
before replacing the O2S 1.
13
Is the action 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
diagnosed?
Action Value Yes
–
Go to Step 10
– Go to Step 14
–
Go to Step 14
– Go to Step 14
–
Go To Step 13
–
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 11
–
Go to Step 9
Go To Step 11
Go To Step 12
Go To Step 12
–
–
Go to Step 2
System OK
DAEWOO T-154 BL2,3