Daewoo CIELO EURO III Manual page 330

1F – 161 ENGINE CONTROLS
DTC P1133 - Oxygen Sensor (O2S 1) Too Few Transitions (Cont'd)
Step
Check the exhaust manifold for a leak near the en-
gine and repair as necessary.
5
Is a leak found and repaired?
1. Turn the ignition OFF.
2. Disconnect the O2S 1 electrical connector.
3. Jumper the O2S 1 low circuit, terminal 1 to
ground.
6
4. Turn the ignition ON, with the engine OFF.
5. Using a scan tool, monitor the O2S 1 voltage.
Does the scan tool voltage indicate the O2S 1 volt-
age within the specified value?
1. Jumper the O2S 1 signal and low circuits,
terminal 1 and 2 to ground.
7 2. Using a scan tool, monitor the O2S 1 voltage.
Does the scan tool voltage indicate the voltage be-
low the specified value?
1. Turn the ignition OFF.
2. Replace the O2S 1.
Notice: Before replacing the sensor, the cause of
the contamination must be determined and cor-
rected in order to prevent further damage to the sen-
sor. Check for the following:
8
Fuel contamination.
Use of improper Room Temperature Vulcanizing
(RTV) sealant.
Engine oil/coolant consumption.
Is the repair complete?
Repair the condition as necessary.
9
Is the repair complete?
Repair the O2S 1 sensor signal circuit for a short to
ground.
10
Is the repair complete?
1. Remove the jumper wire.
2. Using a Digital Voltmeter (DVM) measure the
voltage between the O2S 1 signal circuit, terminal
11
2 and ground.
Does the O2S 1 voltage measure above the speci-
fied value?
1. Turn the ignition OFF.
2. Disconnect the
engine control module (ECM) connectors
and check the O2S 1 low circuit, at terminal
M12 for continuity.
12
3. If the O2S 1 low circuit measures over the
specified value, repair the open or poor
connection as necessary.
Is an O2S 1 low circuit problem found and cor-
rected?
Action Value Yes
–
Go to Step 3
400-500 mV Go to Step 7
200 mV Go to Step 8
–
Go to Step 15
– Go to Step 15
–
Go to Step 15
407 mv Go to Step 12
5 : Go to Step 15
No
Go to Step 6
Go to Step 10
Go to Step 11
–
–
–
Go to Step 13
Go to Step 14
DAEWOO T-154 BL2,3