Chery Tiggo. Manual — part 189
Diagnostic Trouble Code (DTC) Tests
11 - Oxygen Sensor
DIAGNOSIS & TESTING
LTSMW030016T
03
DIAGNOSIS & TESTING
LTSMW030017T
ECM TERMINAL NO.
ITEM
CONDITION
DATA (DC VOLTAGE)
52
Upstream oxygen sensor
heating
• Warm-up condition
• Idle
0 - 3 V
• Engine is running
• Keep the engine speed
5000 RPM
System voltage
59
Downstream oxygen
sensor
• Engine is running
• Warm-up condition
• Keep the engine speed
2000 RPM
0 - 0.8 V (recycle)
60
Upstream oxygen sensor
• Engine is running
• Warm-up condition
• Keep the engine speed
2000 RPM
0 - 0.8 V (recycle)
76
Sensor (GND)
• Warm-up condition
• Idle
Approximately 0 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
POSSIBLE CAUSE
11
Oxygen sensor
Engine is running
• Fuel quality
• Oxygen sensor
• Harness or connectors
• ECM
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Turn ignition switch off.
• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.
• Turn ignition switch on.
• With the scan tool, record and erase stored DTCs in the ECM.
• Start engine and warm it up to the normal operating temperature.
• Turn ignition switch off and wait at least 10 seconds.
• Start engine and keep the engine speed 2000 RPM for at least 1 minute.
• Let engine idle for 2 minutes and select view DTC.
• If DTC is detected, go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnosis & Testing Diagnostic Help in Sec-
tion 03 Electronic Engine Controls).
NOTE :
Before performing the following procedure, make sure that ECM ground connections are in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03
Diagnostic Procedure
1.
CHECK GROUND CONNECTION.
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect the ground connection B-201 (See Vehicle Wiring Harness Layout - Body Harness in Section 16 Wir-
ing).
• Inspect the ground connection E-208 (See Vehicle Wiring Harness Layout - Engine Control Harness (With MIT-
SUBISHI 2.4L Engine) in Section 16 Wiring).
Are the ground connections OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace the ground connection.
2.
CHECK UPSTREAM O
2
SENSOR ELECTRICAL CONNECTOR
• Disconnect the upstream O
2
sensor (1) electrical
connector.
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace the electrical connector
as necessary.
3.
CHECK DOWNSTREAM O
2
SENSOR ELECTRICAL CONNECTOR
• Disconnect the downstream O
2
sensor (2) electrical
connector.
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace the electrical connector
as necessary.
DIAGNOSIS & TESTING
LTSM030004
VISMD030204
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