Chery Tiggo. Manual — part 201
2.
CHECK KNOCK SENSOR ELECTRICAL CONNECTOR
• Disconnect the knock sensor electrical connector
E-066 (1).
• 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 THE KNOCK SENSOR GROUND CIRCUIT
• Check continuity between knock sensor terminal 1 and ground.
• Continuity should exist.
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Repair or replace the knock sensor ground circuit.
4.
CHECK KNOCK SENSOR SIGNAL CIRCUIT
• Disconnect ECM harness connector.
• Check harness continuity between sensor connector E-066, terminal 1 and ground, sensor terminal 2 and ECM
terminal 62.
CHECK SENSOR CIRCUIT
ECM TERMINAL
KNOCK SENSOR TERMINAL
62
2
• Also check harness for short to power and short to ground.
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Repair circuit for an open or short in harness or connectors.
DIAGNOSIS & TESTING
LTSM030011
03
5.
CHECK KNOCK SENSOR SIGNAL
• Connect knock sensor (1) connector.
• Set multimeter to voltage range.
• Check knock sensor (1) output signal as table
shown.
CHECK OUTPUT SIGNAL
KNOCK SENSOR TERMINAL NO.
TEST METHOD
DATA (AVERAGE DC VOLTAGE)
1 & 2
• Test Method 1: Knock at cylinder
with rubber hammer.
Output signal voltage should exist.
• Test Method 2: Knock at sensor
slightly.
• Output signal voltage should exist.
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace knock sensor.
6.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is DTC 31 still present?
Yes
>>
Replace the ECM.
No
>>
The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
LTSM030011
41 - Injector
DIAGNOSIS & TESTING
LTSMW030008T
03
Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL NO.
ITEM
CONDITION
DATA (DC VOLTAGE)
1
Injector 1
• Engine is running
• Warm-up condition
• Accelerate suddenly
Voltage: 11 - 14 V
2
Injector 3
14
Injector 2
15
Injector 4
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
POSSIBLE CAUSE
41
Injector
Engine is running
• Injector
• 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 to normal operating temperature then 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 the ECM ground connection is in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
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 E-208 (See Vehicle Wiring Harness Layout - Engine Room Harness (With Mit-
subishi 2.4L Engine) in Section 16 Wiring).
Is the ground connections OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace ground connection.
DIAGNOSIS & TESTING
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