Chery Tiggo. Manual — part 104
12.
CHECK INJECTOR RESISTANCE
• Disconnect injector harness connectors (See Fuel Pressure Test in Section 04 - Fuel Delivery).
• Check the resistance of the injectors.
INJECTOR
NO.
INJECTOR
TERMINAL
RESISTANCE
(APPROXIMATELY)
⍀ (20°C)
1
1 & 2
16
2
1 & 2
3
1 & 2
4
1 & 2
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace injector.
Go to step 14.
13.
CHECK INJECTOR
WARNING!
Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
• Remove fuel delivery rail with injectors (See Fuel Injector Rail Removal & Installation 1.6L & 1.8L & 2.0L in
Section 04 Fuel Delivery).
NOTE :
Be careful not to drop the fuel injectors when removing the fuel delivery rail.
• Keep fuel hose and all injectors connected to injector rail.
• Disconnect all ignition coil harness connectors.
• Prepare pans or saucers under each injector.
• Observe the fuel injectors and crank engine for about 3 seconds.
• Fuel should be sprayed evenly by each injector.
Is the check result normal?
Yes
>>
Go to next step.
No
>>
Clean any injector that sprays unevenly or replace any injector that does not spray fuel.
DIAGNOSIS & TESTING
03
14.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• See DTC ⬙Confirmation Procedure⬙.
Is DTC P0171 still present?
Yes
>>
Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>
The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
P0172 - Fuel Trim System Too Rich
DIAGNOSIS & TESTING
LTSMW030052T
03
DIAGNOSIS & TESTING
LTSMW030058T
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