Chery Tiggo. Manual — part 112
6.
CHECK INJECTOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
• Turn ignition switch on.
• Check injector supply voltage between sensor ter-
minal and ground in the electrical connector.
• Battery voltage should exist.
Is the check result normal?
Yes
>>
Go to step 8.
No
>>
Go to the next step.
7.
DETECT MALFUNCTIONING PART
• Check the following:
− Front fuse and relay box F3, A13, G5
− Fuse 12, fuse 24, fuse 27
Without EOBD (1.6L).
− Front fuse and relay box F3, G2, G5
− Fuse 12, Fuse 23, Fuse 24
− harness between injector and fuse
Is the check result normal?
Yes
>>
With the X-431, check the system, If OK, go to the next step.
No
>>
Repair malfunctioning parts.
8.
CHECK INJECTOR CONTROL CIRCUITS FOR A SHORT
• Check injector control circuit voltage.
• 3.6 V should exist.
Is the check result normal?
Yes
>>
Go to step 10.
No
>>
Go to the next step.
DIAGNOSIS & TESTING
LTSMD030024
03
9.
DETECT MALFUNCTIONING PART
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
• Continuity should not exist.
INJECTOR NO.
INJECTOR
TERMINAL
GROUND
1
2
Ground
2
2
3
2
4
2
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Repair or replace the circuit for a short in harness or connectors.
10.
CHECK INJECTOR RESISTANCE
• Check the fuel injector resistance as shown in the following:
INJECTOR
NO.
INJECTOR
TERMINAL
RESISTANCE
(APPROXIMATELY)
⍀ (20°C)
1
1 & 2
12
2
1 & 2
3
1 & 2
4
1 & 2
• Check sensor signal output.
• Connect ECM connector.
• Connect injector connectors.
• Check the fuel injector voltage as shown in the following:
TERMINAL NO.
ITEM
CONDITION
DATA (AVERAGE DC
VOLTAGE)
6
Injector 2
• Engine is running
• Warm-up condition
• Idle
• Accelerate suddenly
Voltage: 11 - 14 V
7
Injector 3
27
Injector 1
47
Injector 4
DIAGNOSIS & TESTING
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace injector.
11.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is DTC P0261, P0264, P0267 or P0270 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
03
P0262 - Cylinder 1 Injector Circuit High
P0265 - Cylinder 2 Injector Circuit High
P0268 - Cylinder 3 Injector Circuit High
P0271 - Cylinder 4 Injector Circuit High
Injector Circuit High
DIAGNOSIS & TESTING
LTSMW030048T
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