Chery Tiggo 5 (T21). Service manual — part 130
08–
9
08
DIAGNOSIS & TESTING
Problem Symptoms Table
HINT:
Use the table below to help determine the cause of problem symptoms. Check each suspected area in
sequence. Repair or replace the faulty components, or adjust as necessary.
Symptom
Suspected Area
See page
Fuel pressure in fuel supply system is too
low
Fuel filter assembly (blocked)
Electric fuel pump assembly (strainer
blocked)
Fuel pressure in fuel supply system is too
high
Fuel injector (clogged)
Electric fuel pump assembly
Electric fuel pump assembly has loud
operating noise and operates delay
Low fuel level
-
Electric fuel pump assembly relay
-
Electric fuel pump assembly
Injector is clogged and leaks
Fuel filter assembly (blocked)
Fuel injector
Poor fuel quality
-
Excessive foreign matter in fuel tank
-
Injector does not work
Fuel supply system line (broken)
-
Fuel injector (short in coil)
Electric fuel pump assembly (damaged)
Wire harness
-
08–
10
08
Fuel System Pressure Release
Perform the following procedures to release fuel pressure in fuel supply system:
1. Recognize and remove electric fuel pump assembly relay from engine compartment fuse and relay box.
2. Start and run engine until it stalls.
3. Restart engine until it does not run.
4. Turn ignition switch to LOCK.
5. Disconnect the negative battery cable.
6. Insert the electric fuel pump assembly relay into the original place.
WARNING
When engine is not operating, fuel pressure in fuel supply system is still high. Before repairing or
disconnecting fuel line or fuel supply system components, it is necessary to release the fuel supply
system pressure to prevent fuel from spraying out accidentally. Failure to follow these instructions may
result in serious personal injury or death.
RT21080030
Fuse
puller
EF20 10A
EF19 10A
EF18 15A
EF15 15A
EF10 10A
EF08 15A
EF07 15A
EF05 15A
EF04 20A
EF03 20A
EF02 20A
EF01 20A
EF17 10A
EF16
EF14
EF13
EF12
EF11
EF09
EF06
EF40 10A
EF39 10A
EF387.5A
EF35 15A
EF34 20A
EF30 10A
EF29 10A
EF28 10A
EF27 10A
EF26 10A
EF25 15A
EF37 10A
EF36 10A
EF33
EF32
EF31
EF24
EF23
EF22
EF21
Fuel relay
ACC relay
Cooling fan relay
Blower relay
TCU relay
(CVT model)
Main relay
ING1 relay
Start relay
IGN2 relay
Backup light
A/C
compressor
Horn relay
relay
(CVT model)
Front fog
Low beam
light relay
relay
High beam
relay
ERL Y08
ERL Y13
ERL Y16
ERL Y15
ERL Y14
EF48
20A
25A
20A
20A
30A
EF47
EF46
EF45
EF44
EF43
EF42
EF41
ERL Y09
ERL Y10
ERL Y11
ERL Y12
ERL Y07
ERL Y06
ERL Y05
ERL Y04
ERL Y03
ERL Y02
ERL Y01
08–
11
08
Fuel Supply System Pressure Test
Fuel Pressure Specifications
1. Release fuel system pressure (
).
2. Remove the engine trim cover assembly (
).
3. Disconnect the inlet hose connector and connect the fuel
supply system pressure tester to a position between inlet
hose and fuel rail.
4. Start engine and run it at idle, and then read the value on pressure tester.
Start engine and read the value while idling:
- Standard pressure at idle should be higher than 400 kPa.
- If measured pressure value is lower than 400 kPa, check fuel filter assembly for blockage.
Replace fuel filter assembly if necessary (
- If measured pressure value is lower than 400 kPa and fuel filter assembly operates properly, check
electric fuel pump assembly. Replace as necessary.
- If measured pressure value is too high, it indicates that injector may be clogged or electric fuel pump
assembly pressure modulating valve may be malfunctioning.
Replace injector (
) or electric fuel pump assembly (
) if necessary.
SQR484F
Pressure (kPa)
Fuel Pressure on Fuel Rail - Key (ON)
400
Fuel Pressure on Fuel Rail - Engine Idling
400
Fuel Pressure on Fuel Rail - Key (LOCK)
400
WARNING
When operating fuel supply system, work area should be in good ventilation and keep fire sources or
open flames away from the work area, in which the fire extinguisher should be equipped.
Before operating fuel supply system, please touch vehicle body to discharge static electricity; failure to
do so will cause a fire, even result in an explosion.
Before removing and installing fuel pipes, release fuel supply system pressure.
CAUTION
Make sure battery voltage is 11 - 12 V.
Service life of fuel filter assembly should be within 30,000 km.
Make sure fuel supply system lines are securely connected, preventing fuel supply system from leaking.
Fuel Hose
RT21080040
08–
12
08
ON-VEHICLE SERVICE
Fuel Filter Assembly
Removal
Disconnection way for all fuel pipe coupling joints in
following procedures is shown in the illustration.
1. Release fuel pressure in fuel supply system (
).
2. Turn off all the electrical equipment and ignition switch.
3. Disconnect the negative battery cable.
4. Raise the vehicle to a proper height.
WARNING
Before operating fuel supply system, please touch vehicle body to discharge static electricity; failure to
do so will cause a fire, even result in an explosion.
When operating fuel supply system, work area should be in good ventilation and keep fire sources or
open flames away from the work area, in which the fire extinguisher should be equipped.
After performing procedures for fuel system pressure release, there still remains some pressure in fuel
line. When disconnecting fuel line, cover the joint with a piece of cloth or equivalent to prevent fuel from
spraying out.
If fuel leakage occurs when operating fuel supply system, please handle the leaked fuel in time.
CAUTION
DO NOT damage disconnected fuel system line or connectors. Cover line joints or connectors with
plastic bags or equivalent, preventing foreign matter from entering.
Be sure to wear necessary safety equipment when repairing to prevent accidents.
Try to prevent body paint surface from being scratched during removal and installation.
RT21080050
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