Chery B11. Manual — part 73
Chery Automobile Maintenance Manual
15
2. Diagnostic Troubleshooting
Error Code NO.14 Throttle Position (TPS)
Sensor System
Possible Reasons
Check Area
l
Ignition switch: ON
l
Ignition switch ON last 60 seconds or engine start on
Setup Condition
l
Engine idle speed position is ON and sensor output
voltage is above 2V for more than 4 seconds.
l
Output voltage of the sensor lasts 4 seconds below 0.2V.
l
Throttle position sensor is in failure or malfunction
l
Contactor contact defect of throttle position sensor circuit,
broken circuit or short circuit of sensor
l
Abnormal “ON” status at idle speed position switch
l
The signal cable of idle speed position is short.
l
Engine ECU failure
At MUT
I “DATA LIST” NO.26 idle speed position switch
system
Normal: when throttle is on the idle speed position: ON;
throttle is partial open:OFF
Normal
Check throttle position sensor
Abnormal
Replace
Normal
Check harness joint of throttle position sensor
l
Remove harness joint
l
Voltage between 1# terminal and ground (Ignition switch is ON)
Normal Status
4.8
5.2V
l
Conductivity between 4# terminal and ground
Normal Status
Conductible
Normal
Check output circuit of throttle position sensor according to check program
39.
Abnormal
Check harness D zone
connector
Normal
Abnormal
Repair
Check failure
Abnormal
Check connector between
throttle position sensor
and ECU
Normal
Replace engine ECU
Abnormal
Repair
1
2
3
4
Throttle position sensor connector
Abnormal
Check idle speed switch
system according to check
program 28.
Chery Automobile Maintenance Manual
16
III. Intake Air Temperature
Sensor
Intake air temperature sensor is integrated with
vortices airflow meter.
1.Type—Negative temperature coefficient
thermo resistance
2.Structure Feature--A thermo resistance
which is installed on the upper of AFS swirl
pole back, will turn the detected inlet
temperature into voltage and then transfer
electric signal to ECU. The input signal will be
calculated to adjust injection drive time.
Intake air temperature sensor Check
1
Remove harness joint on airflow sensor.
2
Measure resistance value between 5# and
6# terminal on airflow sensor.
Standard value:
2.3-3.0K
(at 20
)
0.30-0.42K
(at 80
)
(3)Use motor blower to heat intake air
temperature sensor and measure the resistance
value again.
Normal status: temperature increase and
resistance value decrease.
(4)If resistance value is different from standard
value or resistance value keep unchanged,
please replace airflow sensor assembly.
7
6
5
4
3
2
1
Sensor Plug
Chery Automobile Maintenance Manual
17
Diagnostic Troubleshooting
Error Code No.13 Intake Air Temperature Sensor System
Possible Reasons
Check
l
Ignition switch
ON
l
Ignition switch ON last 60 seconds or engine start on
Setup Condition
l
Output voltage of the sensor lasts 4 seconds above 4.6V
(equals to inlet air temperature is below -45
).
l
Output voltage of the sensor lasts 4 seconds below 0.2V
(equals to inlet air temperature is below 125
).
l
Throttle position sensor failure
l
Joint contact defect of intake air temperature sensor
harness, broken circuit or short circuit of sensor
l
Engine ECU failure
Check intake temperature sensor
Abnorm
al
Replac
Check airflow sensor connector
l
Pull out airflow sensor connector and check wiring.
l
Voltage between 6# terminal and ground (Ignition switch:
ON)
Normal status
4.5-4.9V
l
Conductivity between 5# terminal and ground
Normal status: Conductible
Normal
Normal
Check inlet temperature sensor connector
Normal
Check failure
Abnormal
Replace engine ECU
Abnormal
Check ECU D zone
connector
Abnorma
l
Repair
Normal
Check failure
Abnorma
l
Check wiring between
engine ECU and inlet
temperature sensor
Normal
Abnorma
l
Repair
Replace engine ECU
Chery Automobile Maintenance Manual
18
IV. Barometric Pressure
Sensor
Barometric pressure sensor is integrated with
vortices airflow meter.
1.Type--Semiconductor pressure strain
2.Principle--Absolute pressure is measured
through the pressure difference between swirl
pole and then turned into voltage signal, which
is output to ECU for the drive time calculation
of fuel injection.
Diagnostic Troubleshooting
Error Code No.25
Barometric Pressure
Sensor System
Possible Reasons
Check condition
l
Ignition switch
ON
l
Ignition switch ON last 60 seconds or engine start on
l
Battery voltage is below 8V
Setup Condition
l
Output voltage of the sensor lasts 4 seconds above 4.5V
(equals to b
arometric pressure
is below 114 KPa) or
l
Output voltage of the sensor lasts 4 seconds below 0.2V
(equals to b
arometric pressure
is below 5.33 KPa).
l
Barometric pressure s
ensor failure
l
Harness joint contact defect, broken circuit or short circuit
of sensor
l
Engine ECU failure
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