Chery Tiggo. Manual — part 193
4.
CHECK IAT SENSOR GROUND CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
A/T SENSOR
TERMINAL
ECM
TERMINAL
CONTINUITY
5
76
Yes
• Continuity should exist.
• 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 to power or short to ground in harness or connectors.
5.
CHECK IAT SENSOR
• Check resistance between MAF sensor terminal 5 and 6 under the following conditions:
IAT°C
RESISTANCE K
⍀
20°C
2.3 - 3.0
80°C
0.30 - 0.42
• Connect IAT sensor connector.
• Connect ECM connector.
• Turn ignition switch on.
• Check sensor signal output.
TERMINAL NO.
ITEM
CONDITION
DATA (DC
VOLTAGE)
56
IAT sensor
Ignition switch: ON
IAT: 0°C
3.2 - 3.8 V
IAT: 20°C
2.3 - 2.9 V
IAT: 40°C
1.5 - 2.1 V
IAT: 80°C
0.4 - 1.0 V
76
Sensor (GND)
Ignition switch: ON
0 V
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace IAT sensor.
DIAGNOSIS & TESTING
03
6.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is DTC 13 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
14 - Throttle Position Sensor
DIAGNOSIS & TESTING
LTSMW030014T
03
Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL
NO.
ITEM
CONDITION
DATA (DC
VOLTAGE)
65
Regulated sensor
supply
Ignition switch: ON
-
Approximately 5 V
68
Throttle Position
(TP) sensor
TP is in idle position
0.3 - 1.0 V
TP is full opening
4.5 - 5.5 V
71
Idle position switch
Adjust TP to idle
position
0 - 1 V
TP is ajar
Above 4 V
76
Sensor (GND)
-
Approximately 0 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSE
14
Throttle position
sensor
Ignition switch on for
60 seconds or after
engine start
• Idle position
switch is in ON
position and output
is over 2 V for 4
seconds
continuously.
• Signal output is
below 0.2 V for 4
seconds
continuously.
• Throttle Position
Sensor (TPS) or
misalignment
• Harness or
connectors
• Idle position switch
ON position is not
normal
• Idle position switch
signal circuit shorted
• 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 and data stream.
• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-
bleshooting in Section 03 Electronic Engine Controls for more information.
NOTE :
Before performing the following procedure, make sure that the ECM connection is in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
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