Chery Tiggo. Manual — part 160
Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL
NO.
ITEM
CONDITION
DATA (DC
VOLTAGE)
32
Regulated sensor
supply 2
Ignition switch: ON
-
Approximately 5 V
38
Electronic throttle
control actuator
(Position sensor)
• Engine stopped
• Accelerator pedal:
Fully released
4.24 V
• Engine stopped
• Accelerator pedal:
Fully depressed
0.72 V
54
Electronic throttle
control actuator
• Engine stopped
• Accelerator pedal:
Fully released
0.74 V
• Engine stopped
• Accelerator pedal:
Fully depressed
4.62 V
64
Motor 4
-
12 V or 0 V
65
Motor 3
66
Motor 2
0 V or 12 V
67
Motor 1
78
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
P0221
Throttle position
sensor B
performance
• Ignition switch:
ON
• Engine: Running
Rationally incorrect
voltage is sent to
ECM compared with
the signals from
TPS1 and TPS2.
• Electronic throttle
control actuator
(TPS1 and TPS2)
• Harness or
connectors
• Accelerator pedal
position sensor 2
• 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.
• If DTC is detected, go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnosis & Testing Diagnostic Help in Sec-
tion 03 Electronic Engine Controls).
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03
Diagnostic Procedure
1.
CHECK GROUND CONNECTIONS
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine
Room Harness (With 2.0L Engine) in Section 16 Wiring).
Are the ground connections OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace ground harness or connections.
2.
CHECK TPS ELECTRICAL CONNECTOR
• Disconnect the TPS electrical connector (1).
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace the electrical connector
as necessary.
DIAGNOSIS & TESTING
VISMD030203
3.
CHECK THE TPS POWER SUPPLY CIRCUIT
• Turn ignition switch on.
• Check supply voltage between TPS terminal 3 and
ground in the TPS electrical connector E-027.
• Approximately 5.0 V should exist.
Is the check result normal?
Yes
>>
Go to step 8.
No
>>
Go to the next step.
4.
CHECK THE TPS POWER SUPPLY CIRCUIT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between TPS terminal 3 and ECM terminal 32.
• Continuity should exist.
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Repair or replace circuit for an open.
5.
CHECK THE TPS AND THE ACCELERATOR PEDAL POSITION (APP) SENSOR POWER SUPPLY CIRCUIT
• Check harness for short to power and short to ground between following terminals.
ECM TERMINAL
TPS TERMINAL
32
TPS terminal 3
32
APP sensor terminal 3
33
APP sensor terminal 6
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Repair circuit for short to ground or short to power in harness or connectors.
DIAGNOSIS & TESTING
LTSMD030035
03
6.
CHECK APP SENSOR
• Connect all harness connectors disconnected.
• Turn ignition switch on.
• Check voltage between ECM terminals 16 (APP sensor 1 signal), 40 (APP sensor 2 signal) and ground under
the following conditions:
ECM
TERMINAL
NO.
APP
SENSOR
TERMINAL
ITEM
CONDITION
DATA (DC
VOLTAGE)
16
APP
sensor
terminal 4
Accelerator
pedal
position
sensor 1
Ignition
switch on
• Engine
stopped
•
Accelerator
pedal:
Fully
released
0.72 -
0.74 V
• Engine
stopped
•
Accelerator
pedal:
Fully
depressed
3.95 V
40
APP
sensor
terminal 1
Accelerator
pedal
position
sensor 2
• Engine
stopped
•
Accelerator
pedal:
Fully
released
0.36 -
0.37 V
• Engine
stopped
•
Accelerator
pedal:
Fully
depressed
1.97 V
Is the check result normal?
Yes
>>
Go to step 10.
No
>>
Replace the Accelerator Pedal Assembly (See Accelerator Pedal Position Sensor Removal & Installation
in Section 03 Electronic Engine Controls).
7.
CHECK THE TPS SIGNAL CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between TPS terminal 5 and ECM terminal 38.
• Continuity should exist.
• Also 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.
DIAGNOSIS & TESTING
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