Chery A1 2009 - Page 264

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
Electronic throttle
control actuator
-
12 V or 0 V
65
Electronic throttle
control actuator
66
Electronic throttle
control actuator
12 V or 0 V
67
Electronic throttle
control actuator
73
Regulated sensor
supply 3
Approximately 5 V
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
P1545
Throttle position
control performance
Ignition switch ON
or after engine is
started.
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 the engine and warm it to normal operating temperature.
• With the scan tool, select view DTCs in the ECM.
• If the DTC is detected, the condition is current. Go to Diagnostic Procedure - Step 1.
DIAGNOSIS & TESTING
03
03–157
Chery Automobile Co., Ltd.