Reference Values Between Ecm Terminals/Ground; On Board Diagnostic Logic; Dtc Confirmation Procedure - Chery Tiggo 2009 Service Manual

Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL
NO.
32
33
16
40
35
36
73

On Board Diagnostic Logic

• Self-diagnosis detection logic.
DTC NO.
P2138

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 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 :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
212
03–
DIAGNOSIS & TESTING
ITEM
Regulated sensor
supply 2
Regulated sensor
supply 1
Accelerator Pedal
Position Sensor 1
(APPS1)
Ignition switch: ON
Accelerator Pedal
Position Sensor 2
(APPS2)
Sensor (GND)
Sensor (GND)
Regulated sensor
supply 1
DTC DEFINITION
Accelerator pedal
Ignition switch on or
position sensor
performance
CONDITION
• Engine stopped
• Accelerator pedal:
Fully released
• Engine stopped
• Accelerator pedal:
Fully depressed
• Engine stopped
• Accelerator pedal:
Fully released
• Engine stopped
• Accelerator pedal:
Fully depressed
DTC DETECTION
CONDITION
Rationally incorrect
voltage is sent to
ECM compared with
after engine start
the signals from
APPS1 and APPS2.
VOLTAGE)
- Approximately 5 V
- Approximately 5 V
0.72 - 0.74 V
0.36 - 0.37 V
- Approximately 0 V
- Approximately 0 V
- Approximately 5 V
DTC SET
POSSIBLE CAUSE
CONDITION
• Accelerator pedal
position sensor 1
and 2
• Harness or
connectors
• Electronic throttle
control actuator
(TPS1 and TPS2)
• ECM
Chery Automobile Co., Ltd.
DATA (DC
3.95 V
1.97 V