Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL
NO.
ITEM CONDITION
DATA
(DC VOLTAGE)
17 Sensor (GND)
Ignition switch: ON
- Approximately 0 V
33
Regulated sensor
supply 1
- Approximately 5 V
37
Manifold Absolute
Pressure (MAP)
sensor
Engine running: Idle Approximately 1.3 V
Engine running:
2000 RPM
Approximately 1.5 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSE
P0107
Manifold Absolute
Pressure or
Barometric Pressure
low input
Ignition switch ON
or after engine is
started
Signal output is
below minimum
acceptable range for
a few seconds
continuously.
• MAP sensor
• Harness or
connectors
• ECM
P0108
Manifold Absolute
Pressure or
Barometric Pressure
high input
Signal output is
above maximum
acceptable range for
a few seconds
continuously.
• MAP sensor
• Harness or
connectors
• 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.
• 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.
DIAGNOSIS & TESTING
03
03–53
Chery Automobile Co., Ltd.
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