Chery A1 2009 Service Manual page 136

Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL NO.
3
51
53
61
80
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.
• Start the engine and warm it to normal operating temperature.
• With the scan tool, select view data stream.
• If the data stream is not detected, the condition is current. Go to Diagnostic Procedure - Step 1.
• If the data stream is detected, the condition is intermittent (See Diagnostic Help and Intermittent DTC Trouble-
shooting 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.
Diagnostic Procedure
1.
PRELIMINARY INSPECTION
• Attempt to start the engine.
Is engine running?
Yes >>
Go to step 8.
No >>
Go to step 2.
2.
CHECK ECM POWER SUPPLY CIRCUIT - (1)
• Access the ECM electrical connector (do not dis-
connect the connector).
• Turn ignition switch off and then on.
• Check the voltage between ECM terminal 13 and
ground, harness side.
• Battery voltage should exist.
Is the check result normal?
Yes >>
Go to step 4.
No >>
Go to step 3.
Chery Automobile Co., Ltd.
DIAGNOSIS & TESTING
ITEM
GND (Ignition)
GND (Signal)
GND (Signal)
GND (Power)
GND (Power)
CONDITION
Ignition switch: ON
Ignition switch: ON
Ignition switch: ON
Ignition switch: ON
Ignition switch: ON
DATA (DC VOLTAGE)
Approximately 0 V
Approximately 0 V
Approximately 0 V
Approximately 0 V
Approximately 0 V
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