Electronic Engine Controls - Diagnostic Procedure; Preliminary Inspection; Check Ecm Power Supply Circuit - Chery Tiggo 2009 Service Manual

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.
Does the engine start?
Yes >>
Go to step 7.
No
>>
Go to step 2.
2.

CHECK ECM POWER SUPPLY CIRCUIT - (1)

• Turn ignition switch off and then on.
• Check voltage between the ECM terminal 13 and
ground.
• 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 (IGN)
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
LTSMD030061
31
03–
03