Equator 2WD V6-4.0L (2009)
Powertrain Management > Computers and Control Systems > Information Bus > Component Information > Testing and Inspection > Initial Inspection and Diagnostic Overview > Page 1819
DETECT THE ROOT CAUSE
Identify the root cause using the created diagnosis sheet.
Identifying the root cause
Draw a line on the diagnosis sheet to indicate the possible cause. Narrow the search.
Color-code when drawing lines.
Do not draw a line onto a existing line.
Drawing a line is not necessary if the circuit is shorted. Refer to "Present Error - Short Circuit -", "Past Error - Short Circuit -".
Refer to the following for details of the trouble diagnosis procedure.
"Present Error - Open Circuit -"
"Present Error - Short Circuit -"
"Past Error - Open Circuit -"
"Past Error - Short Circuit -"
NOTE: When the root cause appears to be a branch line or short circuit, be sure to check the control unit as well as the communication line.
Present Error - Open Circuit -
Identify the error circuit using information from the "Bus check" ("ECU list" included).
1. ECU list: Check the items indicated in "ECU list". Draw a line on the diagnosis sheet to indicate the error circuit.
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