Engine Electrical System

Diagnostic trouble code: P0601 “Malfunction of non-programmed check code in
electronic control unit”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
1
Connect the diagnostic tester and adaptor
and turn the ignition switch to “ON”
position.
Proceed to next
step
Yes
Proceed to next
step 2
Clear the diagnostic trouble code and
reconfirm that this malfunction is a steady
state malfunction.
No Normal operation
3 Replace ECU. End
Diagnostic trouble code: P0602 “Malfunction of non-programmed diagnostic
trouble code in electronic control unit”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
1
Connect the diagnostic tester and adaptor
and turn the ignition switch to “ON”
position.
Proceed to next
step
Yes
Proceed to next
step 2
Clear the diagnostic trouble code and
reconfirm that this malfunction is a steady
state malfunction.
No Normal operation
3 Replace ECU. End
E-57
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