175
DTC 522690 Bus Failure
Step Action Value(s) Yes No
1
Did you perform the On-board diagnostics
(OBD) system check?
Go to Step
(2)
Go to On-
Board
Diagnostics
System
Check/
Malfunction
indicator
lamp.
2
Reprogram or replace the ECU as required.
Is the repair completed?
Go to Step
(3)
3
Remove all test equipment except the moni-
tor.
Using the monitor, reset the adaptive learn.
Connect any disconnected components, fus-
es, etc.
Using the monitor, clear DTC information
from the ECM.
Turn the ignition OFF and wait 30 seconds.
Start the engine and operate the vehicle to
full operating temperature.
Observe the MIL.
Observe engine performance and driveabili-
ty.
After operating the engine within the test pa-
rameters of code, check for any stored
codes.
Does the engine operate normally with no stored
codes?
System OK.
Go to On-
Board
Diagnostics
System
Check/
Malfunction
Indicator
lamp.
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