OPERATOR'S MANUAL MAINTENANCE

Section C - Electrics
C-165 C-165
9803/9880-3
Service Procedure
Testing of ECU Inputs + Outputs
TC-014_2
Remove panel behind drivers seat, for access to the ECU
A.
C030670-C1
Fig 1.
Care should be taken when testing the inputs + outputs of
the ECU to ensure that correct test method is used to
determine if the ECU is functioning normally.
Note: Inputs/outputs should be checked with engine
running or in solenoid override mode, refer to Section C,
EMS Set+Mode (20 sec) Menu.
Testing Low Side Input
With the switch open the meter will read 0v.
With the switch closed the meter will read 24-28v.
C005840GB
Fig 2.
Testing High Side Input
With the switch open the meter will read 0v.
With the switch closed the meter will read 24-28v.
C005850GB
Fig 3.
A
ECU
Input
Red lead
Switch (rocker, momentary,
pressure, level, etc.)
Black lead
V
ECU
Input
Red lead
Switch (lights, engine preheat,
etc.)
Black lead
V