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Test readings, STC control module

Test readings, STC control module

Keep in mind:


Note the test conditions and use common sense when assessing the test result.

Check first that the control module is receiving power and is grounded. Then check all the sensor inputs and signals from other systems. Finally, check the control module outputs. Remember that test values will not indicate whether the actuator is working.

If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.

The indicated values refer to calibrated Fluke 88/97.

The test readings show the signal pulse ratio and pulse width respectively. A test instrument with pulse ratio or pulse width measurement must be used.


Pin Component/function In/Out Test conditions Across Test reading See
A1 I-BUS In/Out
A2
A3
A4 Position sensor, first bow ready to lock In
A5
A6 Microswitch, roll-over bar, left In 6-B-
A7
A8
A9
A10 Microswitch, roll-over bar, right In 10-B-
A11
A12 Sensor supply, group 1 Out 12-B-
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26 +30 In 26-B- B+
A27 Ground Out 27-B+ B+


Pin Component/function In/Out Test conditions Across Test reading See
B1 Position sensor, sixth bow up In
B2 Position sensor, locked soft-top cover, right In
B3
B4 Position sensor, open soft top cover In
B5
B6 Position sensor, main cylinder, soft top lowered In
B7 Position sensor, locked soft-top cover, left In
B8 Position sensor, sixth bow locked, left In
B9 Solenoid valve 1, soft top Out Solenoid valve active
B10 Solenoid valve 2, soft top Out Solenoid valve active
B11 Solenoid valve 3, soft top Out Solenoid valve active
B12
B13 Position sensor, sixth bow locked, right In
B14 Position sensor, soft top storage In
B15
B16
B17
B18
B19
B20
B21 Position sensor, first bow locked In
B22
B23 Position sensor, main cylinder, soft top raised In
B24 Sensor supply, group 2 Out (B+)
B25 Solenoid valve, ground In
B26 Hydraulic pump motor, convertible, right In/Out
B27 Hydraulic pump motor, convertible, left In/Out