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Test readings, SRM

Test readings, SRM

The following pages contain directions and readings for testing the control module.

Remember:


• Observe the test criteria. Use common sense when assessing the test results.

• The test readings presented here are with the ignition ON unless stated otherwise.

• Check these points:

- Check first that the control module is receiving power and is grounded.

- Then check all sensor inputs and signals from other systems.

- Finally, check the control module outputs. Remember that the test readings are not a confirmation of whether the actuator is in working order.

• If a test reading is incorrect, use the wiring diagram to locate the leads, connectors or components that need to be checked further.

• Specified test readings are for a calibrated Fluke 88/97.

• Test values show the signal pulse ratio and pulse width respectively. A scan tool with pulse ratio and pulse width measurement respectively must be used.


Note

All units on the I and P buses send signals.


12-pin connector

Number of connection pins 12



Pin Component/function In/out Test criteria Measure across Test reading
1 Instrument bus 1 and B- The test lamp should flash
2 Logic ground
3 High position button 3 and 6 4.5 volt
4 Position button low 4 and 6 4.5 volt
5 +30 5 and 6 B+
6 Ground 5 and 6 B+
7-12 No connection