TUBE 9N5672 - Caterpillar

Illustration 1 g03150279
Actual gear indicator circuit
The components of the actual gear indicator circuit are the Power Train/Chassis Electronic Control Module (Power Train/Chassis ECM), the Caterpillar Monitoring System and the speedometer/tachometer module.
Illustration 2 g01434290
(1) Power Train/Chassis ECM (front cover removed)
Illustration 3 g01418224
(2) Caterpillar Monitoring System
Illustration 4 g01434332
(3) Speedometer/tachometer module
(4) Actual gear indicator
Illustration 5 g01300407
(5) Shift lever position sensor With the battery disconnect switch in the ON position, 24 V power is supplied from the batteries to circuit breaker 1. Circuit breaker 1 supplies 24 V power to Power Train/Chassis ECM (1).With the key start switch in the ON position, 24 V power is supplied from the batteries to circuit breaker 11 and circuit breaker 13. Circuit breaker 11 supplies 24 V power to Caterpillar Monitoring System (2). Circuit breaker 13 supplies 24 V power to Power Train/Chassis ECM (1) and to the shift lever position sensor.Power Train/Chassis ECM (1) receives a signal from shift lever position sensor (5) for the gear that is currently selected. The signal is sent to Caterpillar Monitoring System (2) via the CAT Data Link to speedometer/tachometer module (3). Speedometer/tachometer module (3) will display the actual gear in the display window. Actual gear indicator (4) displays the gear which is currently selected by Power Train/Chassis ECM (1). Power Train/Chassis ECM (1) will energize the transmission solenoids as required.Reference: For more information on the actual gear indicator system, refer to Systems Operation, Testing and Adjusting, "Caterpillar Monitoring System".