CM2150 Electronic Control System – 019-255   Two-Speed Axle Switch

The 2-speed axle switch allows the operator the capability of switching from one axle to another. The ECM can then calculate the vehicle speed correctly.

If INSITE™ electronic service tool is available, monitor the 2-speed axle switch for proper operation. If
not, follow the troubleshooting procedures in this section.

Locate the 2-speed axle switch.

Remove and tag the two connectors from the terminals on the switch.

Touch the multimeter probes to the terminals on the switch.

Move the switch to the OFF position, and measure the resistance.

The multimeter
must show an open circuit (100k ohms or more).

If the circuit is
not open, the switch is damaged and
must be replaced.

Refer to the OEM troubleshooting and repair manual for the replacement instructions.

Move the switch to the ON position, and measure the resistance.

The multimeter
must show a closed circuit (10 ohms or less).

If the circuit is
not closed, the switch is damaged and
must be replaced.

Refer to the OEM troubleshooting and repair manual for the replacement instructions.

If the resistance value is correct, the switch
must still be checked for a short circuit to ground.

Touch one of the multimeter probes to one of the switch terminals. Touch the other probe to chassis ground.

Move the switch to the ON position, and measure the resistance.

The multimeter
must show an open circuit (100k ohms or more).

If the circuit is
not open, the switch is damaged and
must be replaced.

Refer to the OEM repair manual for replacement procedures.