Posted on by

ISB/ISBe Series Engines – 019-331   Switched Road Speed Governor Limit Switch

General Information

 TOC

The switched road speed governor limit switch allows the driver to switch to an alternate road speed setting. This value can be programmed using INSITE™.

SMALL | MEDIUM | LARGE

Resistance Check

 TOC

If INSITE™ is available, monitor the switched road speed governor limit switch for proper operation. If

not, follow the troubleshooting procedures in this section.

Locate the switched road speed governor switch.

Remove and tag the two connectors from the terminals on the switch. Touch the multimeter probes to the terminals on the switch.

SMALL | MEDIUM | LARGE
   


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 has failed. Replace the switch.

Refer to the OEM repair manual for the replacement instructions.

SMALL | MEDIUM | LARGE
   


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 has failed. Replace the switch.

Refer to the OEM repair manual for the replacement instructions.

If the resistance value is correct, the switch

must still be checked for a short circuit to ground.

SMALL | MEDIUM | LARGE
   

Check for Short Circuit to Ground

 TOC

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 has failed. Replace the switch. Refer to the OEM repair manual for replacement procedures.

SMALL | MEDIUM | LARGE
Last Modified:  12-Mar-2003
Avatar photo

Published by Jack

Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.