No Fuse Indicator

The no fuse indicator is serviced as a unit with the odometer vacuum fluorescent display unit in the instrument cluster.

The no fuse indicator gives an indication to the vehicle operator when the Ignition off draw fuse is ineffective or is not installed. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received over the controller area network data bus from the totally integrated power module.

The no fuse indicator function of the odometer VFD unit is completely controlled by the instrument cluster logic circuit, and that logic will only allow this indicator to operate when the instrument cluster receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the odometer VFD no fuse indication will always be OFF when the ignition switch is in any position except ON or START. The instrument cluster will turn ON the no fuse indicator for the following reasons:

• >>No Fuse Indicator Lamp-On Message<< - Each time the ignition switch is turned to the ON position and the cluster does not receive battery voltage from the IOD fuse, a no fuse lamp ON indicator will be illuminated. The indicator remains illuminated for about 3 seconds, until the IOD fuse is installed, until the trip odometer reset switch button is depressed or until the ignition switch is turned to the OFF position, whichever occurs first.

The TIPM continually monitors the IOD circuit to determine the status of the IOD fuse. The TIPM then sends the proper lamp ON or lamp OFF message to the electromechanical instrument cluster.

A diagnostic scan tool is required for proper diagnosis of the no fuse indicator, the TIPM, the EMIC, the CAN data bus or the electronic communication related to no fuse indicator operation. Refer to the appropriate diagnostic information.