Speedometer/Odometer

The solid state logic of the speedometer and odometer is powered from the GAUGES Fuse 4 through the CKT 39 (PNK) wire to the instrument cluster. The speedometer/odometer receives a square wave 4000 PPM (Pulses Per Mile) pulse from the Vehicle Control Module (VCM) through the CKT 389 (DK GRN) wire. The solid state electronics positions the speedometer pointer in response to the pulse rate. The electronics also drives the odometer indication in response to the pulse rate over time.

The rated accuracy of the speedometer at 105 kmh (65 mph) is 101-108 kmh (63-67 mph). At 32 kmh (20 mph), the rated accuracy is 26-39 kmh (16-24 mph). Error in the speedometer/odometer may be caused by the following conditions:
^ Variations in voltage
^ Inaccuracies in other circuit components