B0570

CIRCUIT DESCRIPTION
The instrument cluster receives a vehicle speed input from the vehicle speed sensor (VSS) over the class 2 line from the PCM. This signal is used in order to drive the speedometer and the odometer of the instrument cluster. The season odometer displays the total accumulated kilometers (miles) of the vehicle and stores the value permanently in the electronically erasable programmable read only memory (EEPROM) of the instrument cluster. The trip odometer displays the accumulated kilometers (miles) to the tenths of a kilometer (mile) since the last reset and stores the value in the keep alive memory (KAM) of the instrument cluster.

CONDITIONS FOR SETTING THE DTC
The instrument cluster continuously performs an internal test on the operation of the speedometer and the odometer in order to detect an internal fault in the speedometer and/or the odometer.

ACTION TAKEN WHEN THE DTC SETS
^ The instrument cluster stores DTC B0570 in memory.
^ The odometer displays the word Error.

CONDITIONS FOR CLEARING THE DTC
^ The DTC becomes history when the ignition is cycled.
^ A history DTC clears after 100 drive cycles when the condition for this DTC is no longer present.
^ The IPC receives the clear code command from the scan tool.

DIAGNOSTIC AIDS
Use the Freeze Frame and/or Failure Records data in order to locate an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data may aid in determining the number of miles since the DTC set. The Fail Counter and Pass Counter can also aid in determining the number of ignition cycles that the diagnostic reported a pass and/or fail. Operate the vehicle within the same freeze frame conditions, i.e. RPM, load, vehicle speed, temperature, etc. This will isolate when the DTC failed.

Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.

TEST

Steps 1-4: