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Home >> Mazda >> 2008 >> B4000 Base, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Troubleshooting (Instrumentation/Driver Information) >> Pinpoint Test 5: The Odometer Is Inoperative >> Normal Operation

Normal Operation

The odometer is controlled by a rolling count signal sent from the powertrain control module (PCM) to the instrument cluster over the high speed controller area network (HS-CAN) bus lines. The instrument cluster interprets the signal sent from the PCM and displays the current mileage on the odometer liquid crystal display (LCD). The instrument cluster sets DTC U0100 in continuous memory if the instrument cluster fails to receive the odometer rolling count data from the PCM and the odometer displays--.

DTC B2143 (NVM Memory Failure) - sets if the instrument cluster detects a nonvolatile memory failure during its self-test sequence.

This pinpoint test is intended to diagnose the following: 

ODOMETER INOPERATIVE PINPOINT TEST 5

PINPOINT TEST 5 THE ODOMETER IS INOPERATIVE
STEP INSPECTION ACTION
1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PCM SELF-TESTS
  • Retrieve the recorded DTCs from the PCM continuous and on-demand self-tests.
  • Are any DTCs retrieved? 
 Yes See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - POWERTRAIN CONTROL MODULE (PCM) .
No Go to next step.
2 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER SELF-TESTS
  • Retrieve the recorded DTCs from the instrument cluster continuous and on-demand self-tests.
  • Is DTC U0100 retrieved? 
 Yes CLEAR the DTCs. CYCLE the key and wait 10 seconds. REPEAT the self-test. If DTC U0100 is retrieved again, go to step 4.
No Go to next step.
3 CHECK THE ODOMETER DISPLAY FOR CORRECT OPERATION
  • Key ON engine OFF (KOEO).
  • Enter the following diagnostic mode on the scan tool:
    • Instrument Cluster DataLogger
  • Select the instrument cluster odometer display segment control active command and monitor the odometer display.
  • Do the odometer display segments illuminate? 
 Yes Go to next step.
No Go to step 5.
4 CHECK FOR CORRECT PCM OPERATION
  • Disconnect the all the PCM connectors.
  • Check for:
    • corrosion
    • damaged pins
    • pushed-out pins
  • Connect all the PCM connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present? 
 Yes INSTALL a new PCM. See POWERTRAIN CONTROL MODULE (PCM) REMOVAL / INSTALLATION . TEST the system for normal operation.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
5 CHECK THE INSTRUMENT CLUSTER FOR CORRECT OPERATION
  • Disconnect all the instrument cluster connectors.
  • Check for:
    • corrosion
    • damaged pins
    • pushed-out pins
  • Connect all the instrument cluster connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present? 
 Yes INSTALL a new instrument cluster. See INSTRUMENT CLUSTER . TEST the system for normal operation
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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