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Home >> Jeep >> 2004 >> Wrangler Rubicon, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Diagnostic Procedures >> Diagnostic Information And Procedures >> Instrument Cluster >> Symptom: *SPEEDOMETER INACCURATE OR INOPERATIVE >> Diagnostic Procedure

Diagnostic Procedure

SPEEDOMETER INACCURATE OR INOPERATIVE - DIAGNOSTIC PROCEDURE

TEST ACTION APPLICABILITY
1 With the DRBIII®, read DTCs.
Are any Powertrain DTCs present?
  1. Yes : Refer to DRIVEABILITY -- GAS for the related symptom(s).
  2. No : Go To 2
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2 With the DRBIII®, ensure that the Instrument Cluster is correctly configured for Tire Size, Axle Type, and Transfer Case Type.
Are the Instrument Cluster configurations correct?
  1. Yes : Go To 3
  2. No : Using the DRBIII®, select Miscellaneous, Configure Cluster for the correct Tire Size, Axle Type, and Transfer Case Type. With the DRBIII®, erase DTCs.
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3 Turn the ignition off.
Perform the Instrument Cluster self test.
Press and hold the Trip Reset button.
Turn the ignition on.
Observe the Speedometer during the self test.
NOTE: The self test can also be initiated using the DRBIII®.

The Speedometer should pause at the following calibration points:
Cal Point 1: 20 MPH (40km/h Canada/BUX) (40 MPH Aus/Japan)
Cal Point 2: 55 MPH (80 km/h Canada/BUX) (80 MPH Aus/Japan)
Cal Point 3: 75 MPH (120 km/h Canada/BUX) (120 MPH Aus/Japan)
Did the Speedometer pause at the correct calibration points?
  1. Yes : The condition is not present at this time. Monitor DRBIII® parameters while wiggling the related wire harness. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wiring harness and connector terminals.
  2. No : Replace and configure the Instrument Cluster in accordance with the Service Information.
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