OK:
The readings are almost equal.
NG -- INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)
OK -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY See: Accessories and Optional Equipment/Navigation
System/Service and Repair/Navigation Receiver (for DVD)/Removal
2. INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)
(a) Check the output waveform.
(1) Remove the combination meter assembly with the connector(s) still connected.
(2) Connect an oscilloscope to terminal F15-3 (+S) and body ground.
(3) Turn the engine switch on (IG).
(4) Turn a wheel slowly.
(5) Check the signal waveform according to the condition(s) in the table below.
Text in Illustration
OK:
The waveform is similar to that shown in the illustration.
HINT
When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width
indicated by (A) in the illustration narrows.
NG -- GO TO METER / GAUGE SYSTEM See: Instrument Panel, Gauges and Warning Indicators/Testing and
Inspection/Component Tests and General Diagnostics/Speed Signal Circuit
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR
(a) Disconnect the display and navigation module display connector.
(b) Disconnect the combination meter assembly connector.
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