1. CHECK VEHICLE SENSOR (OPERATION CHECK)
(a) Enter the "Vehicle Sensors" screen. Refer to Check GPS & Vehicle Sensor in Operation Check See: Accessories and Optional
Equipment/Navigation System/Testing and Inspection/Initial Inspection and Diagnostic Overview/Navigation System (for
HDD)/Operation Check.
(b) While driving the vehicle, compare the "Speed" indicator to the reading on the speedometer. Check if these readings are almost equal.
HINT
The meter ECU receives the vehicle speed signal from the skid control ECU via CAN communication. Therefore, perform the
following inspection referring to values on the Data List of the skid control ECU because it is the source of the vehicle speed
signal.
OK:
Vehicle speed displayed on the "Vehicle Sensors" screen is almost the same as the actual vehicle speed measured using the
Techstream See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Scan Tool
Testing and Procedures/Data List / Active Test.
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 HDD)/Removal
2. INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)
(a) Check the output waveform.
(1) Reconnect the F15 combination meter assembly connector.
(2) Remove the combination meter assembly with the connector(s) still connected.
(3) Connect an oscilloscope to terminal F15-3 (+S) and body ground.
(4) Turn the engine switch on (IG).
(5) Turn a wheel slowly.
(6) Check the signal waveform according to the condition(s) in the table below.
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