NG -- CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR)
OK -- Continue to next step.
7. INSPECT COMBINATION METER ASSEMBLY
(a) Remove the combination meter See: Instrument Panel, Gauges and Warning Indicators/Instrument Cluster / Carrier/Service and
Repair/Removal and Replacement/Combination Meter/Removal.
(b) Reconnect the F15 connector to the combination meter assembly.
(c) Reconnect the F8 connector to the power management control ECU.
(d) Connect an oscilloscope to terminal F15-3 (+S) and body ground.
(e) Turn the engine switch on (IG).
(f) Turn the wheel slowly.
(g) Check the signal waveform according to the condition(s) in the table below.
OK:
The waveform is displayed as shown in the illustration.
Text in 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 (Speed Signal Circuit) See: Instrument Panel, Gauges and Warning
Indicators/Testing and Inspection/Component Tests and General Diagnostics/Speed Signal Circuit
OK -- REPLACE POWER MANAGEMENT CONTROL ECU See: Power and Ground Distribution/Power Distribution
Module/Service and Repair/Removal
8. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR)
(a) Disconnect the F93 connector.
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