The skid control ECU converts wheel speed sensor signals into 4-pulse signals and sends them to the combination meter. After this signal is
converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the
power management control ECU. The power management control ECU determines the vehicle speed based on the frequency of these pulse signals.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When the power management control ECU is replaced with a new one and the cable from the negative (-) battery terminal is
connected, the power source mode becomes the on (IG) mode. When the battery is removed and reinstalled, the power source
mode that was selected when the battery was removed is restored.
PROCEDURE
1. CHECK CAN COMMUNICATION SYSTEM See: B2282
NG -- GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) See: Diagnostic Trouble
Code Descriptions/CAN Communication System
OK -- Continue to next step.
2. CHECK SPEEDOMETER OPERATION See: B2282
NG -- GO TO METER / GAUGE SYSTEM (Speedometer Malfunction) See: Instrument Panel, Gauges and Warning
Indicators/Testing and Inspection/Symptom Related Diagnostic Procedures/Speedometer Malfunction/From 08/2009
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) See: B2271
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See: B2271
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY
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