DESCRIPTION
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU.
The skid control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of these pulse signals.
MONITOR DESCRIPTION
The ECM assumes that the vehicle is being driven when the transmission counter gear indicates more than 300 rpm and over 30 seconds have passed since the park / neutral position switch was turned OFF.
If thre is no signal from the vehicle speed sensor with these conditions satisfied, the ECM concludes that the vehicle speed sensor is malfunctioning. The ECM will turn on the MIL and a DTC will be set.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1 CHECK SPEEDOMETER
(a) Drive the vehicle and check whether the operation of the speedometer in the combination meter is normal.
HINT:
2 READ VALUE OF INTELLIGENT TESTER (VEHICLE SPEED)
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / VEHICLE SPD.
(e) Drive the vehicle.
(f) Read the value displayed on the tester.
OK: Vehicle speeds displayed on tester and speedometer display are equal.
3 CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE)
(a) Disconnect the C10 combination meter connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage between the terminal of the combination meter and body ground.
Standard voltage
(d) Reconnect the combination meter connector.
4 CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)
(a) Shift the transmission gear selector lever to the neutral position.
(b) Jack up the vehicle.
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage between the terminal of the combination meter and body ground while the wheel is turned slowly.
Standard voltage
HINT:
The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly.
5 CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)
(a) Disconnect the C10 combination meter connector.
(b) Disconnect the E5 ECM connector.
(c) Measure the resistance.
Standard resistance (Check for open)
Standard resistance (Check for short)
(d) Reconnect the combination meter connector.
(e) Reconnect the ECM connector.
REPLACE ECM (See page ES-498)
AVC-LAN Circuit
DESCRIPTION
Each unit of the audio system connected to the AVC-LAN (communication bus)
transfers the signal of
each switch by communication.
When a short to +B or short to ground occurs in this AVC-LAN, the audio system
will not function normally
as the communication is discontinued.
INSP ...
Open in Stop Light Switch Circuit
DTC C1249/49 Open in Stop Light Switch Circuit
DESCRIPTION
This skid control ECU inputs the stop light switch signal and detects the
status of brake operation.
The skid control ECU has an open detection circuit. If an open in the stop light
switch input line or GND
side stop light circuit ...
The keys
The following keys are provided with the vehicle.
Vehicles without a smart key system
Master keys (black)
Valet key (gray)
Key number plate
Vehicles with a smart key system
Electronic keys
Operating the smart key system
Operating the wireless remote
contr ...