DESCRIPTION
The meter CPU receives vehicle speed signals from the skid control ECU via the CAN communication system (CAN V1 Bus). The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU supplies power to the vehicle speed sensor. The skid control ECU detects vehicle speed signals based on the pulses of the voltage.
HINT:
for Vacuum Booster type: (See page )
for Hydraulic Booster type: (See page )
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
If the vehicle speed is outside the allowable range when tested, perform the on-vehicle inspection (See page ).
HINT:
Before starting the following inspection, check tire size and tire air pressure.
PROCEDURE
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if a CAN communication DTC is output (See page ).
Result
Result |
Proceed to |
---|---|
CAN communication DTC is not output |
A |
CAN communication DTC is output |
B |
B |
GO TO CAN COMMUNICATION SYSTEM |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (SPEED METER OPERATION) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(e) According to the display on the Techstream, perform the Active Test.
Combination Meter
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Speed Meter Operation |
Speedometer |
|
Operate with IG ON and the vehicle is stopped. |
There is a deviation in the values displayed on the speedometer (Control range → Speedometer display) Reference mph*2:
Reference km/h*3:
|
OK:
Speedometer indication is normal.
NG |
REPLACE COMBINATION METER ASSEMBLY |
|
3. |
READ VALUE USING TECHSTREAM (VEHICLE SPEED METER) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) According to the display on the Techstream, read the Data List.
Combination Meter
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Vehicle Speed Meter |
Vehicle speed/ Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) |
Approximately same as actual vehicle speed (When vehicle is being driven) |
- |
OK:
Vehicle speed displayed on the Techstream is almost the same as the speedometer indication.
NG |
REPLACE COMBINATION METER ASSEMBLY |
|
4. |
CHECK VEHICLE STABILITY CONTROL SYSTEM |
(a) Check if a vehicle stability control DTC is output.
Result |
Proceed to |
---|---|
Vehicle stability control DTC is not output |
A |
Vehicle stability control (for Vacuum Booster type) DTC is output |
B |
Vehicle stability control (for Hydraulic Booster type) DTC is output |
C |
A |
REPLACE COMBINATION METER ASSEMBLY |
B |
GO TO VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Booster type) |
C |
GO TO VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Booster type) |
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
2.
CUSTOMER PROBLEM ANALYSIS CHECK
HINT:
In troubleshooti ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Master Cylinder Pressure Sensor Zero Point High Malfunction (C1422,C1456)
DESCRIPTION
Refer to DTCs C1421, C1423, C1424, C1455, C1457 and C1458 (See page
).
DTC Code
DTC Detection Condition
Trouble Area
C1422
When the stop light switch is off, the PM/C1 terminal voltage is 0.86
V or higher for 5 seconds ...