DIAGNOSIS SYSTEM
1. DESCRIPTION
When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the vehicle's skid control ECU (brake actuator assembly).
The skid control ECU (brake actuator assembly) records DTCs when the ECU detects a malfunction in the ECU itself or in its circuits.
To check the DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream enables you to clear the DTCs, activate the various actuators, and check the Freeze Frame Data and Data List.
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge the battery before proceeding to the next step.
(b) Check the DLC3 (See page ).
2. DIAGNOSIS
(a) If the skid control ECU (brake actuator assembly) detects a malfunction, the ABS warning, brake warning and/or slip indicator lights will come on in order to warn the driver.
(b) The DTCs are simultaneously stored in memory. The DTCs can be read by connecting
SST between terminals TC and CG of the DLC3 and observing the blinking pattern of
the ABS warning and slip indicator lights, or by connecting the Techstream (See
page ).
(c) This system has a Test Mode (signal check) function (See page
).
3. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK
(a) When the ignition switch is turned to ON, check that the ABS warning, brake warning, and slip indicator lights come on for approximately 3 seconds.
HINT:
Trouble Area |
See procedure |
---|---|
ABS warning light circuit (Remains on) |
|
ABS warning light circuit (Does not come on) |
|
Brake warning light circuit (Remains on) |
|
Brake warning light circuit (Does not come on) |
|
Slip indicator light circuit (Remains on) |
|
Slip indicator light circuit (Does not come on) |
|
System Diagram
SYSTEM DIAGRAM
Transmitting ECU (Transmitter)
Receiving ECU
Signals
Communication Method
ECM
Skid control ECU
Throttle position signal
Engine speed signal
Accelerator pedal position ...
Acceleration Sensor Malfunction (C1420)
DESCRIPTION
Refer to DTCs C1419 and C1435 (See page ).
DTC Code
DTC Detection Condition
Trouble Area
C1420
After the difference between GL1 and GL2 becomes 0.6 G or more with the
vehicle stationary, the difference remains 0.4 G or m ...
USB port/AUX port
Connect an iPod, USB memory device or portable audio player to the USB port/AUX
port as indicated below. Select “iPod”, “USB” or “AUX” on the “Select Audio Source”
screen and the device can be operated via multimedia system.
Connecting using the USB port/AUX port
■ iPod
...