SWS Simplified Fault Diagnostic Mode
The following tests can be performed using the SWS Simplified Fault Diagnosis Mode:- SWS ECU specification
- Switch input signals for each ECU
- Diagnostic trouble code output
SWITCHING TO SIMPLIFIED FAULT DIAGNOSTIC MODE
1. Ground the No. 1 terminal of the data link connector (diagnostic control terminal) using a special tool.
2. Turn the ignition switch ON.
3. Operate the passing switch twice or more within five seconds.
SIMPLIFIED FAULT DIAGNOSTIC MODE SELECTION
The Simplified Fault Diagnostic Mode comprises the following three modes; these modes can be switched by operating the ignition or other switches.
NOTE: Refer to switches which can be checked.
When the ignition is switched ON initially, the system will be in Diagnostic Trouble Code Output Mode.
Specification Confirmation Mode
This is a mode which displays a flashing pattern for the various ECU specifications of the Simplified Wiring System (SWS) on the high beam indicator lamp, similar to that shown at left, enabling the operator to confirm whether the vehicle is fitted with the correct specification ECU. If the codes in the table below are output, it can be concluded that the situation is normal.
NOTE: Because the code is output only once, it is necessary to switch once to another mode when you wish to re-confirm a code.
Display for Normal Parameters:
Diagnostic Trouble Code Output mode
Diagnostic codes are displayed by the flashing of the high beam indicator lamp. A normal pattern is shown in the diagram at left, and when a breakdown occurs, the same flashing pattern as Specification Confirmation Mode is displayed.
NOTE: Diagnostic codes are output once each in diminishing number order, it is therefore necessary to switch once to another mode when you wish to reconfirm a code.
Switch Diagnosis Mode
This is a mode in which the switch input signals which are input into each ECU on the Simplified Wiring System (SWS) can be checked - if the input signal for a switch is normal when that switch is operated in this mode, the high beam indicator lamp flashes and a buzzer sounds.
Returning to Normal Mode
1. Turn the ignition switch OFF
2. Remove the special tool from the data link connector. The mode will now return to Normal.