19-5 Electrical System Troubleshooting DIAGNOSIS (SELF DIAGNOSIS FUNCTION) General When the computer detects a problem in the system, the fault is indicated by lighting a warning lamp on the combination meter and displaying an error code. And fail-safe functions are started automatically to stop the engine or control the engine to a low speed. 0 DIAGNOSIS DISPLAY METHOD 1 Error code display 1. Diagnosis display method The diagnosis is displayed by means of an error code as shown in the illustration to the left, and by the lights turning on. When the ignition key switch is turned ON, the lamp lights once to allow checking for the bulb, and then turns off again if the status is normal.
With the ignition key switch ON, if an abnormality is detected when the vehicle is stopped, travelling or performing meterials handling operations, an error code is displayed and the lamps turn on as a warning. When this happens, stop the vehicle immediately and check the error code. 2 3 4 An orange colored lamp lights (Engine ECU only) Lamp blinks 5 6 2. Diagnosis memory display method To display the diagnosis memory display, there are a method using the hour meter and tilt lever, a method using the optional display, and a method using a plug-in analyzer. Here the display method using the hour meter and tilt lever is described. 7 8 (1) From the main menu, display the diagnosis memory menu.
For how to display the main menu, refer to page 18-30. 9 (2) A diagnosis No. and error code are displayed each time the knob switch is pressed and released. Each error code and the time at which it occurred are displayed alternately at 2 second intervals. Note: The maximum number of error codes that can be stored is 10. The smaller the diagnosis No., the more recent the error is. The stored time of an error code appearing just when the ignition key switch is turned ON may be stored as 0.0. 10 11 12 (3) Connect the matching connector and turn the ignition key switch OFF. 13 Knob switch 14 Diagnosis memory menu 15 16 Press the knob switch to return it.
17 Switches automatically every 2 seconds 18 19 20 21 E Section 19