Another function is the Input Signal Check, which checks if the signals from various switches are sent to the ECU correctly. By using these functions, the problem areas can be narrowed down and troubleshooting is more effective. Diagnostic functions are incorporated in the following systems in the LAND CRUISER.
SYSTEM DTC DTC FREEZE SENSOR CHECK / TEST MODE DATA ACTIVE CUSTOMIZE CHECK CHECK FRAME DATA (INPUT SIGNAL CHECK) LIST TEST PARAMETER (NORMAL (CHECK MODE) MODE) SFI System (2UZ-FE) ○ ○ ○ ○ ○ Automatic Transmission System ○ ○ ○ ○ (A750F) Active Height Control Suspension ○ Tire Pressure Warning System ○ ○ ○ Vehicle Stability Control System ○ ○ ○ ○ ○ ○ Power Tilt and Power Telescopic ○ ○ Steering Column System Air Conditioning System ○ ○ ○ ○ Airbag System ○ ○ ○ ○ Occupant Classification System ○ ○ ○ ○ Seat Belt Warning System ○ Theft Deterrent System ○ ○ ○ Engine Immobiliser System ○ ○ ○ Cruise Control System ○ ○ Lighting System ○ ○ ○ ○ Wiper and Washer System Power Door Lock Control System ○ ○ ○ ○ Wireless Door Lock Control System ○ ○ ○ ○ Key Reminder Warning System ○ Meter / Gauge System ○ ○ Audio and Visual System ○ Navigation System ○ Rear View Monitor System ○ Power Window Control System ○ ○ ○ ○ Sliding Roof System Multiplex Communication System ○ CAN Communication System ○ In the DTC check, it is very important to determine whether the problem indicated by the DTC is either:
1) still occurring, or 2) occurred in the past but has since returned to normal. In addition, the DTC should be compared to the problem symptom to see if they are related. For this reason, DTCs should be checked before and after confirmation of symptoms (i.e., whether or not problem symptoms exist) to determine current system conditions, as shown in the flowchart below. Never skip the DTC check. Failing to check DTCs may, depending on the case, result in unnecessary troubleshooting for systems operating normally or lead to repairs not related to the problem. Follow the procedures listed in the flowchart in the correct order.
The following flowchart shows how to proceed with troubleshooting using the DTC check. Directions from the flowchart will indicate how to proceed either to DTC troubleshooting or to the troubleshooting of each problem symptom. agn 1. DTC CHECK NEXT 2. MAKE A NOTE OF DTCS DISPLAYED AND THEN CLEAR MEMORY NEXT 3.
SYMPTOM CONFIRMATION cardi SYSTEM DTC CHECK (NORMAL MODE) DTC CHECK (CHECK MODE) FREEZE FRAME DATA SENSOR CHECK / TEST MODE (INPUT SIGNAL CHECK) DATA LIST ACTIVE TEST CUSTOMIZE PARAMETER SFI System (2UZ-FE) ○ ○ ○ ○ ○ Automatic Transmission System (A750F) ○ ○ ○ ○ Active Height Control Suspension ○ Tire Pressure Warning System ○ ○ ○ Vehicle Stability Control System ○ ○ ○ ○ ○ ○ Power Tilt and Power Telescopic Steering Column System ○ ○ Air Conditioning System ○ ○ ○ ○ Airbag System ○ ○ ○ ○ Occupant Classification System ○ ○ ○ ○ Seat Belt Warning System ○ Theft Deterrent System ○ ○ ○ Engine Immobiliser System ○ ○ ○ Cruise Control System ○ ○ Lighting System ○ ○ ○ ○ Wiper and Washer System Power Door Lock Control System ○ ○ ○ ○ Wireless Door Lock Control System ○ ○ ○ ○ Key Reminder Warning System ○ Meter / Gauge System ○ ○ Audio and Visual System ○ Navigation System ○ Rear View Monitor System ○ Power Window Control System ○ ○ ○ ○ Sliding Roof System Multiplex Communication System ○ CAN Communication System ○