Engine Immobiliser System (W/ Entry And Start System) Diagnosis System
Securities. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
DESCRIPTION
CHECK DLC3
Engine Immobiliser System (W/ Entry And Start System) -- Diagnosis System |
Engine immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle's Data Link Connector 3 (DLC3). In some cases, a malfunction may be occurring in the immobiliser system even though the security indicator light is not illuminated. When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.
The vehicle's ECU uses the ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.
Symbols (Terminal No.)
| Terminal Description
| Condition
| Specified Condition
|
SIL (7) - SG (5)
| Bus "+" line
| During transmission
| Pulse generation
|
CG (4) - Body ground
| Chassis ground
| Always
| Below 1 Ω
|
SG (5) - Body ground
| Signal ground
| Always
| Below 1 Ω
|
BAT (16) - Body ground
| Battery positive
| Always
| 11 to 14 V
|
CANH (6) - CANL (14)
| HIGH-level CAN bus line
| Engine switch off*
| 54 to 69 Ω
|
CANH (6) - Battery positive
| HIGH-level CAN bus line
| Engine switch off*
| 6 kΩ or higher
|
CANH (6) - CG (4)
| HIGH-level CAN bus line
| Engine switch off*
| 200 Ω or higher
|
CANL (14) - Battery positive
| LOW-level CAN bus line
| Engine switch off*
| 6 kΩ or higher
|
CANL (14) - CG (4)
| LOW-level CAN bus line
| Engine switch off*
| 200 Ω or higher
|
- NOTICE:
- *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, other switches or doors.
- HINT:
- Connect the cable of the intelligent tester to the DLC3, turn the engine switch on (IG) and attempt to use the intelligent tester. If the screen displays UNABLE TO CONNECT TO VEHICLE, a problem exists in the vehicle side or the tester side.
- If the communication is normal when the tester is connected to another vehicle, inspect the DLC3 on the original vehicle.
- If the communication is still not possible when the tester is connected to another vehicle, the problem is probably in the tester itself. Consult the Service Department listed in the tester's instruction manual.
