GENERAL INFORMATION
1. TROUBLESHOOTING PROCEDURES
Procedure Type |
Details |
Troubleshooting Method |
---|---|---|
DTC Based Diagnosis |
The diagnosis procedure is based on the DTC that is stored. |
The malfunctioning part is identified based on the DTC detection conditions using a process of elimination. The possible trouble areas are eliminated one-by-one by use of the Techstream and inspection of related parts. |
Symptom Based Diagnosis (No DTCs stored) |
The diagnosis procedure is based on problem symptoms. |
The malfunctioning part is identified based on the problem symptoms using a process of elimination. The possible trouble areas are eliminated one-by-one by use of the Techstream and inspection of related parts. |
2. DESCRIPTION
System data and the Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for a malfunction and perform repairs.
3. DATA LINK CONNECTOR 3 (DLC3)
(a) The vehicle 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.
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|
7 (SIL) - 5 (SG) |
Bus "+" line |
During transmission |
Pulse generation |
4 (CG) - Body ground |
Chassis ground |
Always |
Below 1 Ω |
5 (SG) - Body ground |
Signal ground |
Always |
Below 1 Ω |
16 (BAT) - Body ground |
Battery positive |
Always |
11 to 14 V |
6 (CANH) - 14 (CANL) |
CAN bus line |
Ignition switch off* |
54 to 69 Ω |
6 (CANH) - 4 (CG) |
HIGH-level CAN bus line |
Ignition switch off* |
200 Ω or higher |
14 (CANL) - 4 (CG) |
LOW-level CAN bus line |
Ignition switch off* |
200 Ω or higher |
6 (CANH) - 16 (BAT) |
HIGH-level CAN bus line |
Ignition switch off* |
6 kΩ or higher |
14 (CANL) - 16 (BAT) |
LOW-level CAN bus line |
Ignition switch off* |
6 kΩ or higher |
NOTICE:
*: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches, or the doors.
If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.
(b) Connect the cable of the Techstream to the DLC3, turn the ignition switch on and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.
HINT:
Traction Off Switch
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE DRIVE MONITOR SWITCH
2. REMOVE MAP LIGHT ASSEMBLY
(a) Remove the screws.
(b) Detach the 2 clips and remove the map lig ...
Air Inlet Damper Control Servo Motor Circuit (B1442)
DESCRIPTION
The recirculation damper servo sub-assembly sends pulse signals to inform the
No. 1 air conditioning amplifier assembly of the damper position. The No. 1 air
conditioning amplifier assembly activates the motor (normal or reverse) based on
th ...