DESCRIPTION This DTC is
stored when the steering lock ECU (steering lock actuator or upper
bracket assembly) detects an IG2 power supply malfunction. HINT: The
steering lock ECU (steering lock actuator or upper bracket assembly) is
not connected to the CAN communication system. However, the steering
lock ECU (steering lock actuator or upper bracket assembly) is connected
to the certification ECU (smart key ECU assembly) via LIN communication
and communicates with other components via CAN communication through
the certification ECU (smart key ECU assembly). |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Note | | B2788 |
IG2 Signal Malfunction |
Mismatch
between the steering lock ECU (steering lock actuator or upper bracket
assembly) IG2 input from the LIN communication system and from the
direct line. (1-trip detection logic (Only output while a malfunction is
present and the engine switch is on (IG).)) |
- Steering lock ECU (steering lock actuator or upper bracket assembly)
- Wire harness or connector
| DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous). | Vehicle Condition and Fail-safe Function when Malfunction Detected |
Vehicle Condition when Malfunction Detected |
Fail-safe Function when Malfunction Detected | |
The steering cannot be locked or unlocked. For this reason, the engine cannot be started. |
- | Related Data List and Active Test Items |
DTC No. | Data List and Active Test | |
B2788 | - | WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine switch off, connect the
Techstream to the vehicle and turn a courtesy light switch on and off at
intervals of 1.5 seconds or less until communication between the
Techstream and the vehicle begins. Then select Model Code "KEY REGIST"
under manual mode and enter the following menus: Body Electrical / Smart
Key. While using the Techstream, periodically turn a courtesy light
switch on and off at intervals of 1.5 seconds or less to maintain
communication between the Techstream and the vehicle.
- The smart key system (for Start Function, Gasoline Model) uses the LIN
communication system and CAN communication system. Inspect the
communication function by following How to Proceed with Troubleshooting.
Troubleshoot the smart key system (for Start Function, Gasoline Model)
after confirming that the communication systems are functioning
properly.
Click here 
- Inspect the fuses for circuits related to this system before performing the following procedure.
- Before replacing the steering lock ECU (steering lock actuator or upper bracket assembly), refer to Registration.
Click here
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE |
1. | CHECK HARNESS AND CONNECTOR (POWER SOURCE) |
(a) Disconnect the G43 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
| (b) Measure the voltage according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G43-6 (IG2) - Body ground |
Engine switch on (IG) |
11 to 14 V | |
G43-6 (IG2) - Body ground |
Engine switch off |
Below 1 V | |
 |
|
*a | Front view of wire harness connector
(to Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)) | | |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR (GROUND) |
| (a) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G43-1 (GND) - Body ground |
Always | Below 1 Ω | |
 |
|
*a | Front view of wire harness connector
(to Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)) | | |
| OK |
| REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | |
Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid (B279986)
