THEFT DETERRENT / KEYLESS ENTRY ENTRY AND START SYSTEM(for Start Function) B2788 IG2 Signal Malfunction
DESCRIPTION
This DTC is stored when the steering lock ECU (steering lock actuator or upper bracket assembly) detects an IG2 power supply malfunction.
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) ·
Harness or connector |
DTC Output Confirmation Operation:
Any time |
| 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. | - |
| DTC No. | Data List and Active Test |
|---|---|
| B2788 | - |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
·When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
·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 the Service Bulletin.
·After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
| *a | Front view of wire harness connector
(to Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)) |
Disconnect the steering lock ECU (steering lock actuator or upper bracket assembly) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N157-1 (GND) - Body ground Always Below 1 Ω
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition N157-6 (IG2) - N157-1 (GND) Engine switch on (IG) 11 to 14 V N157-6 (IG2) - N157-1 (GND) Engine switch off Below 1 V
- Result:
Proceed to OK NG
OK
NG