RM3660EC _58 Vehicle Interior _080747 THEFT DETERRENT / KEYLESS ENTRY _0586354 SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series)) C

THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series))  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.

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

B463089E14
0.854,3.333 2.448,3.573 1.594,0.24 10 false : LIN Communication Line 0.104,2.604 2.76,2.958 2.656,0.354 10 false Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly) 0.115,2.448 1.146,2.698 1.031,0.25 10 false I59 1.521,2.063 1.99,2.26 0.469,0.198 10 false GND 1.927,1.948 2.396,2.146 0.469,0.198 10 false 1 1.615,0.396 2.083,0.594 0.469,0.198 10 false IG2 1.948,0.302 2.417,0.5 0.469,0.198 10 false 6 1.938,0.563 3.313,0.958 1.375,0.396 10 false STRG LOCK-IG2 3.427,0.396 4.885,0.792 1.458,0.396 10 false from IG2 NO. 1 Relay 5.552,2.469 7.063,2.844 1.51,0.375 10 false Certification ECU (Smart Key ECU Assembly)

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(CAN). 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.

·

The smart entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (NR Series))>HOW TO PROCEED WITH TROUBLESHOOTING

·

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 Service Bulletin.

·

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 I59 steering lock ECU (steering lock actuator or upper bracket assembly) connector.


b.
C350526C77
1.479,1.021 1.896,1.271 0.417,0.25 2.313,3.094 2.01,3.094 2.01,3.094 2.01,2.531 true 0.323,0.208 0.635,0.365 0.313,0.156 10 false *a 1.594,1.052 1.958,1.26 0.365,0.208 10 false I59 2.375,3.01 2.823,3.24 0.448,0.229 10 false IG2
*a Front view of wire harness connector
(to Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly))


Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
I59-6 (IG2) - Body ground Engine switch on (IG) 11 to 14 V
I59-6 (IG2) - Body ground Engine switch off Below 1 V



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (GROUND)
a.
C350526C78
1.479,1.063 1.896,1.313 0.417,0.25 0.979,3.104 1.25,3.104 1.25,3.104 1.25,2.521 true 0.323,0.208 0.635,0.365 0.313,0.156 10 false *a 1.594,1.094 1.958,1.302 0.365,0.208 10 false I59 0.646,3.021 1.094,3.25 0.448,0.229 10 false GND
*a Front view of wire harness connector
(to Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly))


Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
I59-1 (GND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR