RM35X0E _58 Vehicle Interior _078378 THEFT DETERRENT / KEYLESS ENTRY _0397001 ENTRY AND START SYSTEM(for Start Function) C

THEFT DETERRENT / KEYLESS ENTRY  ENTRY AND START SYSTEM(for Start Function)  B2782  Power Source Control ECU Malfunction  


DESCRIPTION

The certification ECU (smart key ECU assembly) has a power source mode switching function.

This DTC is stored when the IGE input (the steering lock motor activation permission signal) sent directly from the certification ECU (smart key ECU assembly) to the steering lock ECU (steering lock actuator or upper bracket assembly) is determined to be abnormal.

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
B2782 Power Source Control ECU Malfunction Either of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):
·

The steering lock motor activation command circuit has a short circuit.

·

The steering lock motor activation command circuit has an open circuit.


HINT:

If the power supply signal from the LIN communication line does not match the power supply signal from the direct line, the system is determined to be malfunctioning.


·

Steering lock ECU (steering lock actuator or upper bracket assembly)

·

Certification ECU (Smart key ECU assembly)

·

Harness or connector


DTC Output Confirmation Operation:

Perform a steering lock/unlock operation. (The steering locks when a door is opened with the shift state park (P) and the engine switch off. The steering unlocks when the engine switch is turned on (ACC) or on (IG) while carrying the key.)



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. Prohibits the engine from being started.

Related Data List and Active Test Items
DTC No. Data List and Active Test
B2782 -

WIRING DIAGRAM

B499897E07
0.885,3.406 2.688,3.74 1.802,0.333 10 false : LIN Communication Line 5.333,2.552 5.99,2.792 0.656,0.24 10 false N156 5.969,0.646 6.625,0.885 0.656,0.24 10 false SLR+ 5.729,0.656 6.385,0.896 0.656,0.24 10 false 25 2.542,0.667 3.198,0.906 0.656,0.24 10 false 3 2.188,0.688 2.844,0.927 0.656,0.24 10 false IGE 1.885,0.125 2.542,0.365 0.656,0.24 10 false +B 2.573,1.948 3.229,2.188 0.656,0.24 10 false 1 2.146,2.094 2.802,2.333 0.656,0.24 10 false GND 5.344,2.729 7.156,3.177 1.813,0.448 10 false Certification ECU (Smart Key ECU Assembly) 0.375,2.698 3.594,3.323 3.219,0.625 10 false Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly) 0.365,2.542 1.021,2.781 0.656,0.24 10 false N157 1.198,0.823 1.854,1.063 0.656,0.24 10 false IC

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.

·

The 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 entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ENTRY AND START SYSTEM (for Start Function)>HOW TO PROCEED WITH TROUBLESHOOTING

·

Before replacing the steering lock ECU (steering lock actuator or upper bracket assembly) or certification ECU (smart key ECU assembly), refer to the Service Bulletin.

·

After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

·

After the engine switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the battery

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

HINT:

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART




PROCEDURE

1.INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) (MOTOR ACTIVATION COMMAND SIGNAL)
a.
C389181C17
0.323,2.917 1.656,3.021 1.333,0.104 2.344,2.969 2.75,3.073 0.406,0.104 1.594,4.063 2.417,4.167 0.823,0.104 0.167,0.844 0.573,1.083 0.406,0.24 0.917,3.198 0.917,3.031 false 2,4.063 2,3.896 false 2.573,3.25 2.573,3.073 false 0.688,1.75 1.854,1.083 false 2.302,1.083 2.917,1.75 false 0.104,0.094 0.417,0.25 0.313,0.156 10 false *a 0.844,3.219 1.156,3.375 0.313,0.156 10 false *c 1.938,3.75 2.25,3.906 0.313,0.156 10 false *d 2.5,3.281 2.813,3.479 0.313,0.198 10 false *c 0.573,1.802 1.031,2 0.458,0.198 10 false IGE 2.792,1.802 3.25,2 0.458,0.198 10 false GND 2.969,4.063 3.427,4.26 0.458,0.198 10 false GND 0.25,0.896 0.708,1.094 0.458,0.198 10 false N157 0.135,2.292 0.448,2.448 0.313,0.156 10 false *b
*a Component with harness connected
(Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly))
*b Waveform
*c Steering Lock Motor not Operating
*d Steering Lock Motor Operating


Using an oscilloscope, check the waveform.

OK:
Tester Connection Tool Setting Condition Specified Condition
N157-3 (IGE) - N157-1 (GND) 2 V/DIV., 200 ms./DIV. Any door opened when following conditions are met, and then steering lock motor activated:
·

Shift state park (P)

·

Steering lock unlocked in advance by carrying key and turning engine switch on (IG)

·

After above conditions are met, engine switch turned off


Pulse generation
(See waveform)


HINT:
·

When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.

·

In order to take measurements when the lock motor is operating, perform either of the following operations:

-

To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG).

-

To lock the steering, turn the engine switch off with the shift state park (P), and then open a door.





Result:
Proceed to
OK
NG



OK

2.CLEAR DTC AND DATA LIST MALFUNCTION RECORD

NG

4.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) AND BODY GROUND)
2.CLEAR DTC AND DATA LIST MALFUNCTION RECORD
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Entry&Start / Trouble Codes.


e.

Clear the DTCs.

Body Electrical > Entry&Start > Clear DTCs
50002 125

f.

Disconnect the cable from the negative (-) battery terminal, wait for 30 seconds or more, and then reconnect the cable to the negative (-) battery terminal to clear the record of malfunctions stored in the Data List.

NOTICE:
·

After the engine switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the battery

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>WORK PROCEDURE

HINT:

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART





Result:
Proceed to
NEXT



NEXT

3.CHECK FOR DTC
3.CHECK FOR DTC
a.

Perform the DTC output confirmation operation.


b.

Enter the following menus: Body Electrical / Entry&Start / Trouble Codes.


c.

Check if DTC B2782 is output.

Body Electrical > Entry&Start > Trouble Codes
50001 125

Result:
Result Proceed to
DTC B2782 is not output. A
DTC B2782 is output. B



A

SYSTEM RETURNED TO NORMAL (DTC STORED DUE TO BAD CONNECTION, BUT SYSTEM RETURNED TO NORMAL BY RECONNECTING CONNECTOR)

B

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

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY


4.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) AND BODY GROUND)
a.

Disconnect the N157 steering lock ECU (steering lock actuator or upper bracket assembly) connector.


b.

Disconnect the N156 certification ECU (smart key ECU assembly) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N157-3 (IGE) - N156-25 (SLR+) Always Below 1 Ω
N157-1 (GND) - Body ground Always Below 1 Ω
N157-3 (IGE) or N156-25 (SLR+) - Other terminals and body ground Always 10 kΩ or higher


NOTICE:

If the result is not as specified, check for looseness in the connection which leads to ground.



Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR