DESCRIPTION
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 UPR bracket assembly) is determined to be abnormal.
HINT:
The steering lock ECU (steering lock actuator or UPR bracket assembly) is not connected to the CAN communication system. However, the steering lock ECU (steering lock actuator or UPR 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*) :
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. |
|
DTC Output Confirmation Operation: Perform a steering lock/ unlock operation. (The steering locks when a door is opened with the shift lever in 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 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 (the engine does not crank). |
DTC No. |
Data List Item |
Active Test Item |
---|---|---|
B2782 |
Smart Key
|
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
INSPECT STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY (MOTOR ACTIVATION COMMAND SIGNAL) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.
(b) Disconnect the steering lock ECU (steering lock actuator or UPR bracket assembly) connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Reconnect the steering lock ECU (steering lock actuator or UPR bracket assembly) connector.
(e) Move the shift lever to P and turn the engine switch off.
(f) Check the signal waveform according to the condition(s) in the table below. Standard Frequency:
HINT:
|
|
NG |
GO TO STEP 4 |
|
2. |
CLEAR DTC AND DATA LIST MALFUNCTION RECORD |
(a) Clear the DTCs (See page ).
(b) 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.
CAUTION:
After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notices before proceeding with work (See page ).
|
3. |
READ VALUE USING TECHSTREAM (POWER SUPPLY SHORT) |
(a) Perform the DTC output confirmation operation.
(b) Check if DTC B2782 is output (See page ).
(c) Use the Data List to check if the steering lock control is functioning properly.
Smart Key
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Power Supply Short |
Record of malfunction of signal sent to steering lock motor (steering lock actuator assembly) from certification ECU (smart key ECU assembly) (short circuit) (DTC B2782 is output) / OK or NG(Past) |
OK: No record of malfunction (short circuit) NG(Past): Record of malfunction (short circuit) exists |
This item records malfunctions in the circuit between the certification ECU (smart key ECU assembly) and steering lock motor (steering lock actuator assembly). |
Result |
Proceed to |
---|---|
|
A |
|
B |
A |
SYSTEM RETURNED TO NORMAL (DTC STORED DUE TO BAD CONNECTION, BUT SYSTEM RETURNED TO NORMAL BY RECONNECTING CONNECTOR) |
B |
REPLACE STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY |
4. |
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPR BRACKET ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(b) Disconnect the S45 steering lock ECU (steering lock actuator or UPR bracket assembly) connector.
(c) Disconnect the C29 certification ECU (smart key ECU assembly) connector.
(d) Check for deformation and corrosion of the connector case and terminals.
OK:
There is no deformation or corrosion of the connector case or terminals.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
S45-3 (IGE) - C29-24 (SLR+) |
Always |
Below 1 Ω |
S45-3 (IGE) or C29-24 (SLR+) - Body ground |
Always |
10 kΩ or higher |
OK |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Illumination Circuit
DESCRIPTION
Power is supplied to the radio and display receiver assembly and steering pad
switch assembly illumination when the light control switch is in the TAIL or HEAD
position.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
The vehicle is equipped with a Supplemental Restrain ...
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Sliding Roof / Trouble Codes.
(e) Check the details of the DTC(s) (See page
).
2. CLEAR DTC
(a) Connect th ...