Dtc B2782 Power Source Control Ecu Malfunction
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)
CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU)
DTC B2782 Power Source Control ECU Malfunction |
DESCRIPTION
The steering lock ECU activates the steering lock motor by the power from the main body ECU* through the IGE circuit. This prevents the steering from being locked while the vehicle is moving.The diagnosis information of the steering lock ECU is transmitted to the Techstream via the certification ECU as the steering lock ECU is not connected to the CAN communication system.- HINT:
- *: The power source control ECU is not a physical part. This code refers to the power source control function performed by the main body ECU.
DTC No.
| DTC Detecting Condition
| Trouble Area
|
B2782
| Steering lock motor drive control circuit is defective.
| - Wire harness
- Steering lock actuator assembly (Steering lock ECU)
- Main body ECU
|
WIRING DIAGRAM
INSPECTION PROCEDURE
When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following step to wake up the ECU:Before starting the inspection, open the driver side door with the engine switch off. Then (with the engine switch still off) open and close any door several times at 1.5-second intervals.- NOTICE:
- If the steering lock actuator (steering lock ECU) is replaced, open and close the driver side door with the engine switch off and the shift lever in neutral to record the current lock position into the steering lock ECU. If this is not performed, the engine may not start.
1.INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection
| Condition
| Specified Condition
|
E39-3 (IGE) - E39-1 (GND)
| The specified condition should be checked after performing the following:
- Turn the engine switch off
- Turn the engine switch on (ACC or IG)
| - Motor activated: Below 1 V
- Motor not activated: 11 to 14 V
|
E39-3 (IGE) - E39-1 (GND)
| The specified condition should be checked after performing the following:
- Move the shift lever to P
- Turn the engine switch off
- Open the driver's door
| - Motor activated: Below 1 V
- Motor not activated: 11 to 14 V
|
- HINT:
- The steering lock ECU and steering lock actuator assembly are supplied as a unit.
2.CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND) |
Disconnect the E39 connector from the steering lock actuator assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
E39-1 (GND) - Body ground
| Always
| Below 1 Ω
|
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3.CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU) |
Disconnect the E50 connector from the main body ECU.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
E39-3 (IGE) - E50-7 (SLR+)
| Always
| Below 1 Ω
|
E39-3 (IGE) - Body ground
| Always
| 10 kΩ or higher
|
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|