Dtc B2782 Power Source Control Ecu Malfunction
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK DTC OUTPUT (B2785)
INSPECT STEERING LOCK ECU
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - MAIN BODY ECU AND BODY GROUND)
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 intelligent tester via the certification ECU (smart key ECU assembly) as the steering lock ECU is not connected to the CAN communication system.
| DTC Code | Detection Condition | Trouble Area |
| B2782 | IGE power supply circuit malfunction | Steering lock actuator assembly (steering lock ECU)
Main body ECU
Harness or connector
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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 steps to wake up the ECU:
- With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.
| 1.CHECK DTC OUTPUT (B2785) |
Check for DTCs ().
- OK:
- DTC B2782 is output, but DTC B2785 is not output.
| | GO TO LIN COMMUNICATION SYSTEM (B2785) ()
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| 2.INSPECT STEERING LOCK ECU |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| E26-3 (IGE) - E26-1 (GND) | Engine switch on (IG)
Steering lock motor is operating
| Below 1 V |
| E26-3 (IGE) - E26-1 (GND) | Engine switch on (IG)
Steering lock motor is not operating
| 11 to 14 V |
Result| Result | Proceed to |
| Within specified range (for Power tilt and telescopic) | A |
| Outside specified range | B |
| Within specified range (for Manual tilt and telescopic) | C |
- When the steering lock is activated and the engine switch is turned on (IG), the steering lock motor activates to release the steering lock. The motor operation occurs for 2 to 15 seconds.
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| | REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) ()
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| A | |
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| REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) ()
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| 3.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - MAIN BODY ECU AND BODY GROUND) |
Disconnect the E26 steering lock ECU connector.
Disconnect the E1 main body ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E26-3 (IGE) - E1-19 (SLR+) | Always | Below 1 Ω |
| E26-1 (GND) - Body ground | Always | Below 1 Ω |
| E26-3 (IGE) or E1-19 (SLR+) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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