STEERING LOCK SYSTEM, Diagnostic DTC:B2788
| DTC Code | DTC Name |
|---|---|
| B2788 | IG2 Signal Malfunction |
DESCRIPTION
The steering lock ECU determines the on/off status of the engine switch through the IG2 signal circuit.
After receiving an IG2 relay ON signal, the steering lock ECU determines that the vehicle is moving. The steering lock ECU does not lock the steering when it receives the IG2 relay ON signal. This prevents the steering from being locked while the vehicle is moving.
The diagnosis information of the steering lock ECU is transmitted to the tester via the certification ECU (smart key ECU assembly) as the steering lock ECU is not connected to the CAN communication system.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2788 | Different information is obtained from IG2 signals received directly from the IG2 circuit, and from IG2 signals sent via LIN communication for a period of 1 second. |
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WIRING DIAGRAM
INSPECTION PROCEDURE
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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, 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.
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After replacing the steering lock actuator assembly (steering lock ECU), confirm the lock/unlock operation of the steering lock Click here.
PROCEDURE
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INSPECT IGNITION RELAY NO. 2 (IG2)
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Remove the IG2 relay from the engine room relay block.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition 3 - 5 Always 10 kΩ or higher 3 - 5 Battery voltage is applied to terminals 1 and 2 Below 1 Ω
NG 
REPLACE IGNITION RELAY NO. 2 (IG2)
OK 
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CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)
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Disconnect the G22 connector from the steering lock actuator assembly.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition G22-1 (GND) - Body ground Always Below 1 Ω G22-2 (SGND) - Body ground Always Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
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CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY)
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Measure the voltage according to the value(s) in the table below.
Standard Voltage Tester Connection Condition Specified Condition G22-6 (IG2) - G22-1 (GND) Engine switch on (IG) 11 to 14 V G22-6 (IG2) - G22-2 (SGND) Engine switch on (IG) 11 to 14 V -
Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition *G22-6 (IG2) - G22-7 (B) Engine switch off 10 kΩ or higher *: This measurement is performed with the engine switch off to check for a short between IG2 and battery voltage.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY)
OK 
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Click here
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