Dtc B2788 Ig2 Signal Malfunction
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT NO. 2 IGNITION RELAY (IG2)
CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)
CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY)
DTC 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 Techstream via the certification ECU as the steering lock ECU is not connected to the CAN communication system.DTC No.
| DTC Detecting Condition
| Trouble Area
|
B2788
| Different information is obtained from IG2 signal received directly from the IG2 circuit, and from IG2 signal sent via LIN communication for a period of 1 second.
| - IG2 relay
- Wire harness
- Main body ECU
- Steering lock actuator assembly (Steering lock 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 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 NO. 2 IGNITION RELAY (IG2) |
Remove the IG2 relay from the engine room relay block.
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
| When battery voltage is applied to terminals 1 and 2
| Below 1 Ω
|
| | REPLACE NO. 2 IGNITION RELAY (IG2) |
|
|
| 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
|
E39-2 (SGND) - Body ground
| Always
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection
| Switch Condition
| Specified Condition
|
E39-6 (IG2) - E39-1 (GND)
| Engine switch on (IG)
| 11 to 14 V
|
E39-6 (IG2) - E39-2 (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
| Switch Condition
| Specified Condition
|
*E39-6 (IG2) - E39-7 (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.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BATTERY) |
|
|
