Dtc B2788 Ig2 Signal Malfunction
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT IGNITION RELAY NO. 2
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND)
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY)
DTC B2788 IG2 Signal Malfunction |
DESCRIPTION
The steering lock ECU (steering lock actuator assembly) receives power from the IG2 relay. When the digital signal from the certification ECU (smart key ECU assembly) and the voltage from the IG2 relay are received by the steering lock ECU (steering lock actuator assembly), the steering will be unlocked. The steering lock ECU (steering lock actuator assembly) will not lock the steering wheel when power from the IG2 relay is present (this prevents the steering wheel from being locked while the vehicle is moving).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 1 second.
| - IG2 relay
- Harness or connector
- Main body ECU
- Steering lock ECU (Steering lock actuator assembly)
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever in P, open and close the driver door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start.
- After replacing the steering lock ECU (steering lock actuator assembly), perform the key ID code registration.
- HINT:
- 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.INSPECT IGNITION RELAY NO. 2 |
Remove the IG2 relay from the engine room R/B.
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 IGNITION RELAY NO. 2 |
|
|
| 2.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND) |
Disconnect the E69 connector from the steering lock ECU.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
E69-1 (GND) - Body ground
| Always
| Below 1 Ω
|
E69-2 (SGND) - Body ground
| Always
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY) |
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
E69-6 (IG2) - E69-1 (GND)
| Engine switch on (IG)
| 10 to 14 V
|
E69-6 (IG2) - E69-2 (SGND)
| Engine switch on (IG)
| 10 to 14 V
|
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
*E69-6 (IG2) - E69-7 (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.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (STEERING LOCK ECU - BATTERY) |
|
|
