DTC B2788 IG2 Signal Malfunction
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DESCRIPTION
The steering lock ECU determines the on/off status of the engine switch through the IG2 signal circuit.
After receiving an integration relay (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 integration relay (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 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
B2788 An open or short in the IG2 signal circuit.
Steering lock actuator assembly
(steering lock ECU)
IGN fuse
IG2 MAIN fuse
Integration relay (IG2 relay)
Main body ECU
Harness or connector
WIRING DIAGRAM
INSPECTION PROCEDURE
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 STEERING LOCK ECU
a. Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection Switch Condition
Specified
Condition
E26-6 (IG2) - E26-
1 (GND)
Engine switch off Below 1 V
E26-6 (IG2) - E26-
1 (GND)
Engine switch on
(IG)
11 to 14 V
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