Toyota CH-R Service Manual: Diagnostic Trouble Code Chart

Toyota CH-R Service Manual / Steering Column / Steering Lock System / Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Steering Lock System

DTC No.	Detection Item	DTC Detection Condition	Note
B2781	Open / Short in Steering Lock ECU	One of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)): The steering lock sensor or unlock sensor is malfunctioning (When both detection switches turn on, the system is determined to be malfunctioning). The steering lock motor activation circuit has a short circuit. The steering lock motor activation circuit has an open circuit.	DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).
B2782	Power Source Control ECU Malfunction	Either of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)): The steering lock motor activation command circuit has a short circuit. The steering lock motor activation command circuit has an open circuit. HINT: If the power supply signal from the LIN communication line does not match the power supply signal from the direct line, the system is determined to be malfunctioning.	DTC Output Confirmation Operation: Perform a steering lock/unlock operation. (The steering locks when a door is opened with the shift lever in P and the engine switch off. The steering unlocks when the engine switch is turned on (ACC) or on (IG) while carrying the key.)
B2788	IG2 Signal Malfunction	Mismatch between the steering lock ECU (steering lock actuator or upper bracket assembly) IG2 input from the LIN communication system and from the direct line. (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).))	DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

DTC No.

Detection Item

DTC Detection Condition

Note

Link

B2781

Open / Short in Steering Lock ECU

One of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):

The steering lock sensor or unlock sensor is malfunctioning (When both detection switches turn on, the system is determined to be malfunctioning).
The steering lock motor activation circuit has a short circuit.
The steering lock motor activation circuit has an open circuit.

DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

B2782

Power Source Control ECU Malfunction

Either of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):

The steering lock motor activation command circuit has a short circuit.
The steering lock motor activation command circuit has an open circuit.

HINT:

If the power supply signal from the LIN communication line does not match the power supply signal from the direct line, the system is determined to be malfunctioning.

DTC Output Confirmation Operation: Perform a steering lock/unlock operation. (The steering locks when a door is opened with the shift lever in P and the engine switch off. The steering unlocks when the engine switch is turned on (ACC) or on (IG) while carrying the key.)

B2788

IG2 Signal Malfunction

Mismatch between the steering lock ECU (steering lock actuator or upper bracket assembly) IG2 input from the LIN communication system and from the direct line. (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).))

DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

Data List / Active Test

DATA LIST / ACTIVE TEST READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any ...

IG2 Signal Malfunction (B2788)

DESCRIPTION This DTC is stored when the steering lock ECU (steering lock actuator or upper bracket assembly) detects an IG2 power supply malfunction. HINT: The steering lock ECU (steering lock ac ...

Other materials:

Toyota CH-R Service Manual > Power Steering System: Calibration
CALIBRATION TORQUE SENSOR ZERO POINT CALIBRATION (USING TECHSTREAM) NOTICE: Perform torque sensor zero point calibration if any of the following conditions occur: The power steering ECU assembly has been replaced. The electric power steering column sub-assembly has been replaced. ...

Toyota CH-R Service Manual > Steering Lock System: Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: The steering lock ECU (steering lock actuator or upper bracket assembly) does not store history DTCs. If any DTCs are output, confirm and record them as soon as possible. Do not turn the engine switch off or clear the DTCs until the DTCs are confirmed ...

Toyota CH-R Service Manual: Diagnostic Trouble Code Chart

Data List / Active Test

IG2 Signal Malfunction (B2788)

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