Diagnosis System

STEERING COLUMN: STEERING LOCK SYSTEM: DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) When troubleshooting a vehicle with a diagnosis system, connect the Techstream to the DLC3 of the vehicle and read various data output from the steering lock ECU.

The steering lock ECU records DTCs when the ECU detects a malfunction in itself or in its circuits.

(b) 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.

(c) The steering lock ECU does not store DTCs regarding past problems.

HINT
When the engine switch is off, the main body ECU to which the Techstream is to be connected may be malfunctioning or in sleep mode.

Communication with the Techstream is impossible if the main body ECU is not working.

(d) As the steering lock ECU's memory data will be deleted, do not remove the fuses or disconnect the battery terminals until the DTCs are checked and noted.

(e) Malfunctions related to systems other than the steering lock ECU's system may cause DTCs to be output. Note any DTCs related to other systems.