Engine Immobilizer System

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM: TERMINALS OF ECU

1. CHECK ENGINE SWITCH





(a) Measure the resistance and voltage according to the value(s) in the table below.

Inspection with Engine Switch Off





Inspection of Waveforms of Communication Signals between Engine Switch and Certification ECU





HINT
*: Remove the key battery before performing this inspection.

(b) Inspect using an oscilloscope.

NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1 (Reference)





Measurement Condition





(2) Waveform 2 (Reference)





Text in Illustration





Measurement Condition





HINT
*: Remove the key battery before performing this inspection.

(3) Waveform 3 (Reference)





Measurement Condition





2. CHECK CERTIFICATION ECU





(a) Disconnect the G26 ECU connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.





* *: In order to prevent the battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is set in the circuit. If the fuse is removed, the circuit becomes open. If the fuse between the battery and terminal CUTB is removed and the circuit is open, the certification ECU changes to a certain control mode (example: the transmission of electric waves every 250 ms. that form the detection area stops).

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the G26 ECU connector.

(d) Measure the resistance and voltage according to the value(s) in the table below.

Inspection with Engine Switch Off





Inspection of Waveforms of Communication Signals between Engine Switch and Certification ECU





HINT
*: Remove the key battery before performing this inspection.

(e) Inspect using an oscilloscope.

NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1 (Reference)





Measurement Condition





(2) Waveform 2 (Reference)





Text in Illustration





Measurement Condition





HINT
*: Remove the key battery before performing this inspection.

(3) Waveform 3 (Reference)





Measurement Condition





3. CHECK ID CODE BOX





(a) Disconnect the G25 box connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the G25 box connector.

(d) Measure the voltage according to the value(s) in the table below.





(e) Inspect using an oscilloscope.

NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1 (Reference)





Text in Illustration





Measurement Condition





(2) Waveform 2 (Reference)





Text in Illustration





Measurement Condition





4. CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)





(a) Measure the voltage and resistance according to the value(s) in the table below.





HINT
* *1: The steering locks when any door is opened with the shift lever in P and the engine switch off. The steering lock unlocks when the engine switch is turned on (ACC).
* *2: This DTC indicates an IG2 input malfunction. If the power source mode recognized by the power management control ECU and the power source mode recognized by the steering lock ECU do not match, this DTC is stored.

(b) Inspect using an oscilloscope.

NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1 (Reference)





Text in Illustration





Measurement Condition





5. CHECK ECM





(a) Measure the voltage according to the value(s) in the table below.





(b) Inspect using an oscilloscope.

NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1 (Reference)





Text in Illustration





Measurement Condition





(2) Waveform 2 (Reference)





Text in Illustration





Measurement Condition