Engine Immobilizer System (w/o Smart Key System)

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (w/o Smart Key System): TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER

(a) Disconnect the I34 transponder key amplifier connector.





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

HINT
Measure the values on the wire harness side with the connector disconnected.





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

(c) Reconnect the I34 transponder key amplifier connector.

(d) Measure the voltage and check for pulses according to the value(s) in the table below.





If the result is not as specified, the transponder key amplifier may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)









(2) Waveform 2 (Reference)









2. CHECK TRANSPONDER KEY ECU ASSEMBLY

(a) Disconnect the I19 transponder key ECU assembly connector.





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

HINT
Measure the values on the wire harness side with the connector disconnected.





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

(c) Reconnect the I19 transponder key ECU assembly connector.

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





If the result is not as specified, the transponder key ECU assembly may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)









(2) Waveform 2 (Reference)





Text in Illustration









(3) Waveform 3 (Reference)





Text in Illustration









(4) Waveform 4 (Reference)









3. CHECK ECM





HINT
The standard voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage for that pair of terminals, displayed in the "Specified Condition" column. The illustration above can be used as a reference to identify the ECM terminal locations.





(a) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)





Text in Illustration









(2) Waveform 2 (Reference)





Text in Illustration