Engine Immobiliser System

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER





(a) Disconnect the D24 transponder key amplifier connector.

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

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

(c) Reconnect the D24 transponder key amplifier connector.

(d) Measure the resistance and voltage of the connector.

Standard:

(d) If the result is not as specified, there may be a malfunction in the amplifier.

(e) Inspect using an oscilloscope.

(1) Waveform 1









(2) Waveform 2









2. CHECK TRANSPONDER KEY ECU ASSEMBLY





(a) Disconnect the D23 transponder key ECU connector.

(b) Measure the voltage and resistance of the wire harness side connector.

Standard:

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

(c) Reconnect the D23 transponder key ECU connector.

(d) Measure the voltage of the connector.

Standard voltage:

(d) If the result is not as specified, there may be a malfunction in the ECU.

(e) Inspect using an oscilloscope.

(1) Waveform 1









(2) Waveform 2









(3) Waveform 3









(4) Waveform 4









(f) Measure the resistance between each pair of connector terminal.

Standard resistance:

3. CHECK ECM





(a) Disconnect the A21 ECM connector.

(b) Measure the voltage and resistance of the wire harness side connector.

Standard:

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

(c) Reconnect the A21 ECU connector.

(d) Inspect using an oscilloscope.

(1) Waveform 1









(2) Waveform 2