Smart Key System (for Start Function)

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): TERMINALS OF ECU

1. CHECK POWER MANAGEMENT CONTROL ECU





(a) Disconnect the A35 and D89 connectors.

(b) Measure the voltage and resistance 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 A35 and D89 connectors.

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





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

(e) Using an oscilloscope, check the signal waveform of the ECU.

(1) Waveform 1









HINT
The wavelength becomes shorter as the engine speed increases.

(2) Waveform 2









Text in Illustration





(3) Waveform 3









Text in Illustration





(4) Waveform 4









HINT
The wavelength becomes shorter as the vehicle speed increases.

2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)





(a) Disconnect the D88 connector.

(b) Measure the voltage and resistance 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 D88 connector.

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





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

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





(a) Disconnect the D29 connector.

(b) Measure the voltage and resistance 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 D29 connector.

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





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