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Home >> Lexus >> 2012 >> IS 250C V6-2.5L (4GR-FSE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Testing and Inspection >> Pinout Values and Diagnostic Parameters >> Smart Access System With Push-Button Start (for Entry Function)
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Smart Access System With Push-Button Start (for Entry Function)





THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function): TERMINALS OF ECU

1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the P33 certification ECU (smart key ECU assembly) connector.





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

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





* If the result is not as specified, the wire harness side may have a malfunction.

(c) Reconnect the P33 certification ECU (smart key ECU assembly) connector.

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









If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.

2. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

(a) Disconnect the RK, RN and RD junction block connectors.





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

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





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

(c) Reconnect the RK, RN, and RD junction block connectors.

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





If the result is not as specified, the main body ECU RH (cowl side junction block RH) may have a malfunction.

3. CHECK MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)

(a) Disconnect the LD junction block connector.





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

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





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

(c) Reconnect the LD junction block connector.

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





If the result is not as specified, the main body ECU LH (cowl side junction block LH) may have a malfunction.
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