Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS2011HS 250H L4-2.4L (2AZ-FXE) HYBRIDREPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTANTITHEFT AND ALARM SYSTEMSTESTING AND INSPECTIONPINOUT VALUES AND DIAGNOSTIC PARAMETERSSMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR ENTRY FUNCTION)
2011 Lexus HS 250h L4-2.4L (2AZ-FXE) Hybrid
Smart Access System With Push-Button Start (for Entry Function)
2011 Lexus HS 250h L4-2.4L (2AZ-FXE) HybridSECTION 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 F50 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 the connector disconnected.
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Reconnect the F50 certification ECU (smart key ECU assembly) 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 certification ECU (smart key ECU assembly) may have a malfunction.
2. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Disconnect the 2C, F7 and 2B junction block connectors.
(b) Disconnect the MB main body ECU (multiplex network body ECU) connector.
(c) Measure the voltage and resistance according to the value(s) in the table below.
HINT
Measure the values on the wire harness side with the connectors disconnected.
If the result is not as specified, there may be a malfunction in the wire harness.
(d) Reconnect the 2C, F7 and 2B junction block connectors.
(e) Reconnect the MB main body ECU (multiplex network body ECU) connector.
(f) Measure the voltage according to the value(s) in the table below.
If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may have a malfunction.
3. COMBINATION METER ASSEMBLY
(a) Disconnect the F4 combination meter 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 the connector disconnected.
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Reconnect the F4 combination meter assembly connector.
(d) Measure the voltage according to the value(s) in the table below.
If the result is not as specified, the combination meter assembly may have a malfunction.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.