Lexus IS250 IS220d GSE20 ALE20 - DOOR LOCK
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
ENTRY AND START SYSTEM - Certification ECU Power Source Circuit
DESCRIPTION
This is the power source circuit of the certification ECU.
The certification ECU controls the following:
Electrical key verification confirmation
Cabin and door oscillator control
Entry door LOCK / UNLOCK request to the main body ECU RH
Steering LOCK / UNLOCK request
Immobilizer SET / UNSET request to the ID code box
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
Disconnect the P33 certification ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection (Symbols) Condition Specified Condition P33-1 (+B1) - Body ground Always 10 to 14 V P33-18 (IG) - Body ground Engine switch OFF Below 1 V Engine switch ON (IG) 10 to 14 V P33-19 (ACC) - Body ground Engine switch OFF Below 1 V Engine switch ON (ACC) 10 to 14 V
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection (Symbols) Condition Specified Condition P33-17 (E) - Body ground Always Below 1 Ω
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| OK | ||
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