Lexus IS250 IS220d GSE20 ALE20 - PRE-CRASH SAFETY
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)
PRE-CRASH SAFETY SYSTEM - Power Source Circuit
DESCRIPTION
This circuit supplies power to the seat belt control ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed .
| 1.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
Disconnect the negative (-) terminal cable from the battery.
Disconnect the O38 seat belt control ECU connector.
Connect the negative (-) terminal cable to the battery.
Measure the voltage according to the value (s) in the table below.
- Standard voltage:
Tester Connection Condition Specified Condition O38-3 (IG1) - Body ground Engine switch off Below 1 V Engine switch on (IG) 10 to 14 V O38-9 (+B) - Body ground Always 10 to 14 V
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) |
Disconnect the negative (-) terminal cable from the battery.
Measure the resistance according to the value (s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition O38-18 (PGND) - Body ground Always Below 1 Ω
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| OK | ||
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LEXUS IS250, IS220d / GSE20 ALE20