Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When the seat belt control ECU is replaced with a new one, Initialization must be performed (See INITIALIZATION ).

INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH

Disconnect the P8 connector of the front seat outer belt assembly RH

Measure the resistance according to the value (s) in the table below

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
P8-1 - P8-2	Always	Below 1 MΩ

Fig 1: Identifying P8 Connector Terminal

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NG: REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH (See COMPONENTS )

OK: Go to next Step

CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)

Disconnect the cable from the negative (-) battery terminal
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See INITIALIZATION ).
Disconnect the Q38 connector of the seat belt control ECU.
Using SST, connect P8-1 and P8-2 of the wire harness connector for the front seat outer belt assembly RH.
NOTE: Do not forcibly insert SST into the terminals of the connector.

SST 09843-18040

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
Q38-1 (MOR+) - Q38-10 (MOR-)	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying Q8 Seat Belt Control ECU And P8 Connector Terminal

OK: REPLACE SEAT BELT CONTROL ECU (See SEAT BELT CONTROL ECU )