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.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER)

Disconnect the P33 certification ECU (smart key ECU assembly) connector and P31 door control receiver connector

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
P33-39 (RSSI) - P31-5 (RSSI)	Always	Below 1 Ω
P33-38 (RDA) - P31-3 (DATA)	Always	Below 1 Ω
P33-39 (RSSI) - P33-38 (RDA)	Always	10 kΩ or higher
P33-39 (RSSI) - Body ground	Always	10 kΩ or higher
P33-38 (RDA) - Body ground	Always	10 kΩ or higher

Fig 1: Identifying P33 And P31 Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

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

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
P33-39 (RSSI) - P33-17 (E)	Engine switch OFF, all doors closed, the electrical key not in the actuation area	11 to 14 V
P33-39 (RSSI) - P33-17 (E)	Engine switch OFF, all doors closed, the electrical key in the actuation area	Below 1 V
P33-38 (RDA) - P33-17 (E)	Engine switch OFF, all doors closed, transmitter switch not pressed	11 to 14 V
P33-38 (RDA) - P33-17 (E)	Engine switch OFF, all doors closed, transmitter switch pressed	Below 1 V

Fig 2: Identifying P33 Connector Terminals

NG: REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (See REMOVAL )

OK: REPLACE DOOR CONTROL RECEIVER (See REMOVAL )