Inspection Procedure

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WIRE HARNESS (MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND)

Disconnect the P22 connector.

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

Standard voltage

MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND - VOLTAGE

Tester Connection	Condition	Specified Condition
P22-9 (CPUB) - Body ground	Always	10 to 14 V
P22-10 (BDR) - Body ground	Always	10 to 14 V
P22-20 (SIG) - Body ground	Ignition switch ON	10 to 14 V

Standard resistance

MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND - RESISTANCE

Tester Connection	Condition	Specified Condition
P22-2 (GND) - Body ground	Always	Below 1 Ω

Fig 1: Checking Wire Harness (Multiplex Network Master Switch - Battery And Body Ground)

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : PROCEED TO NEXT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE