Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FRONT NO. 1 SPEAKER ASSY
1. Disconnect the speaker connector.
2. Resistance check.
  1. Measure the resistance between the terminals of the speaker.
NOTE: The speaker should not be removed for checking.

Standard: 3 to 4 Ω

Fig 1: Terminals Resistance Reference Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Checking Harness And Connector (Navigation ECU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Checking Harness And Connector (Front No 1 Speaker Assy)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FRONT NO. 1 SPEAKER ASSY (SEE REPLACEMENT )

OK: Go to next step.
CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSY - NAVIGATION ECU)
1. Disconnect the connector from navigation ECU N4 and front No.1 speaker assy F6.
2. Measure the resistance according to the value (s) in the figure Figure below.
  Standard:
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE NAVIGATION ECU (SEE REPLACEMENT )