Section 547 (Overhead Junction Block): Inspection

WARNING: This page is about a different car, the 2005 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT OVERHEAD JUNCTION BLOCK ASSEMBLY

Disconnect the connector from the overhead J/B and inspect the connector on the wire harness side, as shown.

Fig 1: Identifying Wire Harness Side Terminal Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
1 - Ground	Constant	Continuity
8 - Ground	Constant	Battery positive voltage
11 - Ground	Ignition switch OFF or ACC	No voltage
11 - Ground	Ignition switch ON	Battery positive voltage

If continuity is not as specified, repair or replace the wire harness.

Overhead J/B side:

INSPECT OVERHEAD JUNCTION BLOCK ASSEMBLY

Fig 2: Identifying Overhead J/B Side

TESTER CONNECTION SPECIFIED CONDITION

Circuit name	Tester connection	Specified condition
Power source circuit	A8 - B6 - E6	Continuity
Ground circuit	A1 - B2 - E8 - D3	Continuity
Microphone circuit	B10 - G4	Continuity
Microphone circuit	B9 - G2	Continuity

If continuity is not as specified, replace the overhead J/B assembly.