Overhead Junction Block: Inspection

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 Overhead Junction Block Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Overhead Junction Block Connector Terminal Legend
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Overhead J/B side:

INSPECT OVERHEAD JUNCTION BLOCK ASSEMBLY

Fig 3: Identifying Overhead Junction Block Connector Terminals - Over Head J/B Side

G02994012

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TESTER CONNECTION SPECIFIED CONDITION

Circuit name	Tester connection	Specified condition
Power source circuit	A8-B6-E6	Continuity
Power source circuit	A11-B8-G1	Continuity
Ground circuit	A1-B2-E8-D3-F1	Continuity
Microphone circuit	A2-B10-G4	Continuity
Microphone circuit	A3-B9-G2	Continuity
Mayday switch circuit	A13-B7-F4	Continuity
Mayday switch circuit	A7-B4-F3	Continuity
Mayday switch circuit	A14-B3-F12	Continuity

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