Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

Inspect POWER and J/B M-fuses and ECU-B fuse.
PREPARATION:
1. Remove the M-fuses from the engine room relay block and driver side J/B.
2. Remove the fuse from the engine room relay block.
CHECK:

Check the continuity.

OK:

Continuity
1. NG : Replace M-fuse and/or fuse.
2. OK : Go to next step.
Check voltage between terminals +B1, +B2 and E1 of TVIP ECU.
PREPARATION:

Disconnect the T11 and T12 TVIP ECU connectors.

CHECK:

Check the voltage between the wire harness side connectors.

Fig 1: Checking Voltage Between Terminals +B1, +B2 And E1 And TVIP ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:

Fig 2: +B1, +B2 And E1 And TVIP ECU Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : Repair or replace harness and connector.
2. OK : Replace TVIP ECU.