Inspection Procedure

WARNING: This page is about a different car, the 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Check combination meter ECU.
CHECK:

Start the engine and check that the speed meter and tachometer operate normally.

NOTE: With this inspection, the combination meter ECU CPU can be diagnosed if it works normally or not.
1. NG : Replace the combination meter ECU.
2. OK : Go to Next Step
Check wire harness
PREPARATION:

Disconnect the connector "B11" of back door ECU, "C6" of combination meter ECU "B7" of body ECU.

CHECK:
1. Check continuity between terminals MPX1 of back door ECU and MPX2 of combination meter ECU.
2. Check continuity between terminals MPX1 of combination meter and MPX2 of body ECU.
OK:

There is a continuity in wire harness of both (a) and (b), or either (a) or (b).

NOTE: If there is open in wire harness of either (a) or (b), please repair it.
1. NG : Repair or replace wire harness.
2. OK : Replace the combination meter ECU.