Toyota Sienna Service Manual: Terminals of ECU

1. CHECK DRIVER SIDE J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)

1.  Disconnect the 1C, 1J, 1L, 1K, 1P, B6, B7 and B9 J/ B connectors.

2. Measure the voltage and resistance according to the value(s) in the table below.

Standard

HINT:

•  If the result is not as specified, there may be a malfunction on the wire harness side.
•  *1: w/o Power back door

3. Reconnect the J/B and ECU connectors and measure the voltage according to the value(s) in the table below.

Standard voltage

HINT:

•  *1: w/o Power Back Door
•  Use an oscilloscope to check the output voltages of terminals LSWD, LSWP, LSWL and LSWR.
•  If the result is not as specified, the J/B (body ECU) may have a malfunction.

2. CHECK POWER BACK DOOR ECU (w/ Power back door system)

1. Disconnect the P13 and P14 ECU connectors.

2. Measure the voltage and resistance according to the value(s) in the table below.

Standard

HINT: If the result is not as specified, there may be a malfunction on the wire harness side.

3.  Reconnect the ECU connectors and measure the voltage according to the value(s) in the table below.

Standard voltage

HINT: If the result is not as specified, the ECU may have a malfunction.