Toyota Sienna Service Manual: Terminals of ECU
1. CHECK DRIVER SIDE J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)
- Disconnect the 1C, 1J, 1L, 1K, 1P, B6, B7 and B9 J/ B connectors.
- 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
- 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)
- Disconnect the P13 and P14 ECU connectors.
- 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.
- 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.
Problem symptoms table
HINT:
Inspect the fuse and relay before investigating the suspected
areas shown in the table below.
POWER DOOR LOCK CONTROL SYSTEM
...
Diagnosis system
1. CHECK DLC3
The vehicle's ECU uses ISO 15765-4 for
communication protocol. The terminal arrangement
of the DLC3 complies with SAE J1962 and matches
the ISO 15765-4 format.
...
Other materials:
Installation
1. INSTALL PROPELLER W/CENTER BEARING SHAFT ASSEMBLY
(a) Align the matchmarks on the propeller shaft
assembly rear flange and differential companion
flange, and connect the shaft with the 4 bolts,
washers and nuts.
(b) Remove SST(s) from the extension housing.
(c) Insert the yoke int ...
How to proceed with
troubleshooting
1 VEHICLE BROUGHT INTO A WORKSHOP
2 DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION
Ask the customer about symptoms and confirm
malfunctions.
3 CONFIRM THE SYSTEM NORMAL CONDITION
4 CHECK DTC
HINT:
If the system cannot enter the diagnosis mode, inspect each
AVC-LAN communication signal ...
Terminals of ECU
1. MULTIPLEX NETWORK GATEWAY ECU
Disconnect the G4 ECU connector.
Measure the voltage between the specified
terminals on the wire harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
Measure the resistance between ...
