Toyota Sienna Service Manual: 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 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.
2. MULTIPLEX NETWORK BODY ECU
- Disconnect the B7 ECU, 1A, 1C, 1E, 1K and 1L junction block connectors
- 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 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.
3. AIRBAG SENSOR ASSEMBLY
- Disconnect the A21 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 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.
4. SEAT POSITION CONTROL ECU (with Driving Position Memory)
- Disconnect the P58 and P59 ECU connectors.
- 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 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.
5. AIR CONDITIONING AMPLIFIER
- Disconnect the A9 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 the specified terminals on the wire harness side connector.
HINT:
*1: for Automatic A/C
*2: for Manual A/C
If the result is not as specified, there may be a malfunction on the wire harness side.
6. COMBINATION METER
- Disconnect the C10 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 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.
7. POWER SLIDE DOOR ECU RH
- Disconnect the P27 and P28 ECU connectors.
- 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 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.
8. POWER SLIDE DOOR ECU LH
- Disconnect the P25 and P26 ECU connectors.
- 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 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.
9. POWER BACK DOOR ECU
- Disconnect the P13 and P14 ECU connectors.
- 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 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.
10. OUTER MIRROR CONTROL ECU RH (with Driving Position Memory)
- Disconnect the O11 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 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.
11. OUTER MIRROR CONTROL ECU LH (with Driving Position Memory)
- Disconnect the O9 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 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.
How to proceed with
troubleshooting
HINT:
Troubleshoot in accordance with the procedures on the
following pages.
1 VEHICLE BROUGHT TO WORKSHOP
2 DTC CHECK
Check for DTCs and make a note of the code that is
output (See page MP- ...
DTC check / clear
1. CHECK DTC
Prepare the intelligent tester.
Connect the intelligent tester to DLC3.
Turn the ignition switch to the ON position and turn
the intelligent tester main switch ON.
Use the i ...
Other materials:
Meter Illumination does not Dim at Night
DESCRIPTION
Confirm that the vehicle is equipped with the optitron meter, then
check this circuit.
The combination meter assembly receives a auto dimmer signal from
the body ECU by the multiplex
communication line.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK MULTIP ...
Fuel pump resistor
Components
REMOVAL
1. REMOVE FUEL PUMP RESISTOR
(a) Disconnect the connector.
(b) Remove the nut and fuel pump resistor.
INSPECTION
1. INSPECT FUEL PUMP RESISTOR
(a) Inspect fuel pump resistor.
(1) Using an ohmmeter, measure the resistance
between the terminals.
Standard resi ...
Open in One Side of CAN Branch Line
DESCRIPTION
If 2 or more ECUs and/or sensors do not appear on the intelligent tester
"Communication Bus Check"
screen, one side of the CAN branch wire may be open. (One side of the CAN-H
[branch wire] / CAN-L
[branch wire] of the ECU and/or sensor is open.)
Symptom
...
