Toyota Sienna Service Manual: Diagnosis system
1. DESCRIPTION
- Front power seat control system data can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.
2. CHECK DLC3
- The vehicle uses ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the wire harness and connector.
HINT: Connect the cable of the intelligent tester to the DLC3, turn the ignition switch on and attempt to use the tester. If the screen displays a communication error message, a problem exists on the vehicle side or the tester side.
- If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
- If communication is still not possible when the tester is connected to another vehicle, the problem is probably in the tester itself. Consult the Service Department listed in the tester's instruction manual.
3. INSPECT BATTERY VOLTAGE
- Check the battery voltage.
Voltage: 11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
Terminals of ECU
1. POSITION CONTROL ECU AND SWITCH ASSEMBLY
(POWER SEAT CONTROL SWITCH AND ECU)
Disconnect the P58 and P59 connectors.
Check the voltage of each terminal of the wire
harness sid ...
Data list / active test
1. DATA LIST
HINT:
Using the intelligent tester's DATA LIST allows the status
of a switch, sensor, actuator and other items to be read
without removing any parts. Reading the DATA LIST
early in t ...
Other materials:
Disassembly
1. Remove oil filler cap sub-assembly
(A) remove the oil filler cap sub-assembly and oil filler
gasket.
2. REMOVE SPARK PLUG
(a) Remove the spark plugs.
3. REMOVE OIL PAN DRAIN PLUG
(a) Remove the oil pan drain plug and oil pan drain plug
gasket.
4. REMOVE VENTILATION VALVE SUB-ASSEMBLY
...
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.
NOTICE:
*: Before measuring the resistance, leave the
vehicle as is for at least 1 minute and do not
...
Removal
1. REMOVE FRONT WHEELS
2. REMOVE FRONT STABILIZER LINK ASSEMBLY LH
HINT:
(See page SP-26)
3. REMOVE FRONT STABILIZER LINK ASSEMBLY RH
HINT:
Remove the RH side by the same procedures as the LH
side.
4. REMOVE CENTER EXHAUST PIPE ASSEMBLY
HINT:
(See page EX-8)
5. REMOVE NO. 1 FRONT STABILIZ ...
