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:
PBD Pulse Sensor Malfunction
DTC B2222 PBD Pulse Sensor Malfunction
DESCRIPTION
A pulse sensor is built into the back door for a jam and foreign
object detection and for back door
position detection. The jam and foreign object detection feature of the
pulse sensor monitors the
operating speed of the back door whi ...
Diagnostic trouble code chart
HINT:
If a malfunction code is displayed during the DTC check,
check the circuit indicated by the DTC. For details of each
code, turn to the page for the respective "DTC Code" in the
DTC chart.
DTC chart of ABS:
DTC chart of VSC:
...
Steering Pad Switch Circuit
DESCRIPTION
This circuit sends an operation signal from the steering pad switch to the
radio receiver.
If there is an open in the circuit, the navigation system cannot be operated
using the steering pad switch.
If there is a short in the circuit, the resulting condition is the same as if ...
