Toyota Sienna Service Manual: 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 and repair or replace problem parts.
5 DTC CLEAR
- Clear the DTCs and finish the diagnostic mode.
HINT: The currently output DTCs may not indicate actual malfunctions depending on the vehicle conditions.
6 RECHECK DTC
HINT:
- If the system cannot enter the diagnosis mode, inspect the AVC-LAN and all the components that connect to the AVCLAN for short circuits.
- Even if the malfunction symptom is not confirmed, check for diagnostic trouble codes. This is because the system stores past diagnostic trouble codes.
- Refer to the detailed description on the diagnostic screen, as necessary.
- Check the diagnostic trouble code and inspect the area the code indicates.
7 DIAGNOSTIC TROUBLE CODE CHART
- Find the output code on the diagnostic trouble code chart.
8 PROBLEM SYMPTOMS TABLE
- Find the applicable symptom code in the problem symptoms table.
HINT: If the symptom does not recur and no code is output, perform the symptom reproduction method
9 CHECK THE ECU TERMINAL ARRANGEMENT BASED ON THE MALFUNCTION SYMPTOM
10 CHECK THE CIRCUIT
- Adjust, repair, or replace as necessary.
11 RECHECK THE DIAGNOSTIC TROUBLE CODE
HINT: After deleting the DTCs, recheck for diagnostic trouble codes.
12 PERFORM CONFIRMATION TEST
END
System description
1. Radio and navigation assembly outline
Conventionally, 2 separate devices, a "radio and
display" and a "navigation ECU" are used. This
model has adopted a new type, ...
Identification of noise source
1. Radio Description
Radio frequency band
Radio broadcasts use the radio frequency bands
shown in the table below
Service area
The service areas of AM and FM broa ...
Other materials:
Brake control
Sst
Recommended tools
HINT:
Torx is a registered trademark of Textron Inc.
EQUIPMENT
LUBRICANT
BRAKE
SST
RECOMMENDED TOOLS
EQUIPMENT
LUBRICANT
PARKING BRAKE
EQUIPMENT
STEERING COLUMN
SST
EQUIPMENT
...
Diagnosis system
1. CHECK DLC3
(a) The vehicle's ECM uses the ISO 15765-4 for
communication. The terminal arrangement of the
DLC3 complies with SAE J1962 and matches the
ISO 15765-4 format.
HINT:
Connect the cable of the intelligent tester to the
DLC3, turn the ignition switch to the ON position
and atte ...
Oxygen (A/F) Sensor Heater Control Circuit
HINT
Although the DTC titles say the oxygen sensor, these DTCs relate to the
Air-Fuel Ratio (A/F) sensor.
Sensor 1 refers to the sensor mounted in front of the Three-Way
Catalytic Converter (TWC) and
located near the engine assembly.
DESCRIPTION
Refer to DTC P2195 (See page ES- ...
