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:
Installation
1. INSTALL STEERING PAD
Support the steering pad with one hand as shown in
the illustration.
Connect the 2 connectors to the steering pad.
NOTICE:
When handling the airbag connector, take care
not to damage the airbag wire harness.
Connect the horn connector.
...
Reassembly
1. APPLY HIGH TEMPERATURE GREASE
(a) Apply the high temperature grease to the surface on
which the shoe and backing plate attach.
2. INSTALL PARKING BRAKE SHOE LEVER LH
(a) Install the shoe lever and shim to the rear shoe with
a new C-washer.
(b) Using a feeler gauge, measure the clearance.
...
Access monitor result
(A) select the following menus on the intelligent tester:
diagnosis, enhanced obdii, monitor info
and monitor result. The monitor status
appears after the component name.
INCMP: The component has not been monitored
yet.
PASS: The component is functioning normally.
FAIL: The component is ...