Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT:
- Use this procedure to troubleshoot the engine immobiliser system.
- The intelligent tester should be used in steps 4, 5 and 7.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
3 CRANK ENGINE FOR MORE THAN 10 SECONDS
4 CHECK FOR DTC
- Check for DTCs and note any codes that are output.
- Delete the DTC.
- Recheck for DTCs. Try to prompt the DTC (SFI system and engine immobiliser system) by simulating the original activity that the DTC suggested.
- If the DTC does not reoccur, proceed to A.
- If the DTC (SFI system) reoccurs, proceed to B.
- If the DTC (engine immobiliser system) reoccurs, proceed to C.
5 READ VALUE OF INTELLIGENT TESTER ((IMMOBILISER ECU (TRANSPONDER KEY ECU ASSEMBLY) (SWITCH CONDITION))
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch ON and push the intelligent tester main switch ON.
- Select the item KEY SW in the DATA LIST and read its value displayed on the intelligent tester.
Transponder key ECU
6 PROBLEM SYMPTOMS TABLE
- If the fault is not listed on the problem symptoms table, proceed to A.
- If the fault is listed on the problem symptoms table, proceed to B
7 OVERALL ANALYSIS AND TROUBLESHOOTING
- Inspection with the intelligent tester (ECU DATA MONITOR).
- Inspection with the intelligent tester (ACTIVE TEST).
- Terminals of ECU
8 ADJUST, REPAIR OR REPLACE
9 CONFIRMATION TEST
END
Engine immobiliser system
PARTS LOCATION
SYSTEM DESCRIPTION
The engine immobiliser system has been designed to prevent
the vehicle from being stolen. This system uses a
transponder key ECU that stores the key code of t ...
Registration
1. DESCRIPTION OF CODE REGISTRATION
HINT:
The key has 2 codes: The key code (immobiliser code)
and the wireless code. Both of these codes need to be
registered. Refer to page for the wireless code ...
Other materials:
Brake Switch
DESCRIPTION
The stop light switch is a duplex system that transmits two signals: STP and
ST1-. These two signals are
used by the ECM to monitor whether or not the brake system is working properly.
If the signals, which
indicate the brake pedal is being depressed or released, are detected ...
Assist grips
Type A
An assist grip installed on the ceiling
can be used to support your
body while sitting on the seat.
Type B
An assist grip installed on the pillar
can be used when getting in
or out of the vehicle and others.
WARNING
Type A: Do not use the assist grip when g ...
Steering Angle Sensor Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Steering Angle Sensor
Communication Stop
Mode
"Steering angle sensor" is not displayed on the
"Communication Bus Check" screen of the
intelligent tester
Applies to &qu ...