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:
High pitched horn
COMPONENTS
REMOVAL
1. REMOVE FRONT BUMPER COVER
2. REMOVE HIGH PITCHED HORN
Disconnect the connector.
Remove the bolt and horn.
INSPECTION
1. INSPECT HIGH PITCHED HORN
Apply battery voltage and check operation of the
horn, as shown in the table.
Standard ...
Disassembly
1. Remove rear wheel
2. Drain brake fluid
Notice:
wash the brake fluid off immediately if it attaches to
any painted surface.
3. REMOVE REAR BRAKE DRUM SUB-ASSEMBLY
(a) Release the parking brake lever, and remove the
rear brake drum.
HINT:
If the rear brake drum cannot be removed easily,
p ...
Power Seat ECU Communication Stop
DTC B1272 Power Seat ECU Communication Stop
DESCRIPTION
This DTC is detected when communication between the seat position control ECU
and the multiplex
network gateway ECU stops for more than 10 seconds.
DTC No.
DTC Detection Condition
Trouble Area
B1272
...
