Toyota Sienna Service Manual: Security Indicator Light Circuit
DESCRIPTION
Even when the theft deterrent system is in the disarmed state, the security indicator blinks due to a signal output from the immobiliser system. The security indicator blinks continuously due to a continuous signal received from the immobiliser system while in the armed state.
The multiplex network body ECU causes the security indicator to light up or blink only during the arming preparation state and alarm sounding states.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT COMBINATION METER ASSEMBLY
- Remove the combination meter assembly.
- Apply battery voltage between the terminals of the indicator, and check the lighting condition of the security indicator.
Standard
NOTICE:
- If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator will not light up.
- Voltage of more than 12 V will damage the security indicator
- If the voltage is too low, the security indicator will not light up.
2 CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - MULTIPLEX NETWORK BODY ECU)
- Disconnect the B6 ECU connector.
- Disconnect the C10 meter connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 CHECK HARNESS AND CONNECTOR (COMBINATION METER - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE MULTIPLEX NETWORK BODY ECU
Ignition Switch Circuit
DESCRIPTION
When the ignition switch is turned to the ON position, battery positive
voltage is applied to terminal IG of
the ECU. When battery positive voltage is applied to terminal IG of the ECU ...
ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the theft deterrent (warning) ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT FUSE (ECU-B)
Remove the ECU-B fuse from the engine room ...
Other materials:
Problem symptoms table
HINT:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspect Area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed ...
Disassembly
1. INSPECT OIL PUMP ASSEMBLY
HINT:
(See page AX-234)
2. REMOVE CLUTCH DRUM OIL SEAL RING
(a) Remove the 2 clutch drum oil seal rings.
3. REMOVE STATOR SHAFT ASSEMBLY
(a) Using a "torx" socket (T30), remove the 11 bolts and
stator shaft.
4. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY ...
Do-it-yourself service
precautions
If you perform maintenance yourself, be sure to follow the correct
procedure as given in these sections.
Items
Parts and tools
Battery condition
Warm water
Baking soda
Grease
Conventional wrench (for terminal clamp bolts)
Brake ...
