Toyota Sienna Service Manual: 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 J/B.
- Measure the resistance.
Standard resistance: Below 1 Ω
2 CHECK INSTRUMENT PANEL J/B ASSEMBLY (POWER SOURCE)
- Disconnect the 1C J/B connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
3 CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - BODY GROUND)
- Disconnect the 1K and 1L J/B connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE INSTRUMENT PANEL J/B ASSEMBLY
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 continuou ...
Engine hood courtesy
switch
Inspection
1. INSPECT ENGINE HOOD COURTESY SWITCH
Measure the resistance according to the value(s) in
the table below.
Standard resistance
If the result is not as specified, r ...
Other materials:
Pressure Sensor Circuit
DTC B1423/23 Pressure Sensor Circuit
DESCRIPTION
This DTC is output when refrigerant pressure on the high pressure side is
extremely low (0.19 MPa (2.0
kgf/cm2, 28 psi) or less) or extremely high (3.14 MPa (32.0 kgf/cm2, 455 psi) or
more). The pressure
sensor, which is installed on the pipe ...
Removal
1. REMOVE ENGINE ASSEMBLY WITH TRANSAXLE
HINT:
See page EM-26
2. SECURE ENGINE (See page EM-37)
3. REMOVE GENERATOR ASSEMBLY (See page CH-17)
4. REMOVE COMPRESSOR AND MAGNETIC CLUTCH
(See page AC-227)
5. REMOVE NO. 1 ENGINE FRONT MOUNTING
BRACKET LH (See page EM-42)
6. REMOVE NO. 2 IDLER PU ...
Inspection
1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
Resistance inspection
Using an ohmmeter, measure the resistance
between the terminals.
Resistance:
6.9 to 7.9 Ω at 20C (68F)
If necessary, replace the camshaft timing oil
control valve assembly.
&nbs ...
