Toyota Sienna Service Manual: Clearance Warning ECU Power Source Circuit
DESCRIPTION
This circuit provides power to the clearance warning ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - AIR CONDITIONER AMPLIFIER)
- Disconnect the connectors from the clearance warning ECU C9 and air conditioner amplifier connector A10 or A11.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
2 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 INSPECT CLEARANCE WARNING ECU
- Disconnect the clearance warning ECU connector.
- Turn the ignition switch ON.
- Turn the clearance sonar main switch ON.
- Measure the voltage between terminals +B and E of the ECU.
Standard voltage: 10 to 14 V
Result
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4 INSPECT PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
- Check that the malfunction disappears when a known good printed wire integration board sub-assembly is installed.
OK: Malfunction disappears
REPLACE PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
5 INSPECT INTEGRATION PANEL SUB-ASSEMBLY
- Check that the malfunction disappears when a known good integration panel sub-assembly is installed.
OK: Malfunction disappears.
REPLACE INTEGRATION PANEL SUB-ASSEMBLY
No. 1 Clearance Warning Buzzer Circuit
DESCRIPTION
The clearance warning ECU receives the ultrasonic sensor signal to sound the
front warning buzzer.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT FRONT BUZZER
Remove the c ...
No. 2 Clearance Warning Buzzer Circuit
DESCRIPTION
The clearance warning ECU receives the ultrasonic sensor signal to sound the
rear warning buzzer.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (CLEARANCE WAR ...
Other materials:
Wiper and washer system
PRECAUTION
1. PRECAUTION OF WASHER NOZZLE ADJUSTMENT
Do not clean or adjust the washer nozzle with a
safety pin, etc. because;
the washer nozzle tip is made of resin and could
be damaged.
adjustment is not necessary because the
washer nozzle is a spray type.
...
Check mode procedure
1. CHECK MODE (SIGNAL CHECK): DTC CHECK
Connect the intelligent tester to the DLC3.
) Turn the ignition switch to the ON position.
) Select the "SIGNAL CHECK", and proceed
checking using the intelligent tester.
NOTICE:
Select the "SIGNAL CHECK" from the &q ...
Shift Solenoid "E" Performance (Shift Solenoid
Valve SR)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear
position (1st, 2nd, 3rd, 4th
or 5th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory
to detect mechanical
problems of the shift solenoid valves, valve b ...
