Toyota RAV4 manuals

Toyota Sienna Service Manual: Clearance Warning ECU Power Source Circuit

DESCRIPTION

This circuit provides power to the clearance warning ECU.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - AIR CONDITIONER AMPLIFIER)

CHECK HARNESS AND CONNECTOR

  1. Disconnect the connectors from the clearance warning ECU C9 and air conditioner amplifier connector A10 or A11.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

2 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BODY GROUND)

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BODY GROUND)

  1. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

3 INSPECT CLEARANCE WARNING ECU

INSPECT CLEARANCE WARNING ECU

  1. Disconnect the clearance warning ECU connector.
  2.  Turn the ignition switch ON.
  3.  Turn the clearance sonar main switch ON.
  4.  Measure the voltage between terminals +B and E of the ECU.

Standard voltage: 10 to 14 V

Result

Result

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

4 INSPECT PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY

  1. 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

  1. 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:

Installation
1. INSTALL HEATED OXYGEN SENSOR (for Bank 2 Sensor 2) (a) Using SST, install the heated oxygen sensor to the front exhaust pipe. SST 09224-00010 Torque: 40 N*m (408 kgf*cm, 30 ft.*lbf) for use with SST 44 N*m (449 kgf*cm, 32 ft.*lbf) for use without SST HINT: Use a torque wrench wit ...

Meter Illumination is Always Dark
DESCRIPTION  Confirm that the vehicle is equipped with the optitron meter, then check this circuit. The combination meter assembly receives a auto dimmer signal from the body ECU by the multiplex communication line. WIRING DIAGRAM INSPECTION PROCEDURE 1 CHECK MULTIPLEX CO ...

Removal
1. REMOVE FRONT DOOR OPENING TRIM WEATHERSTRIP LH 2. REMOVE FRONT DOOR OPENING TRIM WEATHERSTRIP RH 3. REMOVE FRONT PILLAR GARNISH LH 4. REMOVE FRONT PILLAR GARNISH RH 5. REMOVE VISOR ASSEMBLY LH 6. REMOVE VISOR ASSEMBLY RH 7. REMOVE ASSIST GRIP SUB-ASSEMBLY (2) 8. REMOVE VISOR HOLDER (1) ...

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