Toyota RAV4 manuals

Toyota Sienna Service Manual: Distance Control ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the distance control ECU. The distance control ECU determines information about the vehicle in front based on data from the laser sensor, and then decides how much acceleration and/or deceleration is needed to maintain the set distance. The distance control ECU also requests the skid control ECU to apply braking and to sound the buzzer.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK HARNESS AND CONNECTOR

 CHECK HARNESS AND CONNECTOR

  1. Disconnect the D2 distance control ECU connector.
  2.  Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

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

Standard resistance

Standard resistance

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Cruise Control Switch Circuit
DESCRIPTION The cruise control main switch operates 8 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP, CANCEL, and MODE. The SET, TAP-DOWN, and - (COAST) functions, and the ...

Distance Control Switch Circuit
DESCRIPTION The distance control switch sets the vehicle-to-vehicle distance mode. The distance control switch is installed in the steering pad switch. The vehicle-to-vehicle distance set value ...

Other materials:

How to proceed with troubleshooting
HINT:  Use the following procedures to troubleshoot the cruise control system.  *: Use the intelligent tester. 1 VEHICLE BROUGHT TO WORKSHOP 2 PROBLEM SYMPTOM CONFIRMATION 3 CHECK MULTIPLEX COMMUNICATION SYSTEM* Refer to HOW TO PROCEED WITH TROUBLESHOOTING.  Check fo ...

VC Output Circuit
DESCRIPTION The ECM constantly uses 5 V from the battery voltages supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit. When the VC circuit is short-circuited, the microprocessor in the ECM and sens ...

Display check mode
HINT:  This mode checks the color display on the display.  Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle. 1. ENTER DIAGNOSTIC MODE 2. D ...

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