Toyota RAV4 manuals

Toyota RAV4 (XA40) 2013-2018 Service Manual: Low battery positive voltage

Toyota RAV4. Low battery positive voltage


Description

When there is an abnormality in the power supply circuit of the brake actuator (skid control ecu), the skid control ecu sets a dtc and the operation is prohibited by the fail-safe function. This dtc is set when the voltage supplied to terminal ig1 is outside the dtc detection threshold, due to abnormalities of the battery, power source circuits or charging circuits such as the alternator circuit.

The fail-safe function is canceled when the voltage to terminal ig1 returns to normal.

Toyota RAV4. Low battery positive voltage


Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

  1. Inspect fuse (ecu-ig1)

  1. Remove the ecu-ig1 fuse from the instrument panel junction block.
  2. Measure the resistance of the fuse.

Standard resistance: below 1




  1. Inspect battery

  1. Check the battery voltage.

Standard voltage: 11 to 14 v



  1. Check wire harness (skid control ecu - battery)

Toyota RAV4. Check wire harness (skid control ecu - battery)


  1. Disconnect the a19 ecu connector.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




  1. Check wire harness (skid control ecu - body ground)

Toyota RAV4. Check wire harness (skid control ecu - body ground)


  1. Disconnect the a19 ecu connector.
  2. Measure the resistance of the wire harness side connector.

Standard resistance 




  1. Reconfirm dtc

  1. Clear the dtc (see page bc-47).
  2. Drive the vehicle at 3 km/h (2 mph) or more for several seconds.
  3. Check if the same dtc is output (see page bc-47).

Result




Replace abs and traction actuator assembly

Stuck in deceleration sensor
Description The skid control ecu receives signals from the yaw rate and deceleration sensor via the can communication system. The yaw rate sensor has a built-in deceleration sensor and dete ...

Master cylinder pressure sensor malfunction
Description The master cylinder pressure sensor is connected to the skid control ecu in the abs and traction actuator. Dtc c1281/81 can be detected when the master cylinder pressure sensor ...

Other materials:

Shift solenoid "d" control circuit
Description Shifting from 1st to o/d is performed in combination with the on and off operation of the shift solenoid valves sl1 and sl2, which are controlled by the ecm. If an open or short circuit occurs in any of the shift solenoid valves, the ecm controls the remaining normal shift sol ...

Driver side seat belt warning light does not operate
Description When the ignition switch is on, the center airbag sensor transmits front seat inner belt status signals to the combination meter through the can bus line. If the driver seat belt is not fastened, the combination meter blinks the driver side seat belt warning light. If the seat bel ...

Unmatched encryption code
Description This dtc is output when a key with an incomplete key code is inserted into the ignition key cylinder. Inspection procedure Reregister key Clear the dtc (see page ei-18). Reregister the key code with the transponder key ecu (see page ei-5) Check that the engine ...

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