Toyota RAV4 manuals

Toyota RAV4 (XA40) 2013-2018 Service Manual: Back-up power source circuit

Description

This is the back-up power source circuit for the air conditioning amplifier. Power is supplied even when the ignition switch is turned off and is used for functions such as the diagnostic trouble code memory.

wiring diagram

Toyota RAV4. Back-up power source circuit


Inspection procedure

  1. Inspect fuse (ecu-b2)

  1. Remove the ecu-b2 fuse from the engine room no. 2 Relay block.
  2. Measure the resistance of the fuse.

Standard resistance: below 1




  1. Check wire harness (air conditioning amplifier - battery)

Toyota RAV4. Check wire harness (air conditioning amplifier - battery)


  1. Disconnect the e37 amplifier connector.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




  1. Check wire harness (air conditioning amplifier - body ground)

Toyota RAV4. Check wire harness (air conditioning amplifier - body ground)


  1. Disconnect the e37 amplifier connector.
  2. Measure the resistance of the wire harness side connector.

Standard resistance




Proceed to next circuit inspection shown in problem symptoms table

Ig power source circuit
Description This is the main power source supplied to the air conditioning amplifier when the ignition switch is on (ig). This power source is used for operating components, such as the air cond ...

Air conditioning system (for manual air conditioning system)
...

Other materials:

Installation
Hint: A bolt without a torque specification is shown in the standard bolt chart (see page ss-2). Install front seat inner belt assembly (for power seat) Install the front seat inner belt assembly with the nut. Torque: 42 n*m (428 kgf*cm, 31 ft.*Lbf) Notice: Do not overlap the ...

Air conditioning control panel does not operate
Description This circuit consists of the air conditioning control and the air conditioning amplifier. When the air conditioning control is operated, signals are transmitted to the air conditioning amplifier through the lin communication system. If the lin communication system malfunctions, ...

Diagnostic trouble code chart
Hint: If any dtcs are displayed during the dtc check, inspect the circuit listed for these dtcs. For details of each dtc, refer to the page indicated in the dtc chart. Hint: : Warning light comes on X: warning light turns off (normal reset) ...

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