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:

Air mix damper control servo motor circuit (passenger side)
Description The air mix damper servo sends pulse signals to indicate the damper position to the air conditioning amplifier. The air conditioning amplifier activates the motor (normal or reverse) based on these signals to move the air mix damper (passenger seat) to the appropriate position ...

Installation
Install fan and generator v belt Using sst and 19 mm socket wrench, loosen the vribbed belt tensioner arm clockwise, then install the fan and generator v belt. Sst 09216-42010 Notice: Be sure to connect sst and the tools so that they are in line during use. When retracti ...

Short to gnd in can bus line
(2005/11-2006/01) Description There may be a short circuit between the can bus line and gnd when there is resistance between terminals 6 (canh) and 4 (cg) or terminals 14 (canl) and 4 (cg) of the dlc3. Wiring diagram Inspection procedure Notice: Turn the ignition switch off b ...

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