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

Toyota RAV4 (XA40) 2013-2018 Service Manual / Air conditioning / Air conditioning system (for automatic air conditioning system) / Diagnostic trouble code chart (2006/01- ) / 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

Inspect fuse (ecu-b2)

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

Standard resistance: below 1

Check wire harness (air conditioning amplifier - battery)

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

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

Standard voltage

Check wire harness (air conditioning amplifier - body ground)

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

Disconnect the e37 amplifier connector.
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:

Disassembly (2005/11-2006/01)
Remove front axle inboard joint boot no. 2 Clamp lh One touch type: Using a screwdriver, remove the inboard joint boot clamp, as shown in the illustration. Claw engagement type: Using needle-nose pliers, remove the inboard joint boot clamp, as shown in the illustra ...

System description
General The front passenger occupant classification system judges whether the front passenger seat is occupied or not in accordance with the seat belt buckle status; and whether the seat is occupied by an adult or child (with child seat) in accordance with the load that is applied ...

Removal
Disconnect cable from negative battery terminal Caution: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation. Disconnect cable from positive battery terminal Remove battery clamp ...