Toyota RAV4 manuals

Toyota RAV4 Service Manual: Tire pressure warning light circuit

Description

If the tire pressure warning ecu detects trouble, the tire pressure warning light turns on and tire pressure monitor is canceled at the same time. At this time, the ecu records a dtc in memory.

Connect terminals tc and cg of the dlc3 to make the tire pressure warning light blink and output the dtc.

Wiring diagram

Toyota RAV4. Tire pressure warning light circuit


Inspection procedure

Notice:

It is necessary to register an id code after replacing the tire pressure monitor valve and/or the tire pressure warning ecu (see page tw-9).

  1. Inspect fuse (gauge)

  1. Remove the gauge fuse from the instrument panel junction block.
  2. Measure the resistance of the fuse.

Standard resistance: below 1




  1. Check tire pressure warning light circuit

  1. Disconnect the e56 ecu connector.
  2. Using a service wire, connect e56-6 (ind) on the wire harness side and body ground.
  3. Turn the ignition switch on.
  4. Check that the tire pressure warning light turns on.

Toyota RAV4. Check tire pressure warning light circuit


Ok: tire pressure warning light turns on.



  1. Check wire harness (ecu - meter)

Toyota RAV4. Check wire harness (ecu - meter)


  1. Disconnect the e56 ecu connector.
  2. Disconnect the e19 meter connector.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




Proceed to next circuit inspection shown in problem symptoms table

Vehicle speed signal error (test mode dtc)
Description The tire pressure warning ecu receives a speed signal from the combination meter. This dtc is stored upon entering test mode, and cleared when a vehicle speed signal of 12 mph (20 ...

Ecu power source circuit
Description This is the power source for the tire pressure warning ecu. Wiring diagram Inspection procedure Notice: It is necessary to register an id code after replacing the tire pressure ...

Other materials:

Fail-safe chart
Fail-safe function When communication fails in any of the main wires (communication lines) due to a short circuit or other causes, the fail-safe function, which is specified for each system, operates to prevent the system from malfunctioning. The table below shows the effects on e ...

Freeze frame data
Freeze frame data Notice: It is difficult to show the specified values (judgment values) clearly because freeze frame data values change significantly due to differences in measurement conditions, surroundings, or vehicle conditions. For this reason, there may be a problem even w ...

Front wiper motor and link
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