Toyota RAV4 manuals

Toyota RAV4 Service Manual: Ecm / pcm internal engine off timer performance

Toyota RAV4 Service Manual / 2Az-fe engine mechanical / Sfi system / Diagnostic trouble code chart / Ecm / pcm internal engine off timer performance

Toyota RAV4. Ecm / pcm internal engine off timer performance


Dtc summary

Toyota RAV4. Ecm / pcm internal engine off timer performance


Description

To ensure the accuracy of the evap (evaporative emission) monitor values, the soak timer, which is built into the ecm, measures 5 hours (+-15 minutes) from when the ignition switch is turned off, before the monitor is run. This allows the fuel to cool down, which stabilizes the evap pressure. When 5 hours have elapsed, the ecm turns on.

Toyota RAV4. Ecm / pcm internal engine off timer performance


Monitor description

5 Hours after the ignition switch is turned off, the soak timer activates the ecm to begin the evap system monitor. While the engine is running, the ecm monitors the synchronization of the soak timer and the cpu clock. If these two are not synchronized, the ecm interprets this as a malfunction, illuminates the mil and sets the dtc (2 trip detection logic).

Monitor strategy

Toyota RAV4. Monitor strategy


Toyota RAV4. Monitor strategy


Typical enabling conditions

Toyota RAV4. Typical enabling conditions


Typical malfunction thresholds

Toyota RAV4. Typical malfunction thresholds


Inspection procedure

Hint:

  1. Replace ecm

  1. Replace the ecm (see page es-429).


  1. Check whether dtc output recurs

  1. Connect the intelligent tester to the dlc3.
  2. Turn the ignition switch on.
  3. Turn the tester on.
  4. Clear dtcs (see page es-35).
  5. Start the engine and wait for 10 minutes or more.
  6. On the tester, select the following menu items: diagnosis / enhanced obd ii / dtc info / pending codes.
  7. If no pending dtc is displayed, the repair has been successfully completed.


Evaporative emission system switching valve control
Dtc summary Hint: The vent valve is built into the canister pump module. Description The description can be found in the evap (evaporative emission) system (see page es-335). Inspection ...

A/f sensor circuit slow response (bank 1 sensor 1)
Hint: Sensor 1 refers to the sensor mounted in front of the three-way catalytic converter (twc) and located near the engine assembly. Description Refer to dtc p2195 (see page es-292). M ...

Other materials:

Installation
Install fuel filler opening lid lock retainer Install the lock retainer and turn it counterclockwise as shown in the illustration. Install fuel filler opening lid lock retainer Install the cable and turn it clockwise as shown in the illustration. Install the fuel l ...

Cooling fan relay
On-vehicle inspection 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. Remove engine room no. 2 Relay block cover Inspect ...

Stop light switch circuit
Description While driving with the cruise control, if the ecm detects that the brake pedal is depressed, the cruise control operation will be canceled. The stop light switch sends brake pedal status signals to the ecm. When the brake pedal is not depressed, terminal st1- is equal to the ...

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