Toyota RAV4 Service Manual: Starter relay circuit high

Description

While the engine is being cranked, the positive battery voltage is applied to terminal sta of the ecm. If the ecm detects the starter control (sta) signal while the vehicle is being driven, it determines that there is a malfunction in the sta circuit. The ecm then illuminates the mil and sets the dtc.

This monitor runs when the vehicle is driven at 20 km/h (12.4 Mph) for over 20 seconds.

Monitor strategy

Typical enabling conditions

Typical malfunction thresholds

Wiring diagram

Inspection procedure

Hint:

• The following troubleshooting flowchart is based on the premise that the engine is cranked normally.

  If the engine will not crank, proceed to the problem symptoms table (see page es-24).

• Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. Read value using intelligent tester (starter signal)

1. Connect the intelligent tester to the dlc3.
2. Turn the ignition switch on and turn the tester on.
3. Select the following menu items: diagnosis / enhanced obd ii / data list / primary / starter sig.
4. Check the value displayed on the tester when the ignition switch is turned to the on and start positions.

2. Inspect park/neutral position switch assembly

1. Disconnect the b26 pnp switch connector.
2. Measure the resistance when the transmission gear selector lever is moved to each position.

Standard resistance

3. Reconnect the pnp switch connector.

3. Replace park/neutral position switch assembly

4. Read value using intelligent tester (starter signal)

1. Connect the intelligent tester to the dlc3.
2. Turn the ignition switch on and turn the tester on.
3. Select the following menu items: diagnosis / enhanced obd ii / data list / primary / starter sig.
4. Check the value displayed on the tester when the ignition switch is turned to the on and start positions.

5. Inspect ignition or starter switch assembly

1. Disconnect the e3 ignition switch connector.
2. Check the resistance.

Standard resistance

3. Reconnect the ignition switch connector.

6. Replace ignition or starter switch assembly

7. Read value using intelligent tester (starter signal)

1. Connect the intelligent tester to the dlc3.
2. Turn the ignition switch on and turn the tester on.
3. Select the following menu items: diagnosis / enhanced obd ii / data list / primary / starter sig.
4. Check the value displayed on the tester when the ignition switch is turned to the on and start positions.

8. Repair or replace harness or connector (pnp switch - sta terminal of ecm)

9. 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. Drive the vehicle at more than 20 km/h (12.43 Mph) for over 20 seconds.
6. Select the following menu items: diagnosis / enhanced obd ii / dtc info / current codes.
7. Read dtcs.