Toyota Yaris: Stop And Start System / Starter Relay Signal Compare Failure (P061562)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / Stop And Start / Stop And Start System / Starter Relay Signal Compare Failure (P061562)

DESCRIPTION

When the STA signal detected by the ECM and by the engine stop and start ECU do not match, the engine stop and start ECU stores DTC P061562 and blinks the stop and start cancel indicator.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

Note

P061562

Starter Relay Signal Compare Failure

Both of the following conditions are met for 2 seconds or more (1 trip detection logic):

  • Normal communication with the ECM.
  • The STA signal detected by the ECM and engine stop and start ECU do not match.
  • Wire harness or connector
  • ST NO. 1 relay
  • ECM
  • Engine stop and start ECU

Blinks

DTC stored

SAE Code: P0615

CONFIRMATION DRIVING PATTERN

HINT:

  • If the cable is disconnected from the auxiliary battery terminal, stop and start control is prohibited until refresh charge is completed.

    In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item Status of auxiliary battery Charge Control changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the auxiliary battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

  • If the GTS is not available and the Data List item Status of Auxiliary Battery Charge Control cannot be checked, charge the auxiliary battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

    If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

  • After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
  • Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.

CONFIRMATION AFTER TROUBLESHOOTING

(a) Clear the DTCs.

Powertrain > Stop and Start > Clear DTCs

(b) Start the engine and warm it up.

(c) Drive the vehicle at 7 km/h (4 mph) or more.

CAUTION:

When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.

(d) Stop the vehicle, move the shift lever to neutral and release the clutch pedal.

(e) Keep the engine stopped by stop and start control for 1 second or more.

(f) Depress the clutch pedal and start the engine.

(g) Check that DTCs are not output.

Powertrain > Stop and Start > Trouble Codes

STOP AND START SYSTEM OPERATION CHECK

Click here

WIRING DIAGRAM

Refer to DTC P061519.

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU, perform learning of the external backup boost converter (eco run vehicle converter assembly).

    Click here

  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • When the ECM is replaced on a vehicle with a non-specified auxiliary battery, it is necessary to perform auxiliary battery type switching.

    Click here

HINT:

  • Using the GTS, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.

    Click here

  • For wire harness and connector inspection procedures and precautions, refer to
  • DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.

    Click here

PROCEDURE

1.

READ VALUE USING GTS (ENGINE STARTER SIGNAL)

Powertrain > Stop and Start > Data List

Tester Display

Engine Starter Signal

(a) Read the values displayed on the GTS when the ignition switch is ON and START.

OK:

GTS Display

Switch Condition

Normal Condition

Engine Starter Signal

Ignition switch ON

OFF

Engine Starter Signal

Ignition switch START

ON

NG

GO TO STEP 4

OK

2.

READ VALUE USING GTS (STARTER SW)

Powertrain > Engine > Data List

Tester Display

Starter SW

(a) Read the values displayed on the GTS when the ignition switch is ON and START.

OK:

GTS Display

Switch Condition

Normal Condition

Starter SW

Ignition switch ON

OFF

Starter SW

Ignition switch START

ON

OK

USE SIMULATION METHOD TO CHECK

NG

3.

CHECK HARNESS AND CONNECTOR (ECM - ST NO. 1 RELAY)

(a) Disconnect the H45 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the A64 clutch start switch assembly connector.

(c) Disconnect the A106 ECM connector.

(d) Disconnect the A66 and A67 engine stop and start ECU connectors.

(e) Remove the ST NO. 1 relay from the No. 1 engine room relay block.

(f) Measure the resistance according to the value(s) in the table below.

Click here

Standard Resistance:

Tester Connection

Condition

Specified Condition

A106-30 (STA) - 2 (ST NO. 1 relay holder)

Always

Below 1 Ω

A106-30 (STA) -Body ground and other terminals

Always

10 kΩ or higher

2 (ST NO. 1 relay holder) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ECM - ST NO. 1 RELAY)

(a) Disconnect the H45 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the A64 clutch start switch assembly connector.

(c) Disconnect the A106 ECM connector.

(d) Disconnect the A66 and A67 engine stop and start ECU connectors.

(e) Remove the ST NO. 1 relay from the No. 1 engine room relay block.

(f) Measure the resistance according to the value(s) in the table below.

Click here

Standard Resistance:

Tester Connection

Condition

Specified Condition

A67-21 (STA) - 2 (ST NO. 1 relay holder)

Always

Below 1 Ω

A106-30 (STA) - 2 (ST NO. 1 relay holder)

Always

Below 1 Ω

A67-21 (STA) - A106-30 (STA)

Always

Below 1 Ω

A67-21 (STA) - Body ground and other terminals

Always

10 kΩ or higher

A106-30 (STA) -Body ground and other terminals

Always

10 kΩ or higher

2 (ST NO. 1 relay holder) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT RELAY (ST NO. 1 RELAY)

Click here

NG

REPLACE RELAY (ST NO. 1 RELAY)

OK

6.

CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BODY GROUND)

(a) Remove the ST NO. 1 relay from the No. 1 engine room relay block.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (ST NO. 1 relay holder) - Body ground

Always

Below 1 Ω

OK

REPLACE ENGINE STOP AND START ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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