P31E8

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

- Turn power switch OFF and wait at least 20 seconds.
- Make sure that 12V battery voltage is 11 V or more.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Turn power switch OFF and wait at least 60 seconds.
2.Set the vehicle to READY and wait at least 60 seconds.
3.Check DTC.
Is DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK SELF-DIAGNOSTIC RESULT IN VCM

Check self-diagnostic result in "EV/HEV".
Is DTC detected other than P31E8?
YES- Perform diagnosis procedure of detected DTC.
NO- GO TO 2.

2. CHECK WATER PUMP 1 FEEDBACK DUTY-I

With CONSULT
1.Set the vehicle to READY.
2.On the CONSULT screen, select "EV/HEV" - "DATA MONITOR" - "W/P 1 CRNT SPD DUTY".
3.Check "W/P 1 CRNT SPD DUTY" value.
Is value more than 98%?
YES- GO TO 5.
NO- GO TO 3.

3. CHECK WATER PUMP 1 FEEDBACK DUTY-II

With CONSULT
Check "W/P 1 CRNT SPD DUTY" value.
Is value less than 2%?
YES- GO TO 5.
NO- GO TO 4.

4. CHECK WATER PUMP 1 FEEDBACK DUTY-III

With CONSULT
1.On the CONSULT screen, select "EV/HEV" - "DATA MONITOR" - "W/P 1 CRNT SPD DUTY" and
"WATER PUMP 1 TRG DUTY".
2.Check that "W/P 1 CRNT SPD DUTY" and "WATER PUMP 1 TRG DUTY" agree with the values listed below.





Are the above values satisfied?
YES- GO TO 5.
NO- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.

5. CHECK WATER PUMP 1 SIGNAL CIRCUIT

1.Turn power switch OFF.
2.Disconnect electric water pump 1 harness connector and VCM harness connector.
3.Check the continuity between electric water pump 1 harness connector and VCM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace error-detected parts.

6. CHECK FUSE

1.Turn power switch OFF.
2.Pull out #71 fuse.
3.Make sure that the fuse is not fusing.
Is the inspection result normal?
YES- GO TO 7.
NO- Replace the fuse after repairing the applicable circuit.

7. CHECK WATER PUMP 1 INPUT POWER VOLTAGE

1.Insert the fuse which pulled out.
2.Disconnect water pump 1 harness connector.
3.Turn power switch ON.
4.Check the voltage between water pump 1 harness connector and ground.





Is the inspection result normal?
YES- Replace electric water pump 1. Refer to "Removal and Installation" Removal And Installation.
NO- GO TO 8.

8. CHECK WATER PUMP 1 INPUT POWER CIRCUIT-I

1.Turn power switch OFF.
2.Pull out #71 fuse.
3.Check the continuity between electric water pump 1 harness connector and fuse terminal.





4.Also check harness for short to ground.
Is the inspection result normal?
YES- GO TO 9.
NO- Repair or replace error-detected parts.

9. CHECK WATER PUMP 1 INPUT POWER CIRCUIT-II

1.Remove M/C relay.
2.Check the continuity between M/C relay harness connector and fuse terminal.





3.Also check harness for short to ground.
Is the inspection result normal?
YES- Perform trouble diagnosis for M/C relay routing circuit. Refer to "Diagnosis Procedure" M/C Relay.
NO- Repair or replace error-detected parts.