P3176
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P3176 is displayed with DTC P0A94, P0A08, P311C, P317A, P3191, P319C, P31A7, P31D4, P31D7, or P31DD, perform diagnosis for DTC P0A94, P0A08, P311C, P317A, P3191, P319C, P31A7, P31D4, P31D7, or P31DD.
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-I
With CONSULT
1.Set the vehicle to READY and wait at least 10 seconds.
2.Check DTC.
Is DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- GO TO 3.
3. PERFORM DTC CONFIRMATION PROCEDURE-II
1.Turn power switch OFF.
2.Check that the charging status indicator is not illuminating, and wait at least 20 seconds.
3.Connect EVSE (with AC power input) and wait at least 10 seconds.
4.Turn power switch ON.
5.Check DTC.
Is DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END
Diagnosis Procedure
WARNING:
- Because hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.
- Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.
- To prevent the removed service plug from being connected by mistake during the procedure, always carry it in your pocket or put it in the tool box.
- Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.
- Clearly identify the persons responsible for high voltage work and ensure that other persons do not touch the vehicle. When not working, cover high voltage parts with an insulating cover sheet or similar item to prevent other persons from contacting them.
- Refer to "High Voltage Precautions" High Voltage Precautions.
CAUTION:
- There is the possibility of a malfunction occurring if the vehicle is changed to READY status while the service plug is removed. Therefore do not change the vehicle to READY status unless instructed to do so in the Service Manual.
- Erase DTC after the work is completed.
1. PERFORM SELF-DIAGNOSIS OF VCM
Perform self-diagnosis of VCM.
Is DTC detected other than P3176?
YES- Check the DTC.
NO- GO TO 2.
2. PRECONDITIONING
WARNING:
Disconnect high voltage. Refer to "How to Disconnect High Voltage" Service and Repair.
Check voltage in high voltage circuit. (Check that condenser are discharged.)
1.Lift up the vehicle and remove the Li-ion battery under covers. Refer to "Removal and Installation" Service and Repair (without Li-ion battery heater models), "Removal and Installation" Service and Repair (with Li-ion battery heater models).
2.Disconnect high voltage harness connector from front side of Li-ion battery. Refer to "Removal and Installation" Service and Repair (without Li-ion battery heater models), "Removal and Installation" Service and Repair (with Li-ion battery heater models).
3.Measure voltage between high voltage harness connector terminals.
DANGER:
Touching high voltage components without using the appropriate protective equipment will cause electrocution.
Standard: 5 V or less
CAUTION:
For voltage measurements, use a tester which can measure to 500 V or higher.
- GO TO 3.
3. CHECK ELECTRIC COMPRESSOR
1.Disconnect electric compressor high voltage harness connector.
2.Check the short circuit between electric compressor terminals.
Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.
4. CHECK DC/DC JUNCTION BOX
1.Remove DC/DC junction box. Refer to "Removal and Installation" Removal And Installation.
2.Check the continuity between DC/DC junction box connector terminals.
Is the inspection result normal?
YES- Replace electric compressor. Refer to "Removal and Installation" Removal And Installation.
NO- Replace electric compressor and DC/DC junction box. Refer to "Removal and Installation" Removal And Installation
(electric compressor), "Removal and Installation" Removal And Installation (DC/DC-J/B).
5. CHECK PTC ELEMENTS HEATER
1.Disconnect PTC elements heater high voltage harness connector.
2.Check the short circuit between PTC elements heater terminals.
Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 6.
6. CHECK DC/DC JUNCTION BOX
1.Remove DC/DC junction box. Refer to "Removal and Installation" Removal And Installation.
2.Check the continuity between DC/DC junction box connector terminals.
Is the inspection result normal?
YES- Replace PTC elements heater. Refer to "Removal and Installation" Removal And Installation.
NO- Replace PTC elements heater and DC/DC junction box. Refer to "Removal and Installation" Removal And Installation (PTC elements heater), "Removal and Installation" Removal And Installation (DC/DC-J/B).
7. CHECK TRACTION MOTOR INVERTER
1.Disconnect DC/DC junction box high voltage harness connector (H15).
2.Check the short circuit between DC/DC junction box harness connector terminals.
Is the inspection result normal?
YES- GO TO 8.
NO- Replace traction motor inverter. Refer to "Removal and Installation"
8. CHECK HIGH VOLTAGE HARNESS
1.Remove DC/DC junction box.
2.Check the short circuit between high voltage harness terminals.
Is the inspection result normal?
YES-1 (with Li-ion battery heater)-GO TO 9.
YES-2 (without Li-ion battery heater)-Replace VCM. Refer to "Removal and Installation" Removal And Installation.
NO- Replace malfunctioning harness.
9. CHECK LI-ION BATTERY HEATER CIRCUIT
Check the short circuit between Li-ion battery terminals.
Is the inspection result normal?
YES- Replace VCM. Refer to "Removal and Installation" Removal And Installation.
NO- Check Li-ion battery heater system.