P312A
Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
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-I
With CONSULT
1.Turn power switch ON and wait at least 20 seconds.
2.Turn power switch OFF and wait at least 1 minutes.
3.Turn power switch ON.
4.Check DTC.
Is DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- GO TO 3.
3. PERFORM DTC CONFIRMATION PROCEDURE-II
With CONSULT
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.Disconnect EVSE and wait at least 1 minutes.
5.Turn power switch ON.
6.Check DTC.
Is DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END
Diagnosis Procedure
1. CHECK VCM POWER SUPPLY CIRCUIT
1.Turn power switch ON.
2.Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.
2. CHECK FUSE
1.Turn power switch OFF.
2.Pull out #55 fuse.
3.Check the fuse is not fusing.
Is the inspection result normal?
YES- Replace IPDM E/R. Refer to "Removal and Installation" Removal And Installation.
NO- Replace the fuse after repairing the applicable circuit.
3. CHECK VCM POWER SUPPLY
1.Turn power switch OFF.
2.Disconnect VCM harness connector.
3.Turn power switch ON.
4.Check the voltage between VCM harness connector and ground.
Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.
4. CHECK VCM POWER SUPPLY CIRCUIT
1.Turn power switch OFF.
2.Disconnect IPDM E/R harness connector.
3.Check the continuity between VCM harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace error-detected parts.
5. CHECK TRACTION MOTOR INVERTER POWER SUPPLY (POWER ON) CIRCUIT
1.Turn power switch OFF.
2.Reconnect VCM harness connector.
3.Disconnect traction motor inverter harness connector (F13).
4.Perform confirmation procedure. Refer to "DTC Logic" .
Is DTC "P312A" detected?
YES- GO TO 6.
NO- Check traction motor inverter power supply (POWER ON) circuit for short to power.
6. CHECK LBC POWER SUPPLY (POWER ON) CIRCUIT
1.Turn power switch OFF.
2.Reconnect traction motor inverter harness connector harness connector.
3.Disconnect LBC harness connector (B24).
4.Perform confirmation procedure. Refer to "DTC Logic" .
Is "P312A" detected?
YES- GO TO 7.
NO- Check LBC power supply (POWER ON) circuit for short to power.
7. CHECK ON BOARD CHARGER POWER SUPPLY (POWER ON) CIRCUIT
1.Turn power switch OFF.
2.Reconnect LBC harness connector.
3.Disconnect on-board charger harness connector (B26).
4.Perform confirmation procedure. Refer to "DTC Logic" .
Is DTC "P312A" detected?
YES- GO TO 8.
NO- Check on board charger power supply (POWER ON) circuit for short to power.
8. CHECK A/C AUTO AMP. POWER SUPPLY (POWER ON) CIRCUIT
1.Turn power switch OFF.
2.Reconnect on-board charger harness connector.
3.Disconnect A/C auto amp. harness connector (M50).
4.Perform confirmation procedure. Refer to "DTC Logic" .
Is DTC "P312A" detected?
YES- GO TO 9.
NO- Check A/C auto amp. power supply (POWER ON) circuit for short to power.
9. CHECK TCU POWER SUPPLY (POWER ON) CIRCUIT
1.Turn power switch OFF.
2.Reconnect A/C auto amp. harness connector.
3.Disconnect TCU harness connector (M2).
4.Perform confirmation procedure. Refer to "DTC Logic" .
Is DTC "P312A" detected?
YES- GO TO 10.
NO- Check TCU power supply (POWER ON) circuit for short to power.
10. CHECK ELECTRIC SHIFT CONTROL MODULE POWER SUPPLY (POWER ON) CIRCUIT
1.Turn power switch OFF.
2.Reconnect TCU harness connector.
3.Disconnect electric shift control module harness connector (M59).
4.Perform confirmation procedure. Refer to "DTC Logic" .
Is DTC "P312A" detected?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Check electric shift control module power supply (POWER ON) circuit for short to power.