MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU assembly detects a VB sensor or VL sensor malfunction.
The cause of this malfunction may be one of the following:
Voltage sensor malfunction
Motor generator control ECU (MG ECU) malfunction
Communication (wire harness) malfunction
HV battery malfunction
HV battery junction block assembly malfunction
Inverter with converter assembly malfunction
High-voltage wire harness malfunction
High-voltage connector or connection malfunction
Inspection Overview
| Inspection Content | Reason (Narrow Down in Order Using Inspection Procedures Below) | Inspection Step |
|---|---|---|
| Check for DTCs (HV) | Output DTCs | 1 |
| Check for DTCs (check voltage sensor malfunction locations)
Check for DTCs (drive test) |
Power switch on (READY) (vehicle stopped or being driven) and then check whether DTCs are output again. | 3, 4 |
| Read value using GTS | Data List value | 5 |
| Check freeze frame data (HV) | Freeze Frame Data | 6 |
| Read value using GTS | Accelerator and brake pedal simultaneously depressed Data List value | 7 |
For a description of the boost converter.
The MG ECU uses a voltage sensor (VL) that is built into the boost converter to detect the high voltage before it is boosted. The ECU also uses the battery ECU assembly to detect HV battery voltage (VB).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| P1C2D62 | Hybrid/EV Battery "A" Voltage Sensor/Boosting Converter Voltage Sensor "A" Signal Compare Failure | Voltages from HV battery voltage (VB) sensor and boost converter voltage (VL) sensor deviate:
Difference between "VL-Voltage before Boosting" and "Hybrid/EV Battery Voltage" is large when the boosting request is given. (1 trip detection logic) |
·
Inverter with converter assembly ·
Battery ECU assembly |
Comes on | Master Warning:
Comes on |
SAE Code:
P1C2D |
| DTC No. | Data List |
|---|---|
| P1C2D62 | ·
Hybrid/EV Battery Voltage ·
VL-Voltage before Boosting ·
VH-Voltage after Boosting ·
Boost Ratio |
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and turn the GTS on.
Turn the power switch on (READY). [*1]
With the shift lever in D, depress both the accelerator pedal and brake pedal at the same time to raise the "Hybrid/EV Battery SOC" to a sufficient level. [*2]
Move the shift lever to P, check that the engine is stopped and move the shift lever to N. [*3]
Set the A/C for maximum cooling. [*4]
Leave the vehicle for a few minutes. [*5]
When the accelerator pedal is not depressed with the power switch on (READY) and shift lever in P, if "VL-Voltage before Boosting" and the "Hybrid/EV Battery Voltage" is approximately the same after repair, the condition is judged as normal.
[*1] to [*5] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
Check the DTC judgment result.
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control, Motor Generator, HV Battery / Trouble Codes.
Check for DTCs.
| Result | Proceed to |
|---|---|
One of the following applies:
·
Only P1C2D62 is output. ·
One or more DTCs other than P0E311C, P0CA300, P0B231C, and DTCs in the table below are also output. |
A |
| P1C2D62 and P0E311C or P0CA300 are output at the same time. | B |
| P1C2D62 and P0B231C are output at the same time. | C |
| DTCs of hybrid control system in the tables below are output. | D |
| DTCs of motor generator control system in the tables below are output. | E |
| DTCs of hybrid battery system in the tables below are output. | F |
| Malfunction Content | System | Relevant DTC | |
|---|---|---|---|
| Microcomputer malfunction | Hybrid control system | P060647 | Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure |
| P0A1B49 | Drive Motor "A" Control Module Internal Electronic Failure | ||
| P060B49 | Hybrid/EV Powertrain Control Module A/D Processing Internal Electronic Failure | ||
| P060687 | Hybrid/EV Powertrain Control Module Processor to Monitoring Processor Missing Message | ||
| P060A47 | Hybrid/EV Powertrain Control Module Monitoring Processor Watchdog / Safety MCU Failure | ||
| P060A87 | Hybrid/EV Powertrain Control Module Processor from Monitoring Processor Missing Message | ||
| Motor generator control system | P0A1A47 | Generator Control Module Watchdog / Safety μC Failure | |
| P0A1A49 | Generator Control Module Internal Electronic Failure | ||
| P0A1B1F | Generator Control Module Circuit Intermittent | ||
| P1C2A1C | Generator A/D Converter Circuit Circuit Voltage Out of Range | ||
| P1C2A49 | Generator A/D Converter Circuit Internal Electronic Failure | ||
| P313383 | Communication Error from Generator to Drive Motor "A" Value of Signal Protection Calculation Incorrect | ||
| P313386 | Communication Error from Generator to Drive Motor "A" Signal Invalid | ||
| P313387 | Communication Error from Generator to Drive Motor "A" Missing Message | ||
| Hybrid battery system | P060B49 | Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure | |
| P060687 | Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message | ||
| P060A47 | Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure | ||
| P060A87 | Hybrid/EV Battery Energy Control Module Processor from Monitoring Processor Missing Message | ||
| P060B16 | Hybrid/EV Battery Energy Control Module A/D Processing Circuit Voltage Below Threshold | ||
| P0E2D00 | Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance | ||
| Power source circuit malfunction | Motor generator control system | P06D61C | Generator Control Module Offset Power Circuit Voltage Out of Range |
| Communication system malfunction | Hybrid control system | P312387 | Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message |
| U011187 | Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message | ||
| Sensor and actuator circuit malfunction | Hybrid battery system | P301A1C | Hybrid Battery Stack 1 Cell Voltage Detection Voltage Out of Range |
| P1A001C | Hybrid Battery Stack 2 Cell Voltage Detection Voltage Out of Range | ||
| P1AFD1C | Flying Capacitor/Internal Control Module Hybrid/EV Battery Monitor Voltage Out of Range | ||
| System malfunction | Motor generator control system | P0E3116 | DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold |
| P0E3117 | DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold | ||
P1C2D62 may be output as a result of the malfunction indicated by the DTCs above.
The chart above is listed in inspection order of priority.
Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
Turn the power switch off.
A
B
for 2WD:
for AWD:
C
D
E
for 2WD:
for AWD:
F
| Proceed to |
|---|
| NEXT |
NEXT
Apply the parking brake and secure the wheels using chocks.
Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.
When the parking brake indicator (red) is illuminated after the electric parking brake switch assembly has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch assembly is pulled to the lock side one more time.
Connect the GTS to the DLC3. *1
Turn the power switch on (READY). *2
Enter the following menus: Powertrain / Hybrid Control / Data List / Hybrid/EV Battery SOC and Hybrid/EV Battery Current. *3
| Tester Display |
|---|
| Hybrid/EV Battery SOC |
| Hybrid/EV Battery Current |
If the value of "Hybrid/EV Battery SOC" is less than 55%, move the shift lever to D and charge the HV battery by depressing the accelerator pedal and brake pedal simultaneously until the value reaches 55% or more. *4
Move the shift lever to P. *5
Set the air conditioning to MAX COOL and turn the headlights on. *6
Confirm that "Hybrid/EV Battery Current" is more than 3 A. *7
With the engine stopped and the conditions of steps *5, *6 and *7 satisfied, leave the vehicle for 15 seconds. *8
Enter the following menus: Powertrain / Hybrid Control, Motor Generator and HV Battery / Trouble codes. *9
Check for DTCs. *10
If the low HV battery information comes on, move the shift lever to P and start the engine to charge the HV battery. After the engine stops, perform steps *1 through *10 again.
| Result | Proceed to |
|---|---|
| No DTCs are output, or DTCs except the following are output. | A |
| P0E311C or P0CA300 are output. | B |
| P0B231C or P1C8349 are output. | C |
| P300000 is output. | D |
Turn the power switch off.
A
B
for 2WD:
for AWD:
C
D
Turn the power switch on (READY). *11
Perform a road test that repeats full acceleration to 60 km/h (37 mph) and then braking to a complete stop three times. *12
Perform this road test only in an appropriate safe location, in accordance with all local laws.
This road test is performed to drive the car under high load and cause a change in the HV battery voltage.
Connect the GTS to the DLC3. *13
Enter the following menus: Powertrain / Hybrid Control, Motor Generator and HV Battery / Trouble Codes. *14
Check for DTCs. *15
| Result | Proceed to |
|---|---|
| No DTCs are output, or DTCs except the following are output. | A |
| P0E311C or P0CA300 are output. | B |
| P0B231C or P1C8349 are output. | C |
| P300000 is output. | D |
Turn the power switch off.
A
B
for 2WD:
for AWD:
C
D
Apply the parking brake and secure the wheels using chocks.
Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.
When the parking brake indicator (red) is illuminated after the electric parking brake switch assembly has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch assembly is pulled to the lock side one more time.
Connect the GTS to the DLC3.
Turn the power switch on (READY).
Enter the following menus: Powertrain / Hybrid Control / Data List / VL- Voltage before Boosting, VH-Voltage after Boosting, Hybrid/EV Battery SOC and Hybrid/EV Battery Voltage.
| Tester Display |
|---|
| VL-Voltage before Boosting |
| VH-Voltage after Boosting |
| Hybrid/EV Battery SOC |
| Hybrid/EV Battery Voltage |
If the value of "Hybrid/EV Battery SOC" is less than 55%, move the shift lever to D and charge the HV battery by depressing the accelerator pedal and brake pedal simultaneously until the value reaches 55% or more.
Release the accelerator pedal, move the shift lever to P and wait for the engine to stop. Read the Data List when the engine stops.
If the engine starts, wait until it stops before continuing.
| Result | Proceed to |
|---|---|
| Both of the following are not satisfied. | A |
| Both of the following are satisfied:
·
Difference between "Hybrid/EV Battery Voltage" and "VH-Voltage after Boosting" is less than 5 V. ·
Difference between "VL-Voltage before Boosting" and "VH-Voltage after Boosting" is more than 30 V. |
B |
| Both of the following are satisfied:
·
Difference between "VH-Voltage after Boosting" and "VL-Voltage before Boosting" is less than 5 V. ·
Difference between "Hybrid/EV Battery Voltage" and "VH-Voltage after Boosting" is more than 15 V. |
C |
Turn the power switch off.
A
B
for 2WD:
for AWD:
C
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Read the freeze frame data of DTC P1C2D62.
| Result | Proceed to |
|---|---|
| Both of the following are satisfied or both of the following are not satisfied. | A |
| "VL-Voltage before Boosting" is less than 144 V or more than 292 V. | B |
| "Hybrid/EV Battery Voltage" is less than 144 V or more than 292 V. | C |
Turn the power switch off.
A
B
for 2WD:
for AWD:
C
Apply the parking brake and secure the wheels using chocks.
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / HV Battery / Data List / Hybrid/EV Battery SOC, Hybrid/EV Battery Voltage, Hybrid/EV Battery Cell 1 to 70 Voltage.
| Tester Display |
|---|
| Hybrid/EV Battery SOC |
| Hybrid/EV Battery Voltage |
| Hybrid/EV Battery Cell 1 Voltage |
| Hybrid/EV Battery Cell 2 Voltage |
| Hybrid/EV Battery Cell 3 Voltage |
| Hybrid/EV Battery Cell 4 Voltage |
| Hybrid/EV Battery Cell 5 Voltage |
| Hybrid/EV Battery Cell 6 Voltage |
| Hybrid/EV Battery Cell 7 Voltage |
| Hybrid/EV Battery Cell 8 Voltage |
| Hybrid/EV Battery Cell 9 Voltage |
| Hybrid/EV Battery Cell 10 Voltage |
| Hybrid/EV Battery Cell 11 Voltage |
| Hybrid/EV Battery Cell 12 Voltage |
| Hybrid/EV Battery Cell 13 Voltage |
| Hybrid/EV Battery Cell 14 Voltage |
| Hybrid/EV Battery Cell 15 Voltage |
| Hybrid/EV Battery Cell 16 Voltage |
| Hybrid/EV Battery Cell 17 Voltage |
| Hybrid/EV Battery Cell 18 Voltage |
| Hybrid/EV Battery Cell 19 Voltage |
| Hybrid/EV Battery Cell 20 Voltage |
| Hybrid/EV Battery Cell 21 Voltage |
| Hybrid/EV Battery Cell 22 Voltage |
| Hybrid/EV Battery Cell 23 Voltage |
| Hybrid/EV Battery Cell 24 Voltage |
| Hybrid/EV Battery Cell 25 Voltage |
| Hybrid/EV Battery Cell 26 Voltage |
| Hybrid/EV Battery Cell 27 Voltage |
| Hybrid/EV Battery Cell 28 Voltage |
| Hybrid/EV Battery Cell 29 Voltage |
| Hybrid/EV Battery Cell 30 Voltage |
| Hybrid/EV Battery Cell 31 Voltage |
| Hybrid/EV Battery Cell 32 Voltage |
| Hybrid/EV Battery Cell 33 Voltage |
| Hybrid/EV Battery Cell 34 Voltage |
| Hybrid/EV Battery Cell 35 Voltage |
| Hybrid/EV Battery Cell 36 Voltage |
| Hybrid/EV Battery Cell 37 Voltage |
| Hybrid/EV Battery Cell 38 Voltage |
| Hybrid/EV Battery Cell 39 Voltage |
| Hybrid/EV Battery Cell 40 Voltage |
| Hybrid/EV Battery Cell 41 Voltage |
| Hybrid/EV Battery Cell 42 Voltage |
| Hybrid/EV Battery Cell 43 Voltage |
| Hybrid/EV Battery Cell 44 Voltage |
| Hybrid/EV Battery Cell 45 Voltage |
| Hybrid/EV Battery Cell 46 Voltage |
| Hybrid/EV Battery Cell 47 Voltage |
| Hybrid/EV Battery Cell 48 Voltage |
| Hybrid/EV Battery Cell 49 Voltage |
| Hybrid/EV Battery Cell 50 Voltage |
| Hybrid/EV Battery Cell 51 Voltage |
| Hybrid/EV Battery Cell 52 Voltage |
| Hybrid/EV Battery Cell 53 Voltage |
| Hybrid/EV Battery Cell 54 Voltage |
| Hybrid/EV Battery Cell 55 Voltage |
| Hybrid/EV Battery Cell 56 Voltage |
| Hybrid/EV Battery Cell 57 Voltage |
| Hybrid/EV Battery Cell 58 Voltage |
| Hybrid/EV Battery Cell 59 Voltage |
| Hybrid/EV Battery Cell 60 Voltage |
| Hybrid/EV Battery Cell 61 Voltage |
| Hybrid/EV Battery Cell 62 Voltage |
| Hybrid/EV Battery Cell 63 Voltage |
| Hybrid/EV Battery Cell 64 Voltage |
| Hybrid/EV Battery Cell 65 Voltage |
| Hybrid/EV Battery Cell 66 Voltage |
| Hybrid/EV Battery Cell 67 Voltage |
| Hybrid/EV Battery Cell 68 Voltage |
| Hybrid/EV Battery Cell 69 Voltage |
| Hybrid/EV Battery Cell 70 Voltage |
If the value of "Hybrid/EV Battery SOC" is less than 55%, move the shift lever to D and charge the HV battery by depressing the accelerator pedal and brake pedal simultaneously until the value reaches 55% or more.
Release the accelerator pedal, move the shift lever to P and wait for the engine to stop. Read the Data List when the engine stops.
If the engine starts, wait until it stops before continuing.
| Result | Proceed to |
|---|---|
| Both of the following are satisfied:
·
Sum of all "Hybrid/EV Battery Cell 1 to 70 Voltage" is more than ("Hybrid/EV Battery Voltage" - 45 V) ·
Sum of all "Hybrid/EV Battery Cell 1 to 70 Voltage" is less than ("Hybrid/EV Battery Voltage" + 30 V) |
A |
| The preceding condition is not satisfied. | B |
Turn the power switch off.
A
for 2WD:
for AWD:
B