Lexus NX manuals

Lexus NX: Hybrid Battery Pack State of Charge High (P0C30-390)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (hybrid / Battery Control) / Hybrid Control System / Hybrid Battery Pack State of Charge High (P0C30-390)

DESCRIPTION

The hybrid vehicle control ECU monitors its internal operation and will store a DTC and perform fail-safe control if it detects the following malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0C30-390

Hybrid Battery Pack State of Charge High

Charge control malfunction:

Charging of the HV battery continues even after charging is prohibited when the hybrid system is malfunctioning and "State of Charge (All Bat)" has reached the upper limit.

(1 trip detection logic)
  • Hybrid vehicle control ECU
  • Hybrid battery junction block assembly
  • Battery voltage sensor
  • Wire harness or connector

Does not come on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P0C30-390
  • State of Charge (All Bat)
  • Charge Control Value
  • Power Resource IB
  • Battery too High Time

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. When the vehicle is stopped with the power switch on (READY) and the shift lever in D, depress the accelerator pedal. The engine speed will increase as well as "State of Charge (All Bat)".

    If charge current drops, release the accelerator pedal and then depress it again to maintain charging.

  2. Check that charging stops when "State of Charge (All Bat)" reaches the upper limit.

PROCEDURE

1.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

(e) Turn the power switch off.

DTCs except P0C30-390 are output.

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

P0C30-390 only is output.

2.

CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Remove the No. 2 hybrid vehicle battery shield reinforcement.

Click here

(c) Connect the cable to the negative (-) auxiliary battery terminal.

(d) Turn the power switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

y2-1 (IGCT) - y2-5 (GND)

Power switch on (IG)

11 to 14 V

NOTICE:

Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

HINT:

As there might be an intermittent malfunction in the battery voltage sensor power source circuit, inspect the following even if the measured voltage is as specified:

  • Installation condition of fuse(s) (before removing fuse(s)) (IGCT circuit)
  • Fuse condition (before and after removing fuse(s)) (IGCT circuit)
  • Connection condition of connectors (IGCT circuit)
  • Wire harness condition (IGCT circuit)
  • Wire harness condition (GND circuit)

*a

Component with harness connected

(Battery Voltage Sensor)

(f) Turn the power switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Install the No. 2 hybrid vehicle battery shield reinforcement.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY VOLTAGE SENSOR POWER SOURCE CIRCUIT)
OK

3.

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - HYBRID BATTERY JUNCTION BLOCK ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Remove the No. 2 hybrid vehicle battery shield reinforcement.

Click here

(c) Disconnect the HV battery high voltage connector from the hybrid battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Disconnect the z13 battery current sensor connector from the hybrid battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(e) Disconnect the battery voltage sensor connector.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

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

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

z12-9 (IB) - z13-3 (IB)

Power switch off

Below 1 Ω

z12-20 (GIB) - z13-2 (GIB)

Power switch off

Below 1 Ω

z12-10 (VIB) - z13-1 (VIB)

Power switch off

Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection

Condition

Specified Condition

z12-9 (IB) or z13-3 (IB) - Body ground and other terminals

Power switch off

10 kΩ or higher

z12-20 (GIB) or z13-2 (GIB) - Body ground and other terminals

Power switch off

10 kΩ or higher

z12-10 (VIB) or z13-1 (VIB) - Body ground and other terminals

Power switch off

10 kΩ or higher

NOTICE:

When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

HINT:

As the battery harness is not available as a supply part, if the harness cannot be repaired, replace the HV battery.

*a

Rear view of wire harness connector

(to Battery Voltage Sensor)

*b

Front view of wire harness connector

(to Battery Current Sensor (Hybrid Battery Junction Block Assembly))

(g) Reconnect the battery voltage sensor connector.

(h) Reconnect the battery current sensor connector to the hybrid battery junction block assembly.

(i) Reconnect the HV battery high voltage connector to the hybrid battery junction block assembly.

(j) Install the No. 2 hybrid vehicle battery shield reinforcement.

NG

REPAIR HARNESS OR CONNECTOR (BATTERY CURRENT SENSOR)
OK

4.

CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Remove the No. 2 hybrid vehicle battery shield reinforcement.

Click here

(c) Connect the cable to the negative (-) auxiliary battery terminal.

(d) Turn the power switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

z12-10 (VIB) - z12-20 (GIB)

Power switch on (IG)

4.6 to 5.4 V

NOTICE:

Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

*a

Component with harness connected

(Battery Voltage Sensor)

(f) Turn the power switch off.

(g) Disconnect the cable from the negative (-) auxiliary battery terminal.

(h) Install the No. 2 hybrid vehicle battery shield reinforcement.

NG

GO TO STEP 7

OK

5.

CHECK BATTERY VOLTAGE SENSOR (GIB TERMINAL - GND TERMINAL)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Remove the No. 2 hybrid vehicle battery shield reinforcement.

Click here

(c) Disconnect the z12 and y2 battery voltage sensor connectors.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Measure the resistance according to the value(s) in the tables below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

z12-20 (GIB) - y2-5 (GND)

Power switch off

Below 1 Ω

*a

Component without harness connected

(Battery Voltage Sensor)

(e) Reconnect the z12 and y2 battery voltage sensor connectors.

(f) Install the No. 2 hybrid vehicle battery shield reinforcement.

NG

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY
OK

6.

CHECK HYBRID VEHICLE CONTROL ECU (POWER RESOURCE IB, BATT PACK CURRENT VAL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

NOTICE:

During the inspection, make sure to only turn the power switch on (IG). Do not turn the power switch on (READY).

(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Power Resource IB, Batt Pack Current Val.

Powertrain > Hybrid Control > Data List

Tester Display

Power Resource IB

Batt Pack Current Val

(d) With the power switch on (IG), monitor Data List item "Power Resource IB" and "Batt Pack Current" for 1 minute.

Result

Proceed to

The value of Data List item "Power Resource IB" and "Batt Pack Current" is -0.5 A or less or 0.5 A or more.

A

Other than above

B

(e) Turn the power switch off.

A

REPLACE BATTERY VOLTAGE SENSOR

B

REPLACE HYBRID VEHICLE CONTROL ECU

7.

CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Remove the No. 2 hybrid vehicle battery shield reinforcement.

Click here

(c) Disconnect the HV battery high voltage connector from the hybrid battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(d) Disconnect the z13 battery current sensor connector from the hybrid battery junction block assembly.

NOTICE:

Before disconnecting the connector, check that it is not loose or disconnected.

(e) Connect the cable to the negative (-) auxiliary battery terminal.

(f) Turn the power switch on (IG).

(g) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

z12-10 (VIB) - z12-20 (GIB)

Power switch on (IG)

4.6 to 5.4 V

NOTICE:

Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

*a

Component with harness connected

(Battery Voltage Sensor)

(h) Turn the power switch off.

(i) Disconnect the cable from the negative (-) auxiliary battery terminal.

(j) Reconnect the battery current sensor connector to the hybrid battery junction block assembly.

(k) Reconnect the HV battery high voltage connector to the hybrid battery junction block assembly.

(l) Install the No. 2 hybrid vehicle battery shield reinforcement.

OK

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY
NG

REPLACE BATTERY VOLTAGE SENSOR

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