CONDITION

SPECIFIED CONDITION

Frame Wire Connector
Housing – Body Ground

Always

Below 1 Ω

N. If the results are NOT as specified, inspect the connection according to the Repair
Manual for proper installation.
HV Battery > Charging
O. Use the table below to select the High Voltage and Low Voltage cables for a specific
model. Some vehicles may also require a High Voltage Accessory.

Model

MY

CT200h
HS250h
ES300h
NX300h
RX400h
RX450h
GS450h
LS600h

11 - 16
10 - 12
13 - 16
15 - 16
06 - 08
10 - 16
07 - 16
08 - 16

Part Number / Model Application
High Voltage Cables
HV Accessory
Low Voltage Cable / HV Bonding Cable
01413-00015
01413-00016
01413-00009
01413-00003
01413-00004
Cable (C)
Cable (D)
Cable (E)
Interlock Connector
Cable (R )
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x

© 2015 Lexus, a division of Toyota Motor Sales, USA

L-SB-0088-15

December 17, 2015

Page 7 of 13

High Voltage (HV) Battery Rescue Charge (HEV Workstation / GRX-5100)
Rescue Charge Ni-MH (Continued)
P. Connect the corresponding High Voltage cable to the fuse box.
Q. Connect High Voltage Cable V to the fuse box.
R. Connect High Voltage Cable V to the GRX-5100.
S. Connect the corresponding Low Voltage cable to the GRX-5100.
T. Install the inverter terminal cover to the inverter assembly.
NOTICE
 Do NOT allow any foreign material or water to enter the inverter assembly.
 Make sure all connectors are connected securely.

CAUTION
 Always wear insulated gloves and the appropriate Personal Protective Equipment
(PPE) provided in the HEV Workstation when working with High Voltage.
 Always use insulated tools provided in the HEV Workstation when working with
High Voltage.

U. Connect the green HV Bonding Cable
to a suitable chassis ground
V. Press Next.

Figure 7.

W. Connect the low voltage cable to
inverter terminal cover.

Figure 8.

X. Press Next.
NOTE
Not all vehicles require a separate
Low Voltage Cable circuit.

© 2015 Lexus, a division of Toyota Motor Sales, USA

L-SB-0088-15

December 17, 2015

Page 8 of 13

High Voltage (HV) Battery Rescue Charge (HEV Workstation / GRX-5100)
Rescue Charge Ni-MH (Continued)
Y. Connect the HV Cable to the vehicle’s
frame wire.
NOTE
HV cable connections will vary by
vehicle (refer to Step “O” for vehicle
specific cable application)

Z. Press Next.

Figure 9.

HINT
 Certain HV Cables require a
grounding bolt to complete the HV
Bonding Test.
 HV Cables requiring a grounding
bolt have been labeled using a
black sticker indicating bolt
location, size, and torque.

AA. Install the interlock connector in
the inverter.

Figure 10.

HINT
The battery charge active test will fail
and a DTC will set if the interlock
connector is not installed.

BB. Overall view of connectors and their connections for the GRX-5100 are shown below for
HV Battery Rescue Charge.
HINT
Please refer to the Repair Manual for vehicle specific instructions for disassembly and
connector locations.

© 2015 Lexus, a division of Toyota Motor Sales, USA

L-SB-0088-15

December 17, 2015

Page 9 of 13

High Voltage (HV) Battery Rescue Charge (HEV Workstation / GRX-5100)
Rescue Charge Ni-MH (Continued)
Figure 11 This is an example of a connection for a 2011 – 2015 CT 200h.

NOTE
Refer to HV Battery > Charging in the Repair Manual for applicable model.

© 2015 Lexus, a division of Toyota Motor Sales, USA

L-SB-0088-15

December 17, 2015

Page 10 of 13

High Voltage (HV) Battery Rescue Charge (HEV Workstation / GRX-5100)
Rescue Charge Ni-MH (Continued)
CC. Wait for the internal test
to complete.

Figure 12.

DD. Install the service plug grip.

Figure 13.

EE. Press Next.
NOTICE
Make sure the Service Plug
Grip’s interlock is
fully engaged.

FF. Connect the negative (-) terminal of
the auxiliary battery.
HINT
Connect the GR8 using power
supply mode to the
auxiliary battery.

GG. Please wait for the HV Bonding test
to complete.

Figure 14.

© 2015 Lexus, a division of Toyota Motor Sales, USA

L-SB-0088-15

December 17, 2015

Page 11 of 13

High Voltage (HV) Battery Rescue Charge (HEV Workstation / GRX-5100)

Rescue Charge Ni-MH (Continued)
4. HV Battery rescue charging
A. Turn the vehicle power switch (IG) ON.
B. Connect Techstream to DLC3.
C. Enter the following menus: Powertrain – Hybrid Control – Active Test – Battery Charge.
HINT
During the “Battery Charge” Active Test, check “System Main Relay Status – SMRB” and
“System Main Relay Status – SMRG” on the Data List.

D. Open the “Battery Charge” Active Test
and click the ON button on Techstream
press NEXT on the GRX-5100 to
start HV Battery Charging within 30 seconds.

Figure 15.

then

HINT








After the Battery Charge active test has been turned ON, push the NEXT button on the
GRX-5100 within 30 seconds. If the next button is NOT pushed within the 30 seconds,
the SMR will open and the GRX-5100 will NOT be able to charge the HV Battery.
If the shielding of the frame wire is NOT securely connected to body ground, the GRX5100 charging condition status will be displayed on the screen of the GRX-5100 while
HV Battery charging.
During the HV Battery charge cycle, the voltage and charge current will be recorded on
the flash drive.
The GRX-5100 will automatically stop 10 minutes after charging starts. SMRs will
automatically open as soon as the GRX-5100 stops charging.
If the Data List values are NOT as specified in the table below, restart the Techstream
and cycle the vehicle’s power switch (IG) OFF/ON and then perform the “HV Battery
Rescue Charging” procedure again.

© 2015 Lexus, a division of Toyota Motor Sales, USA

L-SB-0088-15

December 17, 2015

Page 12 of 13

High Voltage (HV) Battery Rescue Charge (HEV Workstation / GRX-5100)

Rescue Charge Ni-MH (Continued)
STEP

ACTIVE TEST
BATTERY CHARGE

GRX-5100
START SWITCH

DATA LIST SYSTEM
MAIN RELAY
STATUS – SMRB

DATA LIST SYSTEM
MAIN RELAY
STATUS – SMRG

1

OFF

OFF

OFF

OFF

2

OFF → ON

OFF

OFF → ON

OFF → ON

3

ON

OFF → ON

ON

ON

E. Please wait for the “Rescue Charge”
to start.

F. Repeat the charge cycle up to 3 times,
if required.

Figure 16.

Figure 17.

© 2015 Lexus, a division of Toyota Motor Sales, USA

L-SB-0088-15

December 17, 2015

Page 13 of 13

High Voltage (HV) Battery Rescue Charge (HEV Workstation / GRX-5100)
Rescue Charge Ni-MH (Continued)
HINT
 Charging time while using the GRX-5100 is 10 minutes per charge cycle when the
battery temperature is above 77°F (25°C), 10 minutes may be sufficient, if the battery
temperature is below 32°F (0°C), then three 10 minute charge cycles may be required
for putting the engine in a condition where it can be started (the system can enter the
READY-ON state). The GRX-5100 will automatically stop 10 minutes after
charging starts.
 There is very little chance of overcharging the HV Battery during the second or third
charging cycle. The SOC will NOT likely increase beyond the upper limit because it
was low enough to prevent the engine from starting. Even if the SOC was to increase
enough to exceed the limit, the hybrid vehicle control ECU will stop the Active Test to
prevent overcharging.
 Cranking the engine once causes the SOC to drop approximately 1%.
 Charging the HV Battery once (10 minutes) using the GRX-5100 restores the SOC
approximately 2%.

5. Reassemble the vehicle.
CAUTION
 Always wear insulated gloves and the appropriate Personal Protective Equipment
(PPE) provided in the HEV Workstation when working with High Voltage.
 Always use insulated tools provided in the HEV Workstation when working with
High Voltage.

A. Turn the GRX-5100 power switch OFF.
B. Turn the vehicle power switch OFF.
C. Disconnect 12 V auxiliary battery.
D. Remove the service plug grip.
E. Remove the GRX-5100 cables and interlock connector.
F. Reassemble the vehicle following the Repair Manual.
G. Install the service plug grip.
H. Reconnect the 12 V auxiliary battery.
I. Perform a Health Check using Techstream.
J. Confirm the vehicle will Ready ON.
K. Perform initialization of vehicle systems as needed.
HINT
Please refer to the Repair Manual for vehicle specific instruction for reassembly and
connector locations.

© 2015 Lexus, a division of Toyota Motor Sales, USA