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GRX-5100

Cable Connections

Click the tabs at the top and side to view each section

Charging Process

HEV Workstation

Screens, Part 2

These are the screens on the GRX-5100 control panel that you will see when performing a rescue charge.

Battery

Condition

Befor

e

Servicing

Pr

ocess

Overview

Scr
eens:

Part 1

Scr
eens:

Part 2

8.  Self-Test

 – Wait while the 

GRX-5100 performs an 
internal self test.

9.  Instructions

 – Install the 

service plug grip, connect 
the negative terminal of 
the auxiliary battery and 
connect a GR8 in power 
supply mode. Turn the vehicle power 
switch ON and then press the button 
under “Next.”

Charge

 – Wait while the 

GRX-5100 performs an HV 
bonding test.

Charge

 – Connect the 

Techstream to DLC3 and 
navigate to the Battery 
Charge Active Test. Turn  
the Active Test ON, and 
then press the button under “Next” within 30 
seconds. Observe the Data List to verify that 
SMRB and SMRG are ON.

If you miss the 30-second window, charging 
will abort. You will need to cycle the ignition, 
and exit and restart Techstream to begin the 
procedure again.

Charge

 – Wait while the 

GRX-5100 prepares to 
begin charging.

Charge

 – As charging is 

taking place, monitor the 
battery voltage.

11.

12.

13.

10.

Battery Charge 

Active Test

Toyota NiMH Battery Rescue Charging with the GRX-5100

Quick Training Guide QT015A

2001-2009

Prius

15 of 21

©Toyota Motor Sales, U.S.A., Inc., December 16, 2015

Summary of Contents for GRX-5100 L

Page 1: ...HEV Workstation for performing rescue charging of NiMH batteries in Toyota hybrid vehicles Prepared only for technicians that are Toyota Hybrid System certified CAUTIONS Always wear the appropriate P...

Page 2: ...hicle you re servicing for the specific location and procedure for removing the service plug grip Before Servicing 1 Turn the vehicle power switch OFF and remove the key from the interior detection ar...

Page 3: ...power switch OFF and turn off the GRX 5100 Disconnect GRX 5100 Disconnect the GRX 5100 power cord and remove the negative battery terminal of the auxiliary battery Remove the service plug grip Disconn...

Page 4: ...tions and then press the button under Next 6 Instructions The only wire in the low voltage cable Cable R is the green bonding wire that was connected to the vehicle in Screens Part 1 These are the scr...

Page 5: ...reen appears connect the low voltage cable as instructed in the Repair Manual then connect the other end to the GRX 5100 GRX 5100 Cable Connections Click the tabs at the top and side to view each sect...

Page 6: ...s the button under Next Charge Wait while the GRX 5100 performs an HV bonding test Charge Connect the Techstream to DLC3 and navigate to the Battery Charge Active Test Turn the Active Test ON and then...

Page 7: ...ions for rescue charging Note that the high voltage cable that connects to the vehicle is model specific Cabling Overview Verify Frame Wire Ground Low Voltage Cable High Voltage Cables Interlock Cover...

Page 8: ...ield line of the frame wire is not securely connected to body ground the error message Battery not detected or HV bonding test failed may appear and the GRX 5100 will not operate If the resistance is...

Page 9: ...low voltage cable and the green HV EV bonding cable are one and the same cable R Because 2001 2009 Prius models continue to use an green HV EV bonding cable AND a low voltage cable the instructions on...

Page 10: ...cable Cable V to the high voltage fuse box 4 Connect Cable V to the GRX 5100 High Voltage Cables Verify Frame Wire Ground Low Voltage Cable High Voltage Cables Cabling Overview High Voltage Cable Use...

Page 11: ...if the frame wire is disconnected It is not possible to charge the battery with this interlock open so an interlock cover is provided in drawer 2 of the HEV Workstation When installed the interlock co...

Page 12: ...procedure again As charging is taking place monitor the battery voltage If battery is insufficiently charged not above minimum voltage after first 10 minute cycle repeat the charge cycle Battery Char...

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