MULTI-MODEL – i-ELOOP BATTERY SERVICE INFORMATION
APPLICABLE MODEL(S)/VINS
2014-2016 Mazda3 vehicles equipped with i-ELOOP
2014-2016 Mazda6 vehicles equipped with i-ELOOP
This service information provides basic Q-85/T-110 battery handling procedures. Complete service information can be found in MS3 online or Workshop Manual (section 13-17).
Q85/T110 BATTERY MAINTENANCE
Q85/T110 BATTERY TEST AND BATTERY CHARGING
- Remove the battery from the vehicle.
CAUTION: Do not charge the battery in the vehicle. Vehicle electrical system damage may occur.
- Remove the battery filler caps.
- Adjust battery fluid level if needed using distilled water.
- Connect the GR8 Battery Management System using the large cables.
- From the MAIN MENU, select Battery Test or Diagnostic.
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- From the LOCATION screen, select OUT OF VEHICLE.
- From the BATTERY TYPE screen, select I-ELOOP.
- From the TEST USING screen, select Q-85.
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| Battery Test Results | |
| Battery Charging
When test is complete, battery charging will automatically begin if needed. This may take several hours to complete. |
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| Battery Good |
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| Bad Cell |
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| State of Health |
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| Warranty Code |
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Q85/T110 BATTERY VOLTAGE MEASUREMENT
Battery voltage can only be measured on a battery that has not been recently charged. If the battery was recently charged, wait 6 hours or more before checking the battery voltage.
- Is the battery voltage 12.4 volts or higher?
Q85/T110 BATTERY SPECIFIC GRAVITY MEASUREMENT
Battery condition can be ascertained using this method; however, the preferred method is to use the GR8 Battery Management System. Refer to Q85/T110 BATTERY TEST AND BATTERY CHARGING.
- Mix the electrolyte solution on all 6 cells by using a siphon to suction the electrolyte from the battery and then put it back in.
- Use a scope type specific gravity battery meter (refractometer) to measure all six cells.
- Is the cell with lowest electrolyte specific gravity 1.25 or more?
- – Yes – The battery is fully charged.
- – No – Go to next step.
- Is the cell with lowest electrolyte specific gravity less than 1.17?
- – Yes – The battery may be faulty. If however, the battery is under warranty, you must use the Midtronics GR-8 tester as it uses a more accurate method of testing. Proceed to Q85/Q110 BATTERY TEST AND BATTERY CHARGING to accurately test the battery. If the Midtronics GR-8 tester fails the battery it will generate a battery failure code for warranty claim submission.
- – No – The battery requires charging. Proceed to Q85/T110 BATTERY TEST AND BATTERY CHARGING.
Q85/T110 BATTERY INSPECTION WITHOUT GR-8
If the GR8 Battery Management System is not available to test a Q85/T110 battery, refer to MS3 online or Workshop Manual section 01-17.
Q85/T110 BATTERY CHARGING WITHOUT GR-8
If the GR8 Battery Management System is not available to charge a Q85/T110 battery, refer to MS3 online or Workshop Manual section 01-17.
Q85/T110 BATTERY JUMP START
If a jump start is necessary, do not remove the jumper cables or drive the vehicle until the instrument cluster Multi-Information Display (Mazda6) or touchscreen (Mazda3) warning message i-ELOOP charging is no longer displayed. This process takes about 3 minutes to complete.
Q85/T110 NEGATIVE BATTERY CABLE DISCONNECT
- Record audio memory.
- Switch the ignition off.
- Disconnect the current sensor connector (A) from the current sensor (B).
- Disconnect the negative battery cable terminal (C).
Q85/T110 NEGATIVE BATTERY CABLE CONNECTION
- Connect the negative battery cable terminal (C).
- Connect the current sensor connector (A) to the current sensor (B).
- Switch the ignition ON.
- Perform the power window system initial setting.
- Perform the sunroof system initial setting (if equipped).
- Set the clock.
- Set audio memory.
- Perform the tire pressure monitoring system (TPMS) initialization.
Q85/T110 OPERATION REQUIRED AFTER BATTERY REPLACEMENT
When replacing the battery, perform the following procedure. When replacing the PCM simultaneously, perform the PCM configuration first.
- Switch the ignition ON (engine off).
- Shift the selector lever to the N position.
- Perform the following work with the brake pedal depressed.
- Depress the accelerator pedal for 5 s or more.
- Verify that the charging system warning light and the master warning light flash.
- Depress and release the accelerator pedal 3 times.
- Verify that the charging system warning light illuminates and the master warning light turns off.
- Switch the ignition OFF and disconnect the negative battery cable. Refer to Q85/T110 NEGATIVE BATTERY CABLE DISCONNECT.
- Connect the negative battery cable. Refer to Q85/T110 NEGATIVE BATTERY CABLE CONNECTION.
SPECIAL SERVICE TOOL (SST) INFORMATION
| Part Number | Description | Qty. | Image |
| MTRGR81291KT | GR-8 Battery Management System | 1 |
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Last update on 2026-05-27 / Affiliate links / Images from Amazon Product Advertising API
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Would appreciate any information you can share wrt i -eloop battery system in my 2015 Mazda 6 SkyActiv. This is crazy that there is no English words on the battery, can’t seem to find a replacement or anyone who can explain the Display: Battery Management System Inspection Required.
Car struggles to start but does start. Standing voltage 12.7, Charging Voltage 14.0
Plates covered with electrolyte. Dealership states test equipment to check i-eloop Out Of Service. Also Understand that Mazda has discontinued after 2016.Need help
Thank you
Should be an Q85/T110 Battery.
https://www.centurybatteries.com.au/resources/battery-finderhttp://mazda.oemdtc.com/product/battery/q85/info
Yes send me all the information on the I-eloop battery system so I can inform my self on the system and how it works. thanks