Measurement of Dark Current (Standby Current Draw) – 2019-2021 Subaru

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NHTSA ID Number: 10226833

Manufacturer Communication Number: 07-199-21R

Summary

This Bulletin provides additional information for the diagnostic procedures concerning measurement of Dark Current (a.k.a. Standby Current).

 


NUMBER: 07-199-21R
DATE: 07/30/21
REVISED: 11/02/22

APPLICABILITY: 2020-2021MY Outback
2019-2021MY Forester
2019-2021MY Ascent
SUBJECT: Measurement of Dark Current
(Standby Current Draw)

 

INTRODUCTION:

This Service Information Bulletin provides additional information for the diagnostic procedures concerning measurement of Dark Current (a.k.a. Standby Current).  Customer concerns of batteries going dead over a period of time should be diagnosed using this procedure after any obvious contributing factors have been eliminated.  The following information is provided to help avoid unnecessary parts replacement.  The following is to be used as supplemental information and is not intended to replace the more detailed procedures supplied in the applicable Service Manual.

 

SERVICE PROCEDURE / INFORMATION:

REMINDER:  Customer satisfaction and retention starts with performing quality repairs.

When a dead battery condition is experienced due to excessive Dark Current (Standby Current) draw and the source is traced to the VDC and/ or Power Rear Gate Control Module, it is IMPORTANT to follow the procedures outlined in the applicable Service Manual: Engine > STARTING/CHARGING SYSTEM > Battery > INSPECTION, in conjunction with the additional diagnostic information provided below.

 

NOTE:

  • These Flow Charts are to be used in addition to the applicable Service Manual procedures.
  • Prepare the vehicle with the hood up, door(s) open, and the rear gate open. Confirm all associated latches are in the “latched” position. This will help reduce unwanted battery resets.
  • ALWAYS set the power supply voltage to 13.5 Volts when using Power Supply Mode.
    NEVER turn the ignition switch on when charging at voltages 15 Volts or higher.
  • The Trouble trees below should only be used if excessive dark current is identified AFTER waiting the appropriate time outlined in the Service Manual.

 

Fuse and Relay Information:

 

NOTE 1)  Troubleshooting Tree for Dark Current (Standby Current) draw from VDC system.

 

NOTE 2)  How to check resistance between EPB switch terminals.

  • Confirm the ignition is switch OFF:
  • Disconnect the EPB switch connector, and check if Dark Current decreases. If Dark Current decreases by disconnecting the EPB switch connector, replace EPB switch and continue diagnosis.
  • Check resistance between terminals per the illustrations below.

 

Required Tool: DVOM

Switch Position Terminal No. Standard
Neutral 1-2

4-5

1MΩ and higher
1-5

2-4

Less than 1Ω

 

NOTE 3)  How to check resistance between harness connector terminals for EPB Switch:

  • Check the resistance between terminals per the illustrations below.

 

No. 1     –    No. 2

No. 4     –    No. 5

Specification: 1MΩ or more

 

NOTE 4)  Troubleshooting Tree for excessive Dark Current draw from Power Rear Gate system:

 

NOTE 5)  How to check resistance between terminals for Courtesy Switch.

  • Check the resistance between the terminals specified in the charts below.

 

Terminal No. Inspection Conditions Specification
7 to 8 Open Less Than 1 Ω
7 to 8 Half Less Than 1 Ω
7 to 8 Full 1MΩ or More

 

Terminal No. Inspection Conditions Specification
5 to 4 Open Less Than 1 Ω
Half Less Than 1 Ω
Full 60 MΩ or More

 

IMPORTANT NOTE: Whenever reconnecting the ground cable terminal to the battery sensor, torque to 7.5Nm (5.5ft.-lbs. or 66inch-lbs.) while supporting the sensor with the other hand as outlined in the applicable Service Manual under: STARTING/CHARGING SYSTSEMS > Battery Sensor.

 


8 Affected Products

Vehicles

MAKE MODEL YEAR
SUBARU ASCENT 2019-2021
SUBARU FORESTER 2019-2021
SUBARU OUTBACK 2020-2021

 


1 Associated Document

Manufacturer Communications

NUMBER: 07-199-21R
DATE: 07/30/21
REVISED: 11/02/22

https://www.nhtsa.gov/recalls?nhtsaId=10226833

MC-10226833-0001.pdf 1811.78KB

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NHTSA ID Number: 10225733

Manufacturer Communication Number: 07-199-21R

Summary

This Bulletin provides additional information for the diagnostic procedures concerning measurement of Dark Current (a.k.a. Standby Current).

 

1 Associated Document

Manufacturer Communications

NUMBER: 07-199-21R
DATE: 07/30/21
REVISED: 10/03/22

https://www.nhtsa.gov/recalls?nhtsaId=10225733

MC-10225733-0001.pdf 1906.325KB

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NHTSA ID Number: 10201793

Manufacturer Communication Number: 07-199-21R

Summary

This bulletin provides additional information for the diagnostic procedures concerning measurement of dark current (a.k.a. standby current).

1 Associated Document

Manufacturer Communications

NUMBER: 07-199-21R
DATE: 07/30/21
REVISED: 09/08/21

https://www.nhtsa.gov/recalls?nhtsaId=10201793

MC-10201793-0001.pdf 1502.994KB

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NHTSA ID Number: 10201052

Manufacturer Communication Number: 07-199-21R

Summary

This bulletin provides additional information for the diagnostic procedures concerning measurement of dark current (standby current).

 

1 Associated Document

Manufacturer Communications

NUMBER: 07-199-21R
DATE: 07/30/21
REVISED: 08/31/21

https://www.nhtsa.gov/recalls?nhtsaId=10201052

MC-10201052-0001.pdf 1504.019KB

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NHTSA ID Number: 10219499

Manufacturer Communication Number: 07-199-21R

Summary

This Service Information Bulletin provides additional information for the diagnostic procedures concerning measurement of Dark Current (a.k.a. Standby Current).

 

1 Associated Document

Manufacturer Communications

NUMBER: 07-199-21R
DATE: 07/30/21
REVISED: 08/23/22

https://www.nhtsa.gov/recalls?nhtsaId=10219499

MC-10219499-0001.pdf 1905.501KB

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NHTSA ID Number: 10199935

Manufacturer Communication Number: 07-199-21

Summary

This bulletin provides additional information for the diagnostic procedures concerning measurement of Dark Current (a.k.a. Standby Current).

 

1 Associated Document

Manufacturer Communications

NUMBER: 07-199-21
DATE: 07/30/21

https://www.nhtsa.gov/recalls?nhtsaId=10199935

MC-10199935-0001.pdf 1465.36KB

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