STARLINK® Telematics Remote Engine Start Only Runs 15 Seconds After Successful Engine Start – All Gen2 Telematic

NHTSA ID Number: 10219482

Manufacturer Communication Number: 15-300-22

Summary

This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES). All Gen2 Telematic equipped models.

 


NUMBER: 15-300-22
DATE:  08/29/22

APPLICABILITY: All Gen2 Telematic Equipped Models
SUBJECT: STARLINK® Telematics Remote Engine Start Only runs 15 seconds after successful engine start

 

INTRODUCTION:

This Service Information Bulletin provides the diagnostic procedure for the STARLINK® Remote

Engine Start (RES).  In some cases, after successfully initiating STARLINK® Telematics Remote Engine Start, the vehicle will run for only 15 seconds and then turn off. The information contained in this bulletin is only to be used when diagnosing this described condition.  The information in this bulletin DOES NOT apply to the Subaru Long Range Remote Start Accessory.

Applicability
Model MY 2016 MY 2017 MY 2018 MY 2019 MY 2020 MY 2021 MY 2022
Ascent n/a n/a n/a Gen 2 Gen 2 Gen 2 Gen 2
Crosstrek Gen 1 Gen 1 Gen 1 Gen 2 Gen 2 Gen 2 Gen 2
Crosstrek Hybrid n/a n/a n/a Gen 2 Gen 2 Gen 2 Gen 2
Forester Gen 1 Gen 1 Gen 1 Gen 2 Gen 2 Gen 2 Gen 2
Impreza Gen 1 Gen 1 Gen 1 Gen 2 Gen 2 Gen 2 Gen 2
Legacy Gen 1 Gen 1 Gen 1 Gen 1 Gen 2 Gen 2 Gen 2
Outback Gen 1 Gen 1 Gen 1 Gen 1 Gen2 Gen 2 Gen 2
WRX n/a Gen 1 Gen 1 Gen 1 Gen 1 Gen 1 Gen 2
BRZ n/a n/a n/a n/a n/a n/a Gen 2

 

Service Procedure / Information:

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

The use of this document relies heavily on electrical system information, wiring schematics, diagrams, components connector locations and testing methods that are found in the Body & Electrical / Wiring System Sections of the Subaru Technical Information System (STIS). A Technician should be proficient with their use of STIS and possess advanced electrical diagnosis skills before attempting to use this document. Due to the complexity of the test procedure and the electrical systems involved, it is essential that the Technician practices strict adherence to the process and take particular care not to introduce a secondary fault(s) into these systems. Any improper testing methodology could lead to unnecessary component damage/replacement or harness damage. When engaging Techline with questions, be prepared with DVOM measurements or oscilloscope patterns for every step of the diagnostic procedure. Failure to provide accurate measurements and review of your testing methodology will significantly impede Techline’s ability to provide efficient support.

IMPORTANT: This procedure looks for incorrect or induced voltages to the circuit by outside influence on the Data Control Module (DCM), Keyless Access Control Module (KACM), Engine Control Module (ECM), and Body Integrated Unit (BIU) power supply circuits. Taking extra time inspecting the vehicle for aftermarket accessories installed is critical, so that test results are not skewed. Accessories such as backup cellphone batteries plugged into USB ports or battery jump packs plugged into 12V charging ports can back feed voltage and influence vehicle operation, including the test results.

The retailer should secure the use of the customer’s MySubaru account during the diagnosis for this concern. There will be significant STARLINK® Remote Engine Start use during diagnosis and repair. Relying only on the customer to perform RES is inefficient and unreliable for this testing.

CRITICAL: Use of this trouble tree assumes that the telematics system is clear of any current DTCs and passes operational checks other than expected remote engine start operation. If there are any current telematics DTCs or observed unexpected behavior, consult with Techline or your Field Service Engineer prior to use of this trouble tree.

 

1. PRELIMINARY CHECKS

1. Confirm there are no aftermarket accessories installed in the vehicle.

2. Make sure nothing is plugged into any of the USB ports.

3. Make sure a cell phone is not sitting on the charging pad if equipped.

4. Pull Fuse No. 4 in passenger side fuse box.

5. With Push Button off and Engine Off check both sides of Fuse No. 4 in the passenger side fuse panel for voltage by applying the negative test lead to ground  and the positive lead to both sides of the fuse.

IS VOLTAGE AT FUSE NO. 4 GREATER THAN 1 VOLT?

YES: Go to Step 2: ACCESSORY RELAY NO. 1.

NO: 0 V found at both sides of Fuse No. 4. Go to Step 6: KACM A19

 

2. ACCESSORY RELAY NO. 1

1. Remove accessory relay 1 from passenger side fuse panel.

2. With Push Button off and Engine Off check both sides of Fuse No. 4 in the passenger side fuse panel for voltage by applying the negative test lead to ground  and the positive lead to both sides of the fuse.

IS VOLTAGE AT FUSE NO. 4 GREATER THAN 1 VOLT?

YES: Go to Step 3: ACCESSORY FUSE.

NO: Go to Step 2a: ACCESSORY RELAY NO. 1 PART 2.

 

2a. ACCESSORY RELAY NO. 1, PART 2

1. Swap accessory relay 1 with accessory relay 2.

2. With Push Button off and Engine Off check both sides of Fuse No. 4 in the passenger side fuse panel for voltage by applying the negative test lead to ground  and the positive lead to both sides of the fuse.

IS VOLTAGE AT FUSE NO. 4 GREATER THAN 1 VOLT?

YES: Go to Step 4: KACM

NO: Replace accessory relay 1 that should now be installed in accessory relay 2 position. Go to Step 8: REINSTALL AND RETEST.

 

3. ACCESSORY FUSE

1. Remove accessory fuse feeding terminal A20 of the DCM from the driver’s side fuse panel.

Ascent / Crosstrek / Forster / Impreza = Fuse No. 54 (ACC)

Legacy / Outback / WRX = Fuse No. 51 (ACC)

2. With Push Button off and Engine Off check both sides of Fuse No. 4 in the  passenger side fuse panel for voltage by applying the negative test lead to ground  and the positive lead to both sides of the fuse.

IS VOLTAGE AT FUSE NO. 4 GREATER THAN 1 VOLT?

YES: Find short to power or unexpected power supply on circuit between Fuse No. 4 of passenger fuse panel and Accessory Fuse feeding terminal A20 of DCM in drivers fuse panel.

NO: Reinstall Accessory Fuse. Determine components fed by Accessory Fuse in drivers fuse box and disconnect them one at a time retesting at Fuse No. 4 after each component is removed to determine if it is the source of the unexpected voltage.

After repair of above findings (either short to power at harness or component supplying unexpected voltage) go to Step 8: REINSTALL AND RETEST.

 

4. KACM

1. Disconnect KACM.

2. With Push Button off and Engine Off check both sides of Fuse No. 4 in the passenger side fuse panel for voltage by applying the negative test lead to ground and the positive lead to both sides of the fuse.

IS VOLTAGE AT FUSE NO. 4 GREATER THAN 1 VOLT?

YES: Go to Step 5: KACM ISOLATION

NO: Replace KACM. Go to Step 8: REINSTALL AND RETEST.

 

5. KACM ISOLATION

1. Remove Accessory relay 1 and accessory relay 2 from the passenger fuse panel.

2. Using DVOM with red lead connected to terminal A16 of KACM connector and black lead connected to the under-hood battery negative terminal measure resistance.

IS RESISTANCE AT TERMINAL A16 LESS THAN 1 MEGA OHM?

YES: Short to ground indicated on circuit. Replace harness.

NO: DVOM indicates OL. Replace KACM. Go to Step 8: REINSTALL AND RETEST.

NOTE: The prerequisite for moving to Step 6: KACM A19 is with Pushbutton off, Engine Off there is no voltage at Fuse No. 4 of the passenger side fuse panel. If voltage is still present at Fuse No. 4 start testing over at Step 1: PRELIMINARY CHECKS or contact Techline for assistance before proceeding.

 

6. KACM A19

1. Measure the voltage change at the A19 terminal (back probing) of the KACM when the remote engine starting operation is performed.

WHAT IS THE VOLTAGE AT TERMINAL A19 OF THE KACM?

Voltage at A19 is always 0 V: Go To Step 6a: KACM A19 ALWAYS 0 VOLTS

Voltage at A19 is always 12 V: Go To Step 6b: KACM A19 ALWAYS 12 VOLTS

Voltage at A19 varies 12V – 0V – 12V: Go To Step 6c: KACM A19 VARYING VOLTAGE.

 

6a. KACM A19 ALWAYS 0 VOLTS

1. Performing step 6.1 the DVOM always read 0 volts at the A19 terminal (back probing) of the KACM when the remote engine starting operation is performed.

IS THE VOLTAGE AT TERMINAL A19 OF KACM ALWAYS 0 VOLTS?

Perform inspection of harness for abnormalities such as open circuit or excessive resistance. Was harness abnormality found?

YES: Replace Harness

NO: Replace KACM. Go to Step 8: REINSTALL AND RETEST.

 

6b. KACM A19 ALWAYS 12 VOLTS

1. Performing step 6.1 the DVOM always read 12 volts at the A19 terminal (back probing) of the KACM when the remote engine starting operation is performed.

IS THE VOLTAGE AT TERMINAL A19 OF KACM ALWAYS 12 VOLTS?

Perform inspection of harness for abnormalities such as short to power. Was harness abnormality found?

YES: Replace Harness

NO: Replace ECM. Go to Step 8: REINSTALL AND RETEST.

 

6c. KACM A19 VARYING VOLTAGE.

1. Performing step 6.1 the DVOM measurement varied 12V – 0V – 12 V at the A19 terminal (back probing) of the KACM when the remote engine starting operation is performed.

IS THE VOLTAGE AT TERMINAL A19 OF KACM VARYING 12V TO 0v TO 12V DURING RES OPERATION?

YES: Go to Step 7: KACM A16

NO: Replace KACM. Go to Step 8: REINSTALL AND RETEST.

 

7. KACM A16

1. Measure voltage at terminal A16 of KACM during remote engine start operation with an oscilloscope.

NOTE: Refer to STIS document MSA5T2101T Subaru Diagnostic Systems (SDS) (June 2021) pages 4-1 through 4-28 for oscilloscope operation.

WHAT IS THE VOLTAGE AT TERMINAL A16 OF THE KACM?

Voltage at A16 is always 0 V: Go To Step 7a: KACM A19 ALWAYS 0 VOLTS.

Voltage at A16 is always 12 V: Go To Step 7b: KACM A19 ALWAYS 12 VOLTS.

Voltage at A16 varies 12V – 0V – 12V: Go To Step 7c: KACM A19 VARYING  VOLTAGE.

 

7a. KACM A16 ALWAYS 0 VOLTS.

1. Performing step 7.1 the oscilloscope always read 0 volts at terminal A16 of KACM during remote engine start operation.

NOTE: Refer to STIS document MSA5T2101T Subaru Diagnostic Systems (SDS) (June 2021) pages 4-1 through 4-28 for oscilloscope operation.

IS THE VOLTAGE AT TERMINAL A16 OF KACM ALWAYS 0 VOLTS?

Perform inspection of harness for abnormalities such as open circuit or  excessive resistance. Was harness abnormality found?

YES: Replace Harness

NO: Replace KACM. Go to Step 8: REINSTALL AND RETEST.

 

7b. KACM A16 ALWAYS 12 VOLTS.

1. Performing step 7.1 the oscilloscope always read 12 volts at terminal A16 of KACM during remote engine start operation.

NOTE: Refer to STIS document MSA5T2101T Subaru Diagnostic Systems (SDS) (June 2021) pages 4-1 through 4-28 for oscilloscope operation.

IS THE VOLTAGE AT TERMINAL A16 OF KACM ALWAYS 12 VOLTS?

Perform inspection of harness for abnormalities such as short to power. Was harness abnormality found?

YES: Replace Harness

NO: Replace KACM. Go to Step 8: REINSTALL AND RETEST.

 

7c. KACM A16 VARYING VOLTAGE.

1. Performing step 7.1 the oscilloscope read 12V – 0V – 12V at terminal A16 of KACM during remote engine start operation with an oscilloscope.

NOTE: Refer to STIS document MSA5T2101T Subaru Diagnostic Systems (SDS) (June 2021) pages 4-1 through 4-28 for oscilloscope operation.

IS THE VOLTAGE AT TERMINAL A16 OF KACM VARYING 12V TO 0v TO 12V DURING RES OPERATION?

Perform inspection of terminal A16 of KACM for abnormalities such as intermittent open, excessive resistance or short to ground. Was harness abnormality found?

YES: Replace Harness

NO: Replace BIU. Go to Step 8: REINSTALL AND RETEST.

 

8. REINSTALL and RETEST.

1. Reinstall all components removed for testing.

2. Retest operation of Remote Engine Start for expected behavior.

DOES RES EXHIBIT BEHAVIOR OF RUNNING 15 SECONDS THEN SHUTTING OFF?

YES: Go to Step 1: PRELIMINARY CHECKS.

NO: If RES starts as expected and runs for the selected period vehicle is repaired and no further action is necessary.

 


19 Affected Products

Vehicles

MAKE MODEL YEAR
SUBARU CROSSTREK 2021-2022
SUBARU CROSSTREK HYBRID 2021-2022
SUBARU FORESTER 2021-2022
SUBARU IMPREZA 2021-2022
SUBARU LEGACY 2021-2022
SUBARU LEVORG 2022
SUBARU OUTBACK 2021-2022
SUBARU SOLTERRA 2023
SUBARU WRX 2021-2022
SUBARU WRX STI 2021-2022
SUBARU XV CROSSTREK 2022

 


1 Associated Document

Manufacturer Communications

NUMBER: 15-300-22
DATE: 08/29/22

https://www.nhtsa.gov/recalls?nhtsaId=10219482

MC-10219482-0001.pdf 1430.85KB

MC-10219482-0001

 


 

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