Subaru Crosstrek Service Manual: Dtc b2a0a red led circuit

Diagnosis start condition:

When ACC is ON.

DTC detecting condition:

• Current in LED is less than 1 mA. (Improper LED connection, etc.)

• Current is more than 200 mA for at least 50 ms. (Short-circuited LED, etc.)

For the coupling connector, refer to “WIRING SYSTEM”.

CommCheck is required after replacing the DCM. Telematics System > OPERATION">

1.CHECK DTC.

Read the DTC. Diagnostic Code(s) Display">

Is DTC B2A0A displayed? (Current malfunction)

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0A RED LED CIRCUIT">Go to Step 2.

Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

2.PERFORM THE SYSTEM OPERATION CHECK.

Perform [RED LED Lighting] in the system operation check mode. System Operation Check Mode">

Does the RED LED illuminate?

Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0A RED LED CIRCUIT">Go to Step 3.

3.CHECK HARNESS (OPEN CIRCUIT).

1) Turn the ignition switch to OFF.

2) Disconnect the telematics button connector.

3) Disconnect the DCM connector.

4) Measure the resistance between telematics button connector and DCM connector.

Connector & terminal

(i270) No. 13 — (AD2) No. 7:

(AD2) No. 1 — Chassis ground:

Is the resistance 1 ? or less?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0A RED LED CIRCUIT">Go to Step 4.

Repair or replace the open circuit of harness.

4.CHECK HARNESS (GROUND SHORT CIRCUIT).

Measure the resistance between DCM connector and chassis ground.

Connector & terminal

(i270) No. 13 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0A RED LED CIRCUIT">Go to Step 5.

Repair or replace the short circuit of the harness.

5.CHECK THE CONNECTOR (SHORT CIRCUIT TO POWER SUPPLY).

Measure the voltage between DCM connector and chassis ground.

Connector & terminal

(i270) No. 13 (+) — Chassis ground (−):

(AD2) No. 1 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0A RED LED CIRCUIT">Go to Step 6.

Repair or replace the short circuit of the harness.

6.CHECK THE TELEMATICS BUTTON (LED) UNIT.

Measure the resistance of the telematics button (LED) unit.

Terminals

No. 7 — No. 1:

Is there continuity?

Replace the DCM. Data Communication Module">

Replace the telematics button. Switches and Harness">

Dtc b2a09 i-call button circuit

Dtc b2a0b green led circuit

Other materials:

Inspection
ENTERTAINMENT > Switches and HarnessINSPECTION1. SATELLITE SWITCH ASSEMBLY1. Measure the resistance between connector terminals.Preparation tool:Circuit testerTerminal No.Inspection conditionsStandard6 — 2VOL (+)VOL (−)SEEK (›)SEEK (‹)LISTRETURNA circuit is all OFF.Approx. 1 ...

Location
WIPER AND WASHER SYSTEMS > Relay and FuseLOCATIONMain fuse boxFuse 30 A (wiper)(A)Relay & fuse boxFuse 7.5 A (wiper)(B)Relay holderWiper relay(C)NOTE:For other related fuses, refer to the wiring diagram. Power Supply Circuit"> ...

Removal
ENTERTAINMENT > Front SpeakerREMOVAL1. TWEETER1. Disconnect the ground cable from battery. NOTE">2. Remove the speaker assembly - tweeter.(1) Release the clips and claws, then detach the grille speaker side.NOTE:Remove the grille speaker side by using a plastic remover.(2) Remove the scr ...