Honda Civic manuals

Subaru Legacy Service Manual: Dtc b2a0b green 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.)

TROUBLE SYMPTOM:

RED LED illuminates.

WIRING DIAGRAM:

NOTE:

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

Telematics Telematics System > WIRING DIAGRAM

CAUTION:

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

STEPCHECKYESNO

1.CHECK DTC.

Read the DTC. Diagnostic Code(s) Display

Is DTC B2A0B displayed- (Current malfunction)

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT

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 [GREEN LED Lighting] in the system operation check mode. System Operation Check Mode

Does it sound-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT

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.

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. 3 — (AD2) No. 4:
(AD2) No. 1 — Chassis ground:

Is the resistance 1 - or less-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT

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. 3 — Chassis ground:

Is the resistance 1 M- or more-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT

Repair or replace the open circuit of harness.

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

Measure the voltage between DCM connector and chassis ground.

Connector & terminal

(i270) No. 3 (+) — Chassis ground (−):
(AD2) No. 1 (+) — Chassis ground (−):

Is the voltage less than 1 V-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A0B GREEN LED CIRCUIT

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.

Connector & terminal

(AD1) No. 4 — (AD1) No. 1:

Is there continuity-

Replace the DCM. Data Communication Module

Replace the telematics button. Switches and Harness

Dtc b2a0c dcm internal fault
DIAGNOSIS START CONDITION:When ignition switch is ON.DTC DETECTING CONDITION:• Main microcomputer and communication circuit IC cannot communicate. (Defective IPC)• SIM (communication chip) ...

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 ...

Other materials:

Diagnostic procedure for subaru select monitor communication communication for initializing impossible
DIAGNOSIS:Defective CAN communication circuitTROUBLE SYMPTOM:• LAN system is abnormal.• Communication failure between Subaru Select Monitor and A/C CMWIRING DIAGRAM:NOTE:For the coupling connector, refer to “WIRING SYSTEM”.• Air conditioning system Air Conditioning Sys ...

© 2017-2023 Copyright www.sulegacy.com