Subaru Crosstrek Service Manual: Dtc b1820 short in side airbag rh

Diagnosis start condition:

Ignition voltage is 10 V to 16 V.

DTC detecting condition:

• Side airbag harness (RH) circuit is shorted.

• Side airbag module (RH) is faulty.

• Airbag control module is faulty.

Before performing diagnosis, refer to “CAUTION” in “General Description”. General Description > CAUTION">

1.CHECK POOR CONTACT OF CONNECTORS.

Check for poor contact of the connectors between the airbag control module, side airbag module RH and the side airbag sensor RH.

Is there poor contact?

Replace the airbag rear harness along with body harness.

Diagnostic Chart with Trouble Code > DTC B1820 SHORT IN SIDE AIRBAG RH">Go to Step 2.

2.CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.

2) Disconnect the connector (AB24) from the side airbag module (RH), and connect the connector (1AJ) in the test harness AJ to connector (AB24).

3) Connect the airbag resistor to the test harness AJ connector (3AJ).

4) Connect the battery ground terminal and turn the ignition switch to ON.

Does the airbag warning light illuminate for 6 seconds and go off?

Replace the side airbag module (RH). Side Airbag Module > REMOVAL">

Diagnostic Chart with Trouble Code > DTC B1820 SHORT IN SIDE AIRBAG RH">Go to Step 3.

3.CHECK AIRBAG REAR HARNESS (SIDE AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.

2) Disconnect the connector (AB26) from seat belt pretensioner (RH).

3) Disconnect the connector (AB33) from curtain airbag module (RH).

4) Disconnect the airbag resistor from test harness AJ.

5) Disconnect the connectors (AB6, AB17, AB18) from airbag control module.

6) Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18).

7) Measure the resistance between connector (5AG) in the test harness AG and chassis ground.

Connector & terminal

(5AG) No. 5 — (5AG) No. 7:

Is the resistance 1 M? or more?

Diagnostic Chart with Trouble Code > DTC B1820 SHORT IN SIDE AIRBAG RH">Go to Step 4.

Replace the airbag rear harness along with body harness.

4.CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory. Clear Memory Mode">

3) Perform the Inspection Mode. Inspection Mode">

4) Read the DTC. (Current malfunction) Read Diagnostic Trouble Code (DTC)">

Is DTC B1820 displayed?

Replace the airbag control module. Airbag Control Module">

Diagnostic Chart with Trouble Code > DTC B1820 SHORT IN SIDE AIRBAG RH">Go to Step 5.

5.CHECK FOR ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check DTC using “List of Diagnostic Trouble Code (DTC)”. List of Diagnostic Trouble Code (DTC)">

Finish the diagnosis.

Dtc b1818 short in passenger s airbag dual stage - 2nd step circuit (to +b)

Dtc b1821 open in side airbag rh

Other materials:

Disassembly
CONTINUOUSLY VARIABLE TRANSMISSION(TR580) > Forward Clutch AssemblyDISASSEMBLY1. FORWARD CLUTCH ASSEMBLY1. Remove the snap ring.2. Remove the retaining plate, drive plate, driven plate and dish plate.3. Compress the return spring using the ST to remove the snap ring.ST1 18762AA010COMPRESSOR SP ...

Headlight flasher
CAUTION Do not hold the lever in the flashing position for more than just a few seconds. To flash the headlights, pull the lever toward you and then release it. The high beam will stay on for as long as you hold the lever. The headlight flasher works even though the lighting switch is in ...

Preparation tool
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)(H4DO) > General DescriptionPREPARATION TOOL1. GENERAL TOOLTOOL NAMEREMARKSCircuit testerUsed for measuring resistance, voltage and current. ...