Subaru Crosstrek Service Manual: Dtc b1618 front sub sensor lh initialization error

Diagnosis start condition:

Ignition voltage is 10 V to 16 V.

DTC detecting condition:

• Open or short circuit in harness of front sensor bus (LH)

• Front sub sensor (LH) 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 (AB6, AB13) between the airbag control module and the front sub sensor (LH).

Is there poor contact?

Replace the airbag main harness along with body harness.

Diagnostic Chart with Trouble Code > DTC B1618 FRONT SUB SENSOR LH INITIALIZATION ERROR">Go to Step 2.

2.CHECK AIRBAG MAIN HARNESS (FRONT SENSOR BUS LH).

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

2) Remove the instrument panel lower cover and column cover, and disconnect the connectors (AB7) and (AB2).

3) Remove the console front panel and disconnect the connector (AB9).

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

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

6) Disconnect the connector (AB13) from the front sub sensor (LH), and then connect the connector (1H) in the test harness H to connector (AB13).

7) Measure the resistance between connector (4AG) in the test harness AG and connector (3H) in the test harness H.

Connector & terminal

(4AG) No. 7 — (3H) No. 5:

(4AG) No. 9 — (3H) No. 6:

Is the resistance less than 10 ??

Diagnostic Chart with Trouble Code > DTC B1618 FRONT SUB SENSOR LH INITIALIZATION ERROR">Go to Step 3.

Replace the airbag main harness along with body harness.

3.CHECK AIRBAG MAIN HARNESS (FRONT SENSOR BUS LH).

Measure the resistance between connector (4AG) in the test harness AG and chassis ground, and the resistance between connector (4AG) terminals in the test harness AG.

Connector & terminal

(4AG) No. 7 — Chassis ground:

(4AG) No. 9 — Chassis ground:

(4AG) No. 7 — (4AG) No. 9:

Is the resistance 1 M? or more?

Diagnostic Chart with Trouble Code > DTC B1618 FRONT SUB SENSOR LH INITIALIZATION ERROR">Go to Step 4.

Replace the airbag main 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 B1618 displayed?

Replace the front sub sensor (LH). Front Sub Sensor > REMOVAL"> Replace the airbag control module if not operating normally even after replacing the sensor. Airbag Control Module > REMOVAL">

Diagnostic Chart with Trouble Code > DTC B1618 FRONT SUB SENSOR LH INITIALIZATION ERROR">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”. List of Diagnostic Trouble Code (DTC)">

Finish the diagnosis.

Dtc b1617 front sub sensor lh lost communication

Dtc b16f2 front sub sensor rh recognition error

Other materials:

Dtc p0512 starter (switch) request circuit
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0512 STARTER (SWITCH) REQUEST CIRCUITDTC detecting condition:Immediately at fault recognitionTrouble symptom:Failure of engine to startCAUTION:After servicing or replacing faulty parts, perform Clear Memory M ...

Dtc p0747 pressure control solenoid "a" stuck on
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0747 PRESSURE CONTROL SOLENOID "A" STUCK ONDTC detecting condition:Detected when two consecutive driving cycles with fault occur.Trouble symptom:• Acceleration is poor du ...

Removal
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)(H4DO) > PCV ValveREMOVALCAUTION:Do not remove unless the PCV valve is broken.1. Disconnect the PCV hose from the intake manifold and the PCV valve, and then remove the PCV hose.2. Remove the clip (A) holding the air breather hose from the engine ha ...