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:

Driving history registration
The items in the driving history can be registered. To change the items, operate the "  " or " " switch, and then push the button. 1. Turn the ignition switch to the "ON" position. 2. Push and hold the   button to show the selection screen. 3. After the selection scr ...

Assembly
MANUAL TRANSMISSION AND DIFFERENTIAL(5MT) > Reverse Check SleeveASSEMBLY1. Install the return spring (1st-2nd), return spring cap, reverse accent shaft, reverse check cam, return spring (5th-Reverse) and reverse check spring.NOTE:Be sure to insert the curved part of reverse check spring into the ...

Inspection
FUEL INJECTION (FUEL SYSTEMS)(H4DO) > Electronic Throttle Control RelayINSPECTION1. Check that the electronic throttle control relay has no deformation, cracks or other damages.2. Measure the resistance between electronic throttle control relay terminals.Terminal No.Standard1 and 21 M? or more3 a ...