Subaru Crosstrek Service Manual: Diagnostics chart for security indicator light Inspection

1. CHECK SECURITY INDICATOR LIGHT CIRCUIT

CAUTION:

When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1.CHECK FUSE.

1) Remove the ignition key from ignition switch. Or, turn off the power.

2) Check the fuse (M/B No. 8).

Is the fuse OK?

Diagnostics Chart for Security Indicator Light > INSPECTION">Go to Step 2.

Replace the fuse. If the replaced fuse blows out easily, repair the short circuit in the harness between the fuse and body integrated unit.

2.CHECK SECURITY INDICATOR LIGHT.

1) Disconnect the connector from body integrated unit.

2) Connect the resistor (100 ?) between the body integrated unit connector terminal (i171) No. 26 and chassis ground.

Does the security indicator light illuminate?

Diagnostics Chart for Security Indicator Light > INSPECTION">Go to Step 3.

Diagnostics Chart for Security Indicator Light > INSPECTION">Go to Step 5.

3.CHECK BODY INTEGRATED UNIT GROUND CIRCUIT (OPEN CIRCUIT).

Measure the resistance between the body integrated unit connector terminal and chassis ground.

Connector & terminal

(B280) No. 1 — Chassis ground:

(i84) No. 1 — Chassis ground:

Is the resistance less than 10 ??

Diagnostics Chart for Security Indicator Light > INSPECTION">Go to Step 4.

Repair the open circuit of the body integrated unit ground circuit.

4.CHECK BODY INTEGRATED UNIT POWER SUPPLY CIRCUIT.

Measure the voltage between the body integrated unit connector terminal and chassis ground.

Connector & terminal

(B281) No. 7 (+) — Chassis ground (−):

(i84) No. 6 (+) — Chassis ground (−):

Is the voltage 10 V or more?

Replace the body integrated unit. Body Integrated Unit">

Check the harness for open or short circuit between body integrated unit and fuse.

5.CHECK COMBINATION METER CIRCUIT.

1) Remove the combination meter. Combination Meter">

2) Measure the voltage between combination meter connector terminal and chassis ground.

Connector & terminal

(i10) No. 40 (+) — Chassis ground (−):

Is the voltage 10 V or more?

Diagnostics Chart for Security Indicator Light > INSPECTION">Go to Step 6.

Check for an open or short circuit in the harness between the combination meter and fuse.

6.CHECK COMBINATION METER CIRCUIT (OPEN).

Measure the resistance between the body integrated unit connector terminal and combination meter connector terminal.

Connector & terminal

(i171) No. 26 — (i10) No. 1:

Is the resistance less than 10 ??

LED bulb is defective. Replace the combination meter case assembly. Combination Meter > DISASSEMBLY">

Repair the harness or connector.

When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1.CHECK POWER SUPPLY CIRCUIT.

1) Disconnect the connector from key warning switch.

2) Measure the voltage between key warning switch connector terminal and chassis ground.

Connector & terminal

(B555) No. 1 (+) — Chassis ground (−):

Is the voltage 10 V or more?

Diagnostics Chart for Security Indicator Light > INSPECTION">Go to Step 2.

Check the harness for an open or short between the key warning switch and fuse.

2.CHECK KEY WARNING SWITCH.

1) Insert the ignition key in the ignition switch. (OFF or ACC)

2) Measure the resistance between key warning switch connector terminals.

Terminals

No. 1 — No. 2:

Is the resistance less than 1 ??

Diagnostics Chart for Security Indicator Light > INSPECTION">Go to Step 3.

Replace the key warning switch. Key Lock Cylinders">

3.CHECK KEY WARNING SWITCH.

1) Remove the ignition key from ignition switch.

2) Measure the resistance between key warning switch connector terminals.

Terminals

No. 1 — No. 2:

Is the resistance 1 M? or more?

Diagnostics Chart for Security Indicator Light > INSPECTION">Go to Step 4.

Replace the key warning switch. Key Lock Cylinders">

4.CHECK HARNESS BETWEEN KEY WARNING SWITCH AND BODY INTEGRATED UNIT (OPEN).

1) Disconnect the connector from body integrated unit.

2) Measure the resistance between key warning switch connector terminal and body integrated unit connector terminal.

Connector & terminal

(B555) No. 2 — (B280) No. 4:

Is the resistance less than 10 ??

Replace the body integrated unit. Body Integrated Unit">

Repair the harness between key warning switch and body integrated unit.

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