Subaru Crosstrek Service Manual: Dtc c1531 bls off stuck

DTC detecting condition:

Defective stop light switch

Trouble symptom:

• ABS does not operate.

• VDC does not operate.

• Hill start assist does not operate.

1.CHECK STOP LIGHT SWITCH.

Check the stop light switch. Stop Light Switch > INSTALLATION">

Is the check result OK?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1531 BLS OFF STUCK">Go to Step 2.

Adjust the installation position of the stop light switch. Stop Light Switch > INSTALLATION">

2.CHECK STOP LIGHT SWITCH.

1) Turn the ignition switch to OFF.

2) Disconnect the stop light switch connector.

3) Measure the resistance of stop light switch terminals.

Terminals

No. 3 — No. 4:

Is the resistance 1 ? or less when the switch is ON (when pedal is depressed)?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1531 BLS OFF STUCK">Go to Step 3.

Replace the stop light switch. Stop Light Switch">

3.CHECK STOP LIGHT POWER SUPPLY.

Measure the voltage between stop light switch terminal and chassis ground.

Connector & terminal

(B65) No. 3 (+) — Chassis ground (−):

Is the voltage 10 — 15 V?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1531 BLS OFF STUCK">Go to Step 4.

Repair the stop light power supply circuit.

4.CHECK STOP LIGHT SWITCH HARNESS (CHECK FOR OPEN CIRCUIT).

1) Disconnect the connector from the VDCCM&H/U.

2) Measure the resistance between VDCCM&H/U and stop light switch.

Connector & terminal

(B65) No. 4 — (B310) No. 30:

Is the resistance less than 1 ??

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1531 BLS OFF STUCK">Go to Step 5.

Repair the stop light switch circuit.

5.CHECK POOR CONTACT OF CONNECTORS.

Is there poor contact of connector between stop light switch and VDCCM&H/U?

Repair the connector.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1531 BLS OFF STUCK">Go to Step 6.

6.CHECK VDCCM&H/U.

1) Connect all connectors.

2) Perform the Clear Memory Mode. Clear Memory Mode">

3) Perform the Inspection Mode. Inspection Mode">

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

Is the same DTC displayed?

Replace the VDCCM only. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) > REPLACEMENT">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1531 BLS OFF STUCK">Go to Step 7.

7.CHECK DETECTION OF OTHER DTCS FOR VDC.

Read Diagnostic Trouble Code (DTC)">

Is any other DTC displayed?

Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)">

Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.

Dtc c1431 at

Dtc c1532 bls on stuck

Other materials:

Removal
FUEL INJECTION (FUEL SYSTEMS)(H4DO) > Fuel Filler PipeREMOVALWARNING:Place “NO OPEN FLAMES” signs near the working area.CAUTION:Be careful not to spill fuel.1. Release the fuel pressure. Fuel > PROCEDURE">2. Drain fuel. Fuel > PROCEDURE">3. Disconnect the groun ...

Sun visor extension plate (models with the EyeSight system)
With the sun visor positioned over the side window, you can use the sun visor extension plate to prevent glare through the gap between the sun visor and center pillar. To use the extension plate, pull it toward the rear of the vehicle. When you have finished using it, stow it by pushing it ...

Removal
CLUTCH SYSTEM > Clutch SwitchREMOVALCAUTION:Before handling the airbag system components, refer to “CAUTION” of “General Description” in “AIRBAG SYSTEM”. General Description > CAUTION">1. Turn the ignition switch to OFF.2. Disconnect the ground cabl ...