ABS (DIAGNOSTICS) > Subaru Select Monitor

INSPECTION

1. COMMUNICATION FOR INITIALIZING IMPOSSIBLE

DETECTING CONDITION:

Defective harness connector

TROUBLE SYMPTOM:

Communication is impossible between ABS and Subaru Select Monitor.

WIRING DIAGRAM:

• LHD model

• RHD model

STEPCHECKYESNO

1.CHECK IGNITION SWITCH.

Is the ignition switch ON?

Turn the ignition switch to ON, and select ABS mode using Subaru Select Monitor.

2.CHECK BATTERY.

1) Turn the ignition switch to OFF.

2) Measure the battery voltage.

Is the voltage 11 V or more?

Charge or replace the battery.

3.CHECK BATTERY TERMINAL.

Is there poor contact at the battery terminal?

Repair or tighten the battery terminal.

4.CHECK SUBARU SELECT MONITOR COMMUNICATION.

1) Turn the ignition switch to ON.

2) Using the Subaru Select Monitor, check whether communication to other systems can be executed normally.

Is the system name displayed on Subaru Select Monitor?

5.CHECK SUBARU SELECT MONITOR COMMUNICATION.

1) Turn the ignition switch to OFF.

2) Disconnect the ABSCM&H/U connectors.

3) Turn the ignition switch to ON.

4) Check whether communication to other systems can be executed normally.

Is the system name displayed on Subaru Select Monitor?

Replace the ABSCM&H/U.

6.CHECK HARNESS CONNECTOR BETWEEN EACH CONTROL MODULE AND DATA LINK CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the ABSCM&H/U, ECM and TCM.

3) Measure the resistance between data link connector and chassis ground.

Connector & terminal

(B40) No. 7 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the harness and connector between each control module and data link connector.

7.CHECK ABSCM&H/U OUTPUT SIGNAL.

1) Turn the ignition switch to ON.

2) Measure the voltage between data link connector and chassis ground.

Connector & terminal

(B40) No. 7 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Repair the harness and connector between each control module and data link connector.

8.CHECK HARNESS CONNECTOR BETWEEN ABSCM&H/U AND DATA LINK CONNECTOR.

Measure the resistance between ABSCM&H/U connector and data link connector.

Connector & terminal

(B301) No. 7 — (B40) No. 7:

Is the resistance less than 0.5 Ω?

Repair harness and connector between ABSCM&H/U and data link connector.

9.CHECK INSTALLATION OF ABSCM&H/U CONNECTOR.

Turn the ignition switch to OFF.

Is the ABSCM&H/U connector inserted into ABSCM&H/U until the clamp locks onto it?

Insert ABSCM&H/U connector into ABSCM&H/U.

10.CHECK POWER SUPPLY CIRCUIT.

1) Turn the ignition switch to ON. (engine OFF)

2) Measure the ignition power supply voltage between ABSCM&H/U connector and chassis ground.

Connector & terminal

(B301) No. 18 (+) — Chassis ground (−):

Is the voltage 10 — 15 V?

Repair open circuit of harness between ABSCM&H/U and battery.

11.CHECK HARNESS CONNECTOR BETWEEN ABSCM&H/U AND CHASSIS GROUND.

1) Turn the ignition switch to OFF.

2) Disconnect the ABSCM&H/U connectors.

3) Measure the resistance of the harness between ABSCM&H/U connector and chassis ground.

Connector & terminal

(B301) No. 15 — Chassis ground:

Is the resistance less than 0.5 Ω?

Repair the open circuit and poor contact of the harness between ABSCM&H/U and connector.

12.CHECK POOR CONTACT IN CONNECTOR.

Is there poor contact in the control module power supply, ground circuit and data link connector?

Repair the connector.

Replace the ABSCM only.

2. WITHOUT DTC

DETECTING CONDITION:

• Defective combination meter

• Defective CAN communication

TROUBLE SYMPTOM:

• ABS warning light does not go off.

• “NO TROUBLE CODE” will be displayed on the Subaru Select Monitor.

NOTE:

When the ABS warning light is OFF and “NO TROUBLE CODE” is displayed on Subaru Select Monitor, the system is in normal condition.

STEPCHECKYESNO

1.CHECK SUBARU SELECT MONITOR DATA.

1) Select {Current Data Display & Save} in the Subaru Select Monitor.

2) Read the condition of “ABS warning light”.

Is “ON” indicated?

Replace the ABSCM only.

2.CHECK LAN SYSTEM.

Perform the diagnosis for LAN system.

Is there any fault in LAN system?

Perform the diagnosis according to DTC for LAN system.

3.CHECK POOR CONTACT IN CONNECTOR.

Is there poor contact in ABSCM connector and combination meter connector?

Repair the connector.

Check the combination meter.