B2603

B2603 SHIFT POSITION STATUS

Description

BCM confirms the shift position with the following 4 signals.
- Selector lever
- Transmission range switch
- P position signal from IPDM E/R (CAN)
- P position signal from TCM (CAN)


DTC Logic


DTC DETECTION LOGIC

NOTE:
- If DTC B2603 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to "BCM : DTC Logic" Security System.
- If DTC B2603 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to "BCM : DTC Logic" Security System.






DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

1.Start the engine under the following conditions and wait for at least 1 second.
-Selector lever is in the P position.
-Do not depress the brake pedal.
2.Check "Self diagnostic result" with CONSULT.
Is DTC detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK DTC WITH TCM

Check "Self diagnostic result" with CONSULT. Refer to "DTC Index" Testing and Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace the malfunctioning parts.

2. CHECK TRANSMISSION RANGE SWITCH CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect TCM connector and BCM connector.
3.Check continuity between TCM harness connector and BCM harness connector.





4.Check continuity between TCM harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace harness or connector.

3. CHECK A/T SHIFT SELECTOR POWER SUPPLY

1.Disconnect A/T shift selector (detention switch) connector.
2.Check voltage between A/T shift selector (detention switch) harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.

4. CHECK A/T SHIFT SELECTOR POWER SUPPLY CIRCUIT

1.Disconnect BCM connector.
2.Check continuity between A/T shift selector (detention switch) harness connector and BCM harness connector.





3.Check continuity between A/T shift selector (detention switch) harness connector and ground.





Is the inspection result normal?
YES- Replace BCM. Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace harness or connector.

5. CHECK A/T SHIFT SELECTOR CIRCUIT

1.Disconnect BCM connector and IPDM E/R connector.
2.Check continuity between A/T shift selector (detention switch) harness connector and BCM harness connector.





3.Check continuity between A/T shift selector (detention switch) harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace harness or connector.

6. CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)

Refer to "Component Inspection" .
Is the inspection result normal?
YES- GO TO 7.
NO- Replace A/T shift selector. Refer to "Removal and Installation" Removal and Installation.

7. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
- INSPECTION END


Component Inspection


1. CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)

1.Turn ignition switch OFF.
2.Disconnect A/T shift selector connector.
3.Check continuity between A/T shift selector (detention switch) terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace A/T shift selector (detention switch). Refer to "Removal and Installation" Removal and Installation.