B2603

B2603 SHIFT POSITION





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. Body Control System.
- If DTC B2603 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Body Control System.
- If DTC B2603 is displayed with DTC B2601, first perform the trouble diagnosis for DTC B2601. B2601.






DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait 1 second or more.
2. Check "Self-diagnosis result" using CONSULT-III.
Is DTC detected?
YES - Go to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK DTC WITH TCM
Check "Self diagnosis result" with CONSULT-III.
Are any DTC detected?
YES - Testing and Inspection.
NO - GO TO 2.
2.CHECK TRANSMISSION RANGE SWITCH CIRCUIT 1
1. Turn ignition switch OFF.
2. Disconnect A/T assembly connector and BCM connector.
3. Check continuity between A/T assembly harness connector and BCM harness connector.





4. Check continuity between A/T assembly harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace harness.
3.CHECK TRANSMISSION RANGE SWITCH CIRCUIT 2
1. Disconnect TCM connector.
2. Check continuity between TCM harness connector and A/T assembly harness connector.





3. Check continuity between TCM harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace harness.
4.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 6.
NO - GO TO 5.
5.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. Removal And Installation.
NO - Repair or replace harness.
6.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 7.
NO - Repair or replace harness.
7.CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)
B2601.
Is the inspection result normal?
YES - GO TO 8.
NO - Replace A/T shift selector. Removal And Installation.
8.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END