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. With Intelligent Key System.
- If DTC B2603 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. With Intelligent Key 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
1. Turn ignition switch ON under the following conditions and wait 1 second or more.
- Selector lever is in the P or N position
- Do not depress brake pedal
2. Check "Self-diagnosis result" using CONSULT-III.
Is DTC detected?
YES - Go to B2603.
NO - GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE 2
1. After step 1 of DTC confirmation procedure, shift selector lever to a position other than P or N
2. Check "Self-diagnosis result" using CONSULT-III.
Is DTC detected?
YES - Go to B2603.
NO - INSPECTION END




Diagnosis Procedure
1.INSPECTION START
Perform inspection in accordance with procedure that confirms DTC.
Which procedure confirms DTC?
DTC confirmation procedure 1-GO TO 2.
DTC confirmation procedure 2-GO TO 7.
2.CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect transmission range switch connector.
3. Turn ignition switch ON.
4. Check voltage between transmission range switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 3.
3.CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between transmission range switch harness connector and IPDM E/R harness connector.





4. Check continuity between transmission range switch harness connector and ground.





Is the inspection result normal?
YES - Check 10 A fuse (No. 56, located in the IPDM E/R).
NO - Repair or replace harness.
4.CHECK BCM INPUT SIGNAL
1. Turn ignition switch OFF.
2. Connect transmission range switch connector.
3. Turn ignition switch ON.
4. Check voltage between BCM harness connector and ground.





Is the inspection result normal?
YES - Replace BCM. Removal And Installation.
NO - GO TO 5.
5.CHECK BCM INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect transmission range switch connector.
3. Check continuity between transmission range switch harness connector and BCM harness connector.





4. Check continuity between transmission range switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace harness.
6.CHECK TRANSMISSION RANGE SWITCH
B2603.
Is the inspection result normal?
YES - GO TO 12.
NO - Replace transaxle assembly. Exploded View.
7.CHECK CVT SHIFT SELECTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect CVT shift selector (detention switch) connector.
3. Check voltage between CVT shift selector (detention switch) harness connector and ground.





Is the inspection result normal?
YES - GO TO 9.
NO - GO TO 8.
8.CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between CVT shift selector (detention switch) harness connector and BCM harness connector.





3. Check continuity between CVT shift selector (detention switch) harness connector and ground.





Is the inspection result normal?
YES - Replace BCM. Removal And Installation.
NO - Repair or replace harness.
9.CHECK CVT SHIFT SELECTOR CIRCUIT (BCM)
1. Disconnect BCM connector and IPDM E/R connector.
2. Check continuity between CVT shift selector (detention switch) harness connector and BCM harness connector.





3. Check continuity between CVT shift selector (detention switch) harness connector and ground.





Is the inspection result normal?
YES - GO TO 10.
NO - Repair or replace harness.
10.CHECK CVT SHIFT SELECTOR CIRCUIT (IPDM E/R)
Check continuity between CVT shift selector (detention switch) harness connector and IPDM E/R harness connector.





Is the inspection result normal?
YES - GO TO 11.
NO - Repair or replace harness.
11.CHECK CVT SHIFT SELECTOR (DETENTION SWITCH)
B2603.
Is the inspection result normal?
YES - GO TO 12.
NO - Replace CVT shift selector. Removal And Installation.
12.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END




Component Inspection (Transmission Range Switch)
1.CHECK TRANSMISSION RANGE SWITCH
1. Turn ignition switch OFF.
2. Disconnect transmission range switch connector.
3. Check continuity between transmission range switch terminals.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace transaxle assembly. Exploded View.




Component Inspection [CVT Shift Selector (Detention Switch)]
1.CHECK CVT SHIFT SELECTOR (DETENTION SWITCH)
1. Turn ignition switch OFF.
2. Disconnect CVT shift selector connector.
3. Check continuity between CVT shift selector (detention switch) terminals.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace CVT shift selector. Removal And Installation.