Sedan With Intelligent Key

B2603 SHIFT POSITION STATUS





Description
BCM confirms the shift position with the following 2 signals.
- CVT selector lever
- P/N position switch




DTC Logic

DTC DETECTION LOGIC

NOTE:
- If DTC B2603 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to Sedan With Intelligent Key.
- If DTC B2603 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to Sedan With Intelligent Key.






DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine under the following conditions and wait for at least 1 second.
- CVT selector lever is in the P position.
- Do not depress the brake pedal.
2. Shift to N and wait for at least 1 second.
3. Shift to any gear other than P or N and wait for at least 1 second.
4. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - Refer to Sedan With Intelligent Key.
NO - Inspection End.




Diagnosis Procedure
Regarding Wiring Diagram information, refer to Sedan With Intelligent Key.
1.CHECK DTC WITH IPDM E/R
Check "Self diagnostic result" with CONSULT-III. Refer to Testing and Inspection.
Is the inspection result normal?
YES - GO TO 2
NO - Repair or replace malfunctioning parts.
2.CHECK TRANSMISSION RANGE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM harness connector and BCM harness connector.





3. Check continuity between TCM harness connector F33 (A) terminal 20 and BCM harness connector M18 (B) terminal 48.





4. Check continuity between TCM harness connector F33 (A) terminal 20 and ground.





Is the inspection result normal?
YES - GO TO 3
NO - Repair harness or connector.
3.CHECK CVT SHIFT SELECTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect CVT shift selector (park position switch) harness connector.





3. Check voltage between CVT shift selector (park position switch) harness connector and ground.





Is the inspection result normal?
YES - GO TO 5
NO - GO TO 4
4.CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT
1. Disconnect BCM harness connector.





2. Check continuity between BCM harness connector M19 (A) terminal 84 and CVT shift selector (park position switch) harness connector M23 (B) terminal 8.





3. Check continuity between BCM harness connector M19 (A) terminal 84 and ground.





Is the inspection result normal?
YES - Replace BCM. Refer to BCM.
NO - Repair harness or connector.
5.CHECK CVT SHIFT SELECTOR CIRCUIT
1. Disconnect BCM harness connector.





2. Check continuity between BCM harness connector M19 (A) terminal 87 and CVT shift selector (park position switch) harness connector M23 (B) terminal 9.





3. Check continuity between BCM harness connector M19 (A) terminal 87 and ground.





Is the inspection result normal?
YES - GO TO 6
NO - Repair harness or connector.
6.CHECK CVT SHIFT SELECTOR
Refer to Sedan With Intelligent Key.
Is the inspection result normal?
YES - GO TO 7
NO - Replace CVT shift selector. Refer to Removal And Installation (RE0F09B) or Removal And Installation (RE0F10A).
7.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
- Inspection End.