B2126

B2126 DETENT SW





Description
- Park position switch is installed on A/T shift selector. It is turned OFF when the A/T selector lever is in P position.
- The driver seat control unit judges that the A/T selector lever is in P position if continuity does not exist in this circuit.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1. STEP 1
Drive the vehicle at 7�4km/h or more.
- GO TO 2
2. STEP 2
Check "Self diagnostic result" with CONSULT-III.
Is the DTC detected?
YES - Perform diagnosis procedure.
NO - Inspection End.




Diagnosis Procedure
Regarding Wiring Diagram information, Driver Seat Control Unit.
1. CHECK DTC
Check "Self diagnostic result" for BCM with CONSULT-III.
Are other DTCs detected?
YES - Check the DTC.
NO - GO TO 2
2. CHECK DETENTION SWITCH SIGNAL
1. Turn ignition switch ON.
2. Select "DETENT SW" in "Data Monitor" mode with CONSULT-III.
3. Check detention switch signal under the following condition.





Is the status normal?
YES - A/T shift selector (park position switch) circuit is OK.
NO - GO TO 3
3. CHECK A/T SHIFT SELECTOR (PARK POSITION SWITCH) HARNESS





1. Turn ignition switch OFF.
2. Disconnect A/T shift selector and driver seat control unit.
3. Check continuity between driver seat control unit connector
B202 (A) terminal 21 and A/T shift selector connector M203 (B) terminal 6.

6 - 21 : Continuity should exist.

4. Check continuity between driver seat control unit connector
B202 (A) terminal 21 and ground.

21 - Ground : Continuity should not exist.

Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace harness.
4. CHECK PARK POSITION SWITCH





Check continuity between A/T shift selector (park position switch) terminals as follows.





Is the inspection result normal?
YES - GO TO 5
NO - Replace A/T shift selector. Service and Repair.
5. CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - Replace driver seat control unit. Driver Seat Control Unit.
NO - Repair or replace the malfunctioning part.