Manual Transaxle

BM: DTC P1101 - NEUTRAL POSITION SWITCH CIRCUIT MALFUNCTION [MT VEHICLES]

DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault

TROUBLE SYMPTOM:
- Erroneous idling

CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY and INSPECTION MODES. Clearing Diagnostic Trouble Codes





WIRING DIAGRAM

10BM1: CHECK INPUT SIGNAL FOR ECM.
1) Turn ignition switch to ON.

Connector & Terminal (B135) No.26 (+) - Chassis Ground (-):

2) Measure voltage between ECM and chassis ground.

CHECK: Is the voltage more than 10 V in neutral position?

YES: Go to step 10BM2.

NO: Go to step 10BM4.

10BM2: CHECK INPUT SIGNAL FOR ECM.

Connector & Terminal (B135) No.26 (+) - Chassis Ground (-):

Measure voltage between ECM and chassis ground.

CHECK: Is the voltage less than 1 V in other positions?

YES: Go to step 10BM3.

NO: Go to step 10BM4.

10BM3: CHECK POOR CONTACT.
Check poor contact in ECM connector.

CHECK: Is there poor contact in ECM connector?

YES: Repair poor contact in ECM connector.

NO: Contact with Subaru of America (SOA) service.

NOTE:
Inspection by Subaru of America's DTM is required, because probable cause is deterioration of multiple parts.

10BM4: CHECK NEUTRAL POSITION SWITCH.
1) Turn ignition switch to OFF.

2) Disconnect connector from transmission harness.

Connector & Terminal (T2) No.1 - No.2:

3) Measure resistance between transmission harness and connector terminals.

CHECK: Is the resistance more than 1 Mohm in neutral position?

YES: Go to step 10BM5.

NO: Repair short circuit in transmission harness or replace neutral position switch.

10BM5: CHECK HARNESS BETWEEN ECM AND NEUTRAL POSITION SWITCH CONNECTOR.

Connector & Terminal (B135) No.26 - Chassis Ground:

Measure resistance between ECM and chassis ground.

CHECK: Is the resistance less than 10 Ohms?

YES: Repair ground short circuit in harness between ECM and transmission harness connector.

NO: Go to step 10BM6.

10BM6: CHECK POOR CONTACT.
Check poor contact in transmission harness connector.

CHECK: Is there poor contact in transmission harness connector?

YES: Repair poor contact in transmission harness connector.

NO: Contact with Subaru of America (SOA) service.

NOTE:
Inspection by Subaru of America's DTM is required, because probable cause is deterioration of multiple parts.