A/T
DTC P1722 - Automatic Transmission Diagnosis Input Signal Circuit High InputDTC DETECTING CONDITION:
- Two consecutive driving cycles with fault
CAUTION: After repair or replacement of faulty conduct CLEAR MEMORY MODE AND INSPECTION MODE.
Wiring Diagram:
WIRING DIAGRAM
11DF1: CHECK HARNESS BETWEEN ECM AND TCM CONNECTOR.
1. Turn ignition switch to ON.
Connector & Terminal - [(B135) No.4 (+) - Chassis Ground (-)]:
2. Measure voltage between ECM and chassis ground.
CHECK: Is the voltage more than 10 V?
YES: Repair battery short circuit in harness between ECM and TCM connector. After repair, replace ECM.
NO: Go to step 11DF2.
11DF2: CHECK HARNESS BETWEEN ECM AND TCM CONNECTOR.
Connector & Terminal - [(B135) No.4 (+) - Chassis Ground (-)]:
Measure voltage between ECM connector and chassis ground.
CHECK: Is the voltage more than 4 V?
YES: Go to step 11DF5.
NO: Go to step 11DF3.
11DF3: CHECK HARNESS BETWEEN ECM AND TCM CONNECTOR.
Connector & Terminal - [(B135) No.4 (+) - Chassis Ground (-)]:
Measure voltage between ECM connector and chassis ground.
CHECK: Is the voltage less than 1 V?
YES: Repair poor contact in ECM connector.
NO: Go to step 11DF4.
11DF4: CHECK OUTPUT SIGNAL FROM ECM.
Connector & Terminal - [(B135) No.4 (+) - Chassis Ground (-)]:
Measure voltage between ECM and chassis ground.
CHECK: Does the voltage change from 1 V to 4 V while monitoring the value with voltage meter?
YES: Even if MIL lights up, the circuit has returned to a normal condition at this time.
NOTE: In this case, repair the following:
- Poor contact in ECM connector
- Poor contact in TCM 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.
11DF5: CHECK HARNESS BETWEEN ECM AND TCM CONNECTOR.
Connector & Terminal - [(B135) No.4 (+) - Chassis Ground (-)]:
Measure voltage between TCM and chassis ground.
CHECK: Is the voltage more than 4 V?
YES: Go to step 11DF6.
NO: Repair open circuit in harness between ECM and TCM connector.
11DF6: CHECK POOR CONTACT.
Check poor contact in TCM connector.
CHECK: Is there poor contact in TCM connector?
YES: Repair poor contact in TCM connector.
NO: Check TCM power supply line and grounding line.