P1150
CB: DTC P1150 - FRONT OXYGEN SENSOR HEATER CIRCUIT HIGH INPUTDTC DETECTING CONDITION:
- Two consecutive driving cycles with fault
CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE and INSPECTION MODE. Refer to How to Clear Diagnostic Trouble Codes. Clearing Diagnostic Trouble Codes
WIRING DIAGRAM
10CB1: CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM connector and chassis ground.
Connector & Terminal (B134) No.23 (+) - Chassis Ground (-):
CHECK: Is the voltage more than 8 V?
YES: Go to step 10CB3.
NO: Go to step 10CB2.
1OCB2 CHECK OUTPUT SIGNAL FROM ECM.
Measure voltage between ECM connector and chassis ground.
Connector & Terminal (B134) No.22 (+) - Chassis Ground (-):
CHECK: Is the voltage more than 8 V?
YES: Go to step 10CB3.
NO Go to step 10CB4.
10CB3: CHECK FRONT OXYGEN SENSOR HEATER CURRENT.
1) Turn ignition switch to OFF.
2) Repair battery short circuit in harness between ECM and front oxygen sensor connector.
3) Connect Subaru Select Monitor or the OBD-II general scan tool to data link connector.
4) Turn ignition switch to ON and Subaru Select Monitor or OBD-II general scan tool switch to ON.
5) Read data of front oxygen sensor heater current using Subaru Select Monitor or the OBD-II general scan tool.
NOTE:
- Subaru Select Monitor
For detailed operation procedure, Refer to the "READ CURRENT DATA SHOWN ON DISPLAY FOR ENGINE". Refer to Normal Scan Data values.
- OBD-II general scan tool
For detailed operation procedure, Refer to the OBD-II General Scan Tool Instruction Manual.
CHECK: Is the value more than 7 A?
YES: Replace ECM.
NO: END
10CB4: CHECK OUTPUT SIGNAL FROM ECM.
Measure voltage between ECM connector and chassis ground.
Connector & Terminal (134) No.23 (+) - Chassis Ground (-):
CHECK: Does the voltage change more than 8 V by shaking harness and connector of ECM while monitoring the value with voltage meter?
YES: Repair battery short circuit in harness between ECM and front oxygen sensor connector.
NO: Go to step 1OCB5.
10CB5: CHECK OUTPUT SIGNAL FROM ECM.
Measure voltage between ECM connector and chassis ground.
Connector & Terminal (B134) No.22 - Chassis Ground (-):
CHECK: Does the voltage change more than 8 V by shaking harness and connector of ECM while monitoring the value with voltage meter?
YES: Repair battery short circuit in harness between ECM and front oxygen sensor connector.
NO: END