P1151
DTC P1151 - REAR 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. Clear Memory Mode
WIRING DIAGRAM
10CB1: CHECK INPUT SIGNAL FOR ECM.
Connector & Terminal (B134) No.21 (+) - Chassis Ground (-):
Measure voltage between ECM connector and chassis ground.
CHECK: Is the voltage more than 8 V?
YES: Go to step 10CB2.
NO: Go to step 10CB3.
10CB2: CHECK CURRENT DATA.
1. Turn ignition switch to OFF.
2. Repair battery short circuit in harness between ECM and rear oxygen sensor connector.
3. Turn ignition switch to ON.
4. Read data of rear 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
10CB3: 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: END