- Turn ignition off. Disconnect ECM harness connector. Check resistance between ECM harness connector terminal No. 3 and chassis ground. If resistance is 700 k/ohms or greater, go to next step. If resistance is less than 400 k/ohms, go to step 3).
- Disconnect KS harness connector. Check resistance between KS harness connector terminal No. 1 and chassis ground. See appropriate wiring diagram in «WIRING DIAGRAMS»(ref-26255) article. If resistance is less than 700 k/ohms, check and repair open in harness between ECM and KS connector, poor contact of KS connector or poor contact in coupling between KS and ECM. If resistance is 700 k/ohms or greater, ensure KS installation bolt is secure. If installation bolt is loose, tighten securely. If installation bolt is secure, replace KS.
- Disconnect ECM harness connector. Check resistance between ECM harness connector terminal No. 3 and chassis ground. If resistance is 400 k/ohms or less, go to next step. If resistance is greater than 400 k/ohms, go to step 5).
- Disconnect KS harness connector. Check resistance between KS terminal No. 1 and chassis ground. If resistance is 400 k/ohms or less, replace sensor. If resistance is greater than 400 k/ohms, check for short to ground in harness between KS and ECM connector.
- Reconnect ECM and KS harness connectors. Turn ignition on. Using DVOM connected to chassis ground, backprobe ECM harness terminal No. 3. If voltage reading is less than 2 volts, repair poor contact in ECM connector. If voltage reading is 2 volts or greater, circuit has returned to normal. Check for poor contact at KS connector, ECM connector and coupling connector between KS and ECM.
Home/Subaru/Outback/Subaru Outback BG (1994-1999)/Repair manual/Testing & Diagnostics/DTC P0325 (KNOCK) - KNOCK SENSOR (KS) CIRCUIT MALFUNCTION
Contents
Wiring diagrams Section: Testing & Diagnostics- Engine Controls - Tests W/codes: Diagnosis
- Engine Controls - Tests W/codes: Component Locations
- Engine Controls - Tests W/codes: Other
- DTC P0100 (QA) - MASS AIRFLOW (MAF) SENSOR CIRCUIT MALFUNCTION
- DTC P0105 (P_S) - PRESSURE SENSOR CIRCUIT MALFUNCTION
- DTC P0106 (P_R) - PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM
- DTC P0115 (TW) - ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT MALFUNCTION
- DTC P0120 (THV) - THROTTLE POSITION (TP) SENSOR CIRCUIT MALFUNCTIONCIRCUIT MALFUNCTION
- DTC P0121 (TH_R) - THROTTLE POSITION (TP) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM
- DTC P0125 (TW_CL) - INSUFFICIENT ENGINE COOLANT TEMP. FOR CLOSED LOOP FUEL CONTROL
- DTC P0130 (FO2_V) - FRONT O2S CIRCUIT MALFUNCTION
- DTC P0133 (FO2_R) - FRONT O2S CIRCUIT SLOW RESPONSE
- DTC P0135 (FO2H) - FRONT O2S HEATER CIRCUIT MALFUNCTION
- DTC P0136 (RO2_V) - REAR O2S CIRCUIT MALFUNCTION
- DTC P0139 (RO2_R) - REAR O2S CIRCUIT SLOW RESPONSE
- DTC P0141 (RO2_H) - REAR O2S HEATER CIRCUIT MALFUNCTION
- DTC P0170 (FUEL) - FUEL TRIM MALFUNCTION
- DTC P1080 - FUEL TEMPERATURE SENSOR A CIRCUIT MALFUNCTION (TNKT)
- DTC P0201 (INJ1), P0202 (INJ2), P0203 (INJ3), P0204 (INJ4) FUEL INJECTOR CIRCUIT MALFUNCTION
- DTC P0301 (MIS_1), P0302 (MIS_2), P0303 (MIS_3), P0304 (MIS_4) - CYLINDER (1, 2, 3 OR 4) MISFIRE DETECTED
- DTC P0325 (KNOCK) - KNOCK SENSOR (KS) CIRCUIT MALFUNCTION
- DTC P0335 (CRANK) - CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT MALFUNCTION
- DTC P0340 (CAM) - CAMSHAFT POSITION (CMP) SENSOR CIRCUIT MALFUNCTION
- DTC P0400 (EGR) - EGR FLOW MALFUNCTION
- DTC P0403 (ERGSOL) EGR CIRCUIT MALFUNCTION
- DTC P0420 (CAT) - CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD
- DTC P0440 (EVAP) - EVAP EMISSION CONTROL SYSTEM
- DTC P0441 (CPC_F) - EVAP EMISSION CONTROL SYSTEM INCORRECT PURGE FLOW
- DTC P0443 (CPC) - EVAP EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT MALFUNCTION
- DTC P0500 (VSP) - VEHICLE SPEED SENSOR (VSS) MALFUNCTION
- DTC P0505 (ISC) - IDLE CONTROL SYSTEM MALFUNCTION
- DTC P0506 (ISC_L) - IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED
- DTC P0507 (ISC_H) - IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED
- DTC P0600 - SERIAL COMMUNICATION LINK MALFUNCTION
- DTC P0601 (RAM) - INTERNAL CONTROL MODULE MEMORY CHECK SUM ERROR
- DTC P1100 (ST_SW) - STARTER SWITCH CIRCUIT MALFUNCTION
- DTC P1101 (N/P_SW) - NEUTRAL POSITION SWITCH CIRCUIT MALFUNCTION (A/T)
- DTC P1101 (N/P_SW) - NEUTRAL POSITION SWITCH CIRCUIT MALFUNCTION (M/T)
- DTC P1502 (FAN_F) - COOLING FAN FUNCTION PROBLEM
- DTC P1700 (ATTH) - TP SENSOR CIRCUIT MALFUNCTION (A/T)
- Engine Controls - System/component Tests: Overview
- Engine Controls - System/component Tests: Diagnosis
- Engine Controls - System/component Tests: Other
- Abbreviations
- Adjustments
- Airbag
- Anti-Lock/traction Control
- Application
- Automatic Trans
- Axle Shafts
- Basic Trouble Shooting
- Brakes
- Charging System
- Check Lists
- Clutches Manual & Hydraulic
- Computer Relearn
- Cooling Fan
- Cooling System (Mechanical)
- Cruise Control Systems
- Diagnostic Connector Locations
- Differentials & Drive Axles
- Door Locks & Anti-Theft Systems
- Driveline/axles
- Electrical Component Locations
- Emission Applications
- Engine
- Engine Performance
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Heated Glass/defoggers
- Heater
- Identification
- Manual & Power Steering
- Manual HVAC System
- Manual Trans
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Mode 6
- Pin Voltage Charts
- Procedures
- Removal & Installation
- Restraints
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Timing Belt
- Traction Control Disable
- Transmission
- Wheel Alignment
- Windows
- Wiper/washer Systems
- Wiring Diagrams - Engine Performance