Subaru Forester 1998-05

2.5L H4 - Auto 4

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Trouble Code: P0691



Cooling Fan 1 Control Circuit Low

Possible Causes:



Check any other DTC on display
 

Trouble Code: P0692



Cooling Fan 1 Control Circuit Low

Possible Causes:



Check any other DTC on display
 

Trouble Code: P0700



Transaxle Control System (MIL Request)

Possible Causes:



Check engine start failure (does engine run)
 
Check illumination of MIL light
 
Check indication of DTC on display
 
Using the a scan tool, perform diagnosis
 

Trouble Code: P0703



Torque Converter/Brake Switch -B- Circuit

Possible Causes:



Check operation of brake light
 
Check harness between TCM and brake light switch connector
 
Check input signal for TCM
 
Check poor contact
 

Trouble Code: P0705



Transmission Range Sensor Circuit (PRNDL input)

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0710



Transmission Fluid Temperature Sensor

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0715



Torque Converter Turbine Speed Sensor Circuit Malfunction

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0716



Input/Turbine Speed Sensor Circuit Range/Performance

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0720



Output Speed Sensor Circuit

Possible Causes:



Using a scan tool, read the data
 

Trouble Code: P0725



Engine Speed Input Circuit Malfunction

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0726



Engine Speed Input Circuit Range/Performance

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0731



Gear 1 Incorrect Ratio

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 
Check front VSS circuit
 
Check torque converter turbine speed sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0732



Gear 2 Incorrect Ratio

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 
Check front VSS circuit
 
Check torque converter turbine speed sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0733



Gear 3 Incorrect Ratio

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 
Check front VSS circuit
 
Check torque converter turbine speed sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0734



Gear 4 Incorrect Ratio

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 
Check front VSS circuit
 
Check torque converter turbine speed sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0740



Torque Converter Clutch System Malfunction

Possible Causes:



Check any other DTC on display
 
Check lock up duty solenoid circuit
 
Check throttle position sensor circuit
 
Check torque converter turbine speed sensor circuit
 
Check engine speed input circuit
 
Check brake light switch circuit
 
Check ATF temperature sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0741



Torque Converter Clutch Circuit Performance or Stuck Off

Possible Causes:



Check any other DTC on display
 
Check lock up duty solenoid circuit
 
Check throttle position sensor circuit
 
Check torque converter turbine speed sensor circuit
 
Check engine speed input circuit
 
Check brake light switch circuit and/or inhibitor switch circuit
 
Check ATF temperature sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0743



Torque Converter Clutch System (lock up duty solenoid) Electrical

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0748



Pressure Control Solenoid (line pressure duty solenoid) Electrical

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0753



Shift Solenoid -A- (shift solenoid 1) Electrical

Possible Causes:



Using a scan tool, read the data
 

Trouble Code: P0758



Shift Solenoid -B- (shift solenoid 2) Electrical

Possible Causes:



Using a scan tool, read the data
 

Trouble Code: P0851



Neutral Switch Input Circuit Low (automatic transaxle)

Possible Causes:



Check any other DTC on display
 
Check input signal of ECM
 
Check harness between ECM and transmission harness connector
 
Check transmission harness connector
 
Check inhibitor switch
 
Check selector cable connection
 

Trouble Code: P0852



Neutral Switch Input Circuit High (automatic transaxle)

Possible Causes:



Check any other DTC on display
 
Check input signal of ECM
 
Check poor contact
 
Check harness between ECM and inhibitor switch connector
 
Check inhibitor switch ground
 
Check inhibitor switch
 
Check selector cable connection
 

Trouble Code: P0864



TCM Communication Circuit Range/Performance

Possible Causes:



Check driving condition (is AT shift control functioning)
 
Check accessory
 

Trouble Code: P0865



TCM Communication Circuit Low

Possible Causes:



Check harness between ECM and TCM Connector
 
Check output signal for ECM
 
Check trouble code for automatic transaxle
 

Trouble Code: P0866



TCM Communication Circuit High

Possible Causes:



Check harness between ECM and TCM Connector
 
Check poor contact
 

Trouble Code: P1086



Tumble Generated Valve Position Sensor 2 Circuit Low

Possible Causes:



Using a scan tool, check current data
 
Check input signal for ECM
 
Check harness between ECM and tumble generator valve position sensor connector
 
Check poor contact
 

Trouble Code: P1087



Tumble Generated Valve Position Sensor 2 Circuit High

Possible Causes:



Using a scan tool, check current data
 
Check harness between tumble generator valve position sensor and ECM connector
 
Check harness between throttle position sensor and ECM connector
 

Trouble Code: P1088



Tumble Generated Valve Position Sensor 1 Circuit Low

Possible Causes:



Using a scan tool, check current data
 
Check input signal for ECM
 
Check harness between ECM and tumble generator valve position sensor connector
 
Check poor contact
 

Trouble Code: P1089



Tumble Generated Valve Position Sensor 1 Circuit High

Possible Causes:



Using a scan tool, check current data
 
Check harness between tumble generator valve position sensor and ECM connector
 

Trouble Code: P1090



Tumble Generated Valve System 1 (valve open)

Possible Causes:



Check any other DTC on display
 
Check tumble generator valve (RH)
 

Trouble Code: P1091



Tumble Generated Valve System 1 (valve closed)

Possible Causes:



Check any other DTC on display
 
Check tumble generator valve (RH)
 

Trouble Code: P1092



Tumble Generated Valve System 2 (valve open)

Possible Causes:



Check any other DTC on display
 
Check tumble generator valve (RH)
 

Trouble Code: P1093



Tumble Generated Valve System 2 (valve closed)

Possible Causes:



Check any other DTC on display
 
Check tumble generator valve (RH)
 

Trouble Code: P1094



Tumble Generated Valve Signal 1 Circuit Malfunction

Possible Causes:



Check harness between ECM and tumble generator valve actuator connector
 
Check poor contact
 

Trouble Code: P1095



Tumble Generated Valve Signal 1 Circuit Malfunction (short)

Possible Causes:



Check harness between ECM and tumble generator valve actuator connector
 

Trouble Code: P1096



Tumble Generated Valve Signal 2 Circuit Malfunction (open)

Possible Causes:



Check harness between ECM and tumble generator valve actuator connector
 
Check poor contact
 

Trouble Code: P1097



Tumble Generated Valve Signal 2 Circuit Malfunction (short)

Possible Causes:



Check harness between ECM and tumble generator valve actuator connector
 

Trouble Code: P1100



Starter Switch Circuit Malfunction

Possible Causes:



Check starter motor
 

Trouble Code: P1101



Neutral Position Switch Circuit Malfunction

Possible Causes:



Check input signal for ECM
 
Check harness between ECM and transmission harness connector
 
Check inhibitor switch
 

 
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