V4 obd compliant?
- Thread starter A96wagon
- Start date
Manually Reading ECU Codes (Classic Impreza’s only)
On Classic shape Impreza’s only (not Newage) faults can be displayed as pulses of the Check Engine Light. If the Check Engine Light goes out there is no fault.
In order to perform diagnostic (and ECU resets) you will need to connect some wires together under your steering column. Note, the following procedure only works for Classic shape Impreza’s, not for Newage.
Figure 1 - Black and Green Connectors on Classic ImprezaWhen the above are connected you are in diagnostics mode. Turn your ignition ON and ‘read’ the ECU code(s) being reported according to the following instructions. Note, you may here relays clicking and your fan starting and stopping - this is normal when in diagnostics mode.
In Diagnostic Mode – No Fault is indicated by the Check Engine Light continuously & evenly flashing on/off (this is also used to indicate the successful completion of an ECU Reset).
Figure 2 - Check Engine Light Pulse WidthThe long pulses (1.3 Seconds) indicate Tens and the short pulses (0.2 Seconds) indicate ones. Pulses are separated by Short Pauses (0.2 Seconds), multiple codes are separated by a Long Pause (1.8 Seconds).
The simplest way for an inexperienced mechanic to retrieve codes is to write the codes down in a sort of Morse Code (dots and dashes), and start a new line when you get a 1.8 Second pause (for NEW code), and then add the actual numbers up after code retrieval is completed.
(See Example Below)
--- CODE EXAMPLE, SINGLE CODE ---
1.3 second pulse (10)
0.2 second pause
1.3 second pulse (10….for a total of 20)
0.2 second pause
0.2 second pulse (1…..for a total of 21)
0.2 second pause
0.2 second pulse (1…..for a total of 22)
0.2 second pause
0.2 second pulse (1…..for a total of 23)
(Code 23 — MAF Sensor)
--- CODE EXAMPLE, MULTIPLE CODE ---
1.3 second pulse (10)
0.2 second pause
1.3 second pulse (10….for a total of 20)
0.2 second pause
0.2 second pulse (1…..for a total of 21)
0.2 second pause
0.2 second pulse (1…..for a total of 22)
0.2 second pause
0.2 second pulse (1…..for a total of 23)
1.8 second pause (this means NEW code)
1.3 second pulse (10)
0.2 second pause
0.2 second pulse (1…..for a total of 11)
0.2 second pause
.2 second pulse (1…..for a total of 12)
(Codes 23 and 12, MAF Sensor and Starter Circuit)
On Classic shape Impreza’s only (not Newage) faults can be displayed as pulses of the Check Engine Light. If the Check Engine Light goes out there is no fault.
In order to perform diagnostic (and ECU resets) you will need to connect some wires together under your steering column. Note, the following procedure only works for Classic shape Impreza’s, not for Newage.
- Make sure your ignition is OFF
- Connect the Black ‘Read Memory’ connectors together as illustrated below.
Figure 1 - Black and Green Connectors on Classic Impreza
In Diagnostic Mode – No Fault is indicated by the Check Engine Light continuously & evenly flashing on/off (this is also used to indicate the successful completion of an ECU Reset).
Figure 2 - Check Engine Light Pulse Width
The simplest way for an inexperienced mechanic to retrieve codes is to write the codes down in a sort of Morse Code (dots and dashes), and start a new line when you get a 1.8 Second pause (for NEW code), and then add the actual numbers up after code retrieval is completed.
(See Example Below)
--- CODE EXAMPLE, SINGLE CODE ---
1.3 second pulse (10)
0.2 second pause
1.3 second pulse (10….for a total of 20)
0.2 second pause
0.2 second pulse (1…..for a total of 21)
0.2 second pause
0.2 second pulse (1…..for a total of 22)
0.2 second pause
0.2 second pulse (1…..for a total of 23)
(Code 23 — MAF Sensor)
--- CODE EXAMPLE, MULTIPLE CODE ---
1.3 second pulse (10)
0.2 second pause
1.3 second pulse (10….for a total of 20)
0.2 second pause
0.2 second pulse (1…..for a total of 21)
0.2 second pause
0.2 second pulse (1…..for a total of 22)
0.2 second pause
0.2 second pulse (1…..for a total of 23)
1.8 second pause (this means NEW code)
1.3 second pulse (10)
0.2 second pause
0.2 second pulse (1…..for a total of 11)
0.2 second pause
.2 second pulse (1…..for a total of 12)
(Codes 23 and 12, MAF Sensor and Starter Circuit)
| subaru code | subaru trouble code description |
|---|---|
| 1 | Engine Speed Signal Circuit |
| 11 | Crankshaft Position Sensor |
| 12 | Starter Signal |
| 13 | Camshaft Position Sensor |
| 14 | Fuel Injector No. 1 (Legacy, Impreza, Justy, SVX) |
| 15 | Fuel Injector No. 2 (Legacy, Impreza, Justy, SVX) |
| 16 | Fuel Injector No. 3 (Legacy, Impreza, Justy, SVX) |
| 17 | Fuel Injector No. 4 (Legacy, Impreza, SVX) |
| 18 | Fuel Injector No. 5 (SVX) |
| 19 | Fuel Injector No. 6 (SVX) |
| 21 | Engine Coolant Temperature Sensor |
| 22 | Knock Sensor |
| 23 | Mass Air Flow Sensor Circuit |
| 24 | Idle Control System Malfunction |
| 24 | ISC Valve (Stick) |
| 24 | Open/Short in ISC Valve Circuit |
| 26 | Intake Air Temperature Sensor |
| 27 | ATF Temperature Sensor Circuit |
| 28 | Knock Sensor #2 |
| 29 | Crankshaft Position Sensor 2 |
| 31 | Throttle Position Sensor Circuit |
| 32 | A/F Sensor #1 System |
| 32 | A/F Sensor #2 System |
| 32 | Oxygen Sensor |
| 33 | Vehicle Speed Sensor |
| 35 | CPC System |
| 36 | Turbine Speed Signal |
| 37 | Rear O2 Sensor Circuit / A/F Sensor Circuit Malfunction |
| 38 | Torque Control Signal #1 |
| 38 | Torque Control Signal #2 |
| 38 | Torque Control Signal System |
| 38 | Torque Permission Signal |
| 39 | Traction Control System |
| 41 | Air/Fuel Adaptive Control |
| 42 | Idle Switch |
| 43 | Accelerator Pedal Switch |
| 44 | Turbocharging Pressure Control Signal |
| 45 | Pressure Sensor |
| 46 | Neutral or Parking Switch or Circuit |
| 47 | Fuel Injector |
| 48 | Lean Burn System |
| 49 | CO Resistor |
| 51 | Neutral Position Switch |
| 52 | Parking Brake Switch (Exc. Justy) |
| 53 | Antenna |
| 53 | Anti-Quick Operation Mode |
| 53 | Communication Error (Time Over) |
| 53 | EGI Control Module EEPROM |
| 53 | IMM Circuit Failure (Except Antenna Circuit) |
| 53 | IMM Control Module EEPROM |
| 53 | Key Communication Failure |
| 53 | Reference Code Incompatibility |
| 53 | Use of Unregistered Key |
| 54 | Air Intake System |
| 55 | EGR Valve Lift Sensor |
| 56 | EGR System |
| 57 | Canister Control System |
| 58 | Air Control System |
| 61 | Air Suction Control Solenoid Valve |
| 62 | Exhaust Manifold Valve Negative Pressure Control Solenoid |
| 64 | Relief Valve Control Solenoid Valve 1 |
| 64 | Relief Valve Control Solenoid Valve 2 |
| 65 | Differential Pressure Sensor |
| 66 | Twin Turbocharger System(H) |
| 66 | Twin Turbocharger System(S) |
| 66 | Twin Turbocharger System(T) |
| 66 | Two Stage Twin Turbocharger System |
| 67 | Exhaust Manifold Valve Positive Pressure Control Solenoid |
| 68 | Turbocharging Pressure Control Output Signal #2 |
| 71 | Shift Solenoid Valve |
| 72 | Shift Solenoid #2 Circuit |
| 73 | Low Clutch Timing Solenoid Circuit |
| 74 | Brake Clutch Timing Solenoid Circuit Malfunction |
| 75 | Line Pressure Duty Solenoid Circuit |
| 76 | Brake Clutch Pressure Duty Solenoid Circuit Malfunction |
| 77 | Lock-Up Duty Solenoid Circuit |
| 78 | Tiptronic Solenoid System |
| 79 | Transfer Clutch Duty Solenoid Circuit |
| 81 | Torque Up Control Valve |
| 85 | Charger System Circuit Malfunction |
| 86 | CAN (Communication System) |
| 87 | Variable Induction Solenoid Valve Circuit Malfunction |
| 88 | Fuel Pump Circuit Malfunction |
| 89 | VVT Systems (L) |
| 89 | VVT Systems ® |
| 91 | TCS Relief Valve |
| 92 | Electrical Generation Control Signal Circuit Malfunction |
| 93 | Vehicle Speed Sensor #1 Circuit |
| 94 | Lateral G Sensor Signal Circuit Malfunction |
[h=1]ECU Reset[/h]You may want to reset your ECU because you want to clear a fault code or simply to let you ECU re-learn your settings again, say after a modification or change in fuel (octane).
[h=2]Classic (JECS) ECU Reset[/h]
Black and Green Connectors on Classic
[h=2]Classic (JECS) ECU Reset[/h]
- Ensure engine is at normal operating temperature, turn engine off
- Locate the two ECU connectors, located under the steering column and consist of a black plastic male and female connector, and a green male female connector
- With the ignition OFF connect black to black and green to green.
- Turn on ignition, do not start the engine, depress the accelerator pedal to full throttle, then return it to the half-throttle position and hold for a few seconds, and then release
- Engine Check lamp turns on
- Start engine and then drive for at least one minute, keeping road speed above 11 Km/h.
- ECU is now re-set.
- At this point the check engine light should start to flash the all clear signal (steady 1/2 second interval flashes). If the check engine light does not flash, or indicates some other sequence, there is a fault present in the system, and should be professionally checked for necessary repairs.
- Stop the car and turn off the engine.
- Disconnect the black and green connectors.
- Job complete
Black and Green Connectors on Classic
That should get you sorted 
ah maybe I had that wrong I was told it was V4 if the coil was in the middle
joys of scooby newbiesthanks man that's exactly the reply I was hoping to getThat should get you sorted
davelegacy
Member Number 16
Be late 96 v3 by sounds
davelegacy
Member Number 16
All years area October.
davelegacy
Member Number 16
Bug-blob was nov02