Subaru Trouble Code Info
Subaru Trouble Code Info
Retrieving Trouble Codes
96 & later are OBD2 systems
There are self-diagnositic connectors on all models, when connected with the key ON (engine off), flash trouble codes on the LED light of the oxygen moniter of the ECU.
Images used with permission Copyright 2001 ALLDATA LLC.
* The connectors are under the steering wheel, to the left of the module on most models.
* On carberated and SPFI injected 89 models,the test connectors are located on the engine side/driver's side of the firewall.
* Imprenza models have the ECU and test connectors located behind the right side of the dash, instead of the left.
* On SVX models the connectors are located behind the driver's side kick panel.
Test Modes
o With neither test connector connected and the key ON(not running), the codes will display codes related to starting and driving.
o With only the "Read Memory" connector connected, historic codes will be displayed.
o With only the "Test Mode" connector connected, a technician can perform dynamic tests.
o The last mode is for clearing codes.(See Clearing Codes)
Reading Trouble Codes
The codes are displayed as pulses of the LED mounted on the module. Long pulses (1.2 seconds) indicate tens and the short pulses (.2 seconds) indicate ones. Pulses are seperated by .3 second puses and codes are seperated by 1.8 second pauses. NOTE:on 89 MPFI models, the Oxygen Moniter light and ECU are mounted under the rear package shelf and are only accessible from the trunk.
On some later models the Check engine lamp and O2 monitor lamp flash the code(s) corresponding to the faulty part. The long segment (1.2 sec on) indicates a "ten", and the short segment (0.2 sec on) signifies a "one".
* 90 models - Trouble codes on the Justy are viewed on the Oxygen Moniter light, all other models the codes can be viewed on either the Oxygen Moniter light or the MIL (check engine light).
* 95 Imprenza and Legacy models have OBD2 systems and require a scanner,but some basic codes can be retreived using the flashing MIL method.
Clearing Codes
Codes will only clear when the faulty system or circuit has been repaired. After making the repairs, codes can be cleared by connecting 2 pairs of connectors, the "Self-diagnostic" connectors and the "Read Memory" connectors that are usually to the right of the diagnostic connectors.
* Start with a warmed up engine
* Turn off the engine
* Connect both pairs of connectors
* Fianlly start the engine
* This should clear the codes.
Trouble Codes
83 - 88 Subaru carb models
11 Ignition pulse system/crank angle sensor(87 & later)
12 Ignition pulse system (1983 only)/Starter switch (84 & later)
13 Crank angle sensor or circuit
14 Vacuum switches stay on or off (1983 only)/Duty solenoid or circuit(1983 to 1985)/Injectors 1 & 2 (87-up)
15 Solenoid valve stays on or off (1983 only)/Coasting Fuel Cut (CFC) system (1983 to 1985 )
16 Feedback system (1983 to 1985 models)
17 Fuel pump and automatic choke (1983 to 1985 carbureted)
21 Ignition pulse system (1983 only)/coolant temperature sensor or circuit (1983 to 1985 carbureted)
22 Ignition pulse system (1983 only)/Vehicle speed sensor or circuit or VLC solenoid valve or circuit. (1984 to 1988 carbureted)
23 Oxygen sensor or circuit (1983 to 1988)/pressure sensor or circuit (1983 to 1985)
24 Vacuum switches stay on or off (1983 only)/coolant temperature sensor or circuit, or Idle-up solenoid or circuit (1984 to 1988 carbureted)
25 Manifold vacuum sensor or circuit/coolant temperature sensor or circuit on 1984 models)/float chamber vent solenoid valve or circuit (1983 to 1985)
32 Coolant temperature sensor or circuit (1983)/Oxygen sensor or circuit (1984 to 1988)
33 Main system in feedback (1983 to 1988)/Vehicle speed sensor or circuit (1983 to 1985)
34 Choke power stays on or off (1983)/EGR system solenoid or circuit (1883 to 1988)
35 Canister purge solenoid or circuit (1983 to 1985)
41 Vacuum switches stay on or off (1983 only)/Feedback system (California models 1983 to 1985)
42 Vacuum switches stay on or off (1983 only)/clutch switch or circuit (1983 to 1988)
43 Choke power stays on or off (1983)
46 Radiator fan control (1983 to 1985)
52 Solenoid valve control system or clutch switch
53 Fuel pump circuit or Altitude compensator switch
54 Choke control system
55 Upshift control or EGR sensor
56 EGR system
62 Exhaust Gas Recirculation (EGR) solenoid valve control or Idle-up system
63 Canister solenoid valve or circuit/Idle-up system
64 Vacuum line control valve or circuit
65 Float chamber vent control valve circuit
71 Ignition pulse system
73 Ignition pulse system
74 Ignition pulse system
84 - 86 Fuel Injected models
11 Ignition pulse
12 Starter switch off
13 Starter switch on
14 Airflow meter or circuit
15 Atmospheric pressure switch - fixed value
16 Crank angle sensor or circuit
17 Starter switch or circuit
21 Seized airflow meter flap
22 Pressure or vacuum switches - fixed value
23 Idle switch - fixed value
24 Wide open throttle switch - fixed value
25 Throttle sensor idle switch or circuit
31 Speed sensor or circuit
32 Oxygen sensor or circuit
33 Coolant sensor or circuit
34 Abnormal aspirated air thermosensor
35 Air flow meter/EGR solenoid switch or circuit
41 Atmospheric pressure sensor or circuit
42 Fuel injector - fixed value
43 KDLH control system
46 Neutral or parking switch or circuit
47 Fuel injector
53 Fuel pump or circuit
55 KDLH control system
57 Canister control system
58 Air control system
62 EGR control system
88 TBI control unit
87 Fuel Injected models
11 Ignition pulse/crank angle sensor
12 Starter switch or circuit
13 Crank angle sensor or circuit
14 Injectors 1 and 2
15 Injectors 3 and 4
21 Coolant temperature sensor or circuit
22 Knock sensor or circuit
23 Air flow meter or circuit
24 Air control
31 Throttle sensor or circuit
32 Oxygen sensor or circuit
33 Vehicle Speed Sensor (VSS) or circuit
34 EGR solenoid valve stuck on or off
35 Purge control solenoid or circuit
41 Lean fuel mixture indicated
42 Idle switch or circuit
45 Kick-down relay or circuit
51 Neutral switch or curcuit
61 Parking switch or circuit
88 and later models with Single-Point Fuel Injection
11 Crank angle sensor or circuit
12 Starter switch or circuit
13 Crank angle sensor or circuit
14 Fuel injector - abnormal output
21 Coolant temperature or circuit
23 Air flow meter or circuit
24 Air control valve or circuit
31 Throttle sensor or circuit
32 Oxygen sensor or circuit
33 Vehicle Speed Sensor or circuit
34 EGR solenoid or circuit
35 Purge control solenoid or circuit
42 Idle switch or circuit
45 Kick-down control relay or circuit
51 Neutral switch continuously in the on position
55 EGR temperature sensor or circuit
61 Parking switch or circuit
1988 and later models with Multi-Point Fuel Injection (including Legacy)
11 Crank angle sensor or circuit
12 Starter switch or circuit
13 Cam position sensor or circuit (TDC sensor on Justy)
14 Fuel injector no. 1 (Legacy, Impreza, Justy, SVX); Fuel injector 1 and 2 (XT, Loyale, GL, DL)
15 Fuel injector no. 2 (Legacy, Impreza, Justy, SVX); Fuel injector 3 and 4 (Loyale, GL, DL); Fuel injector 5 and 6 (XT6)
16 Fuel injector no. 3 (Legacy, Impreza, Justy, SVX); Fuel injector 3 and 4 (XT)
17 Fuel injector no. 4 (Legacy, Impreza, SVX); Fuel injector 1 and 2 (XT6)
18 Fuel injector no. 5 (SVX)
19 Fuel injector no. 6 (SVX)
21 Coolant temperature sensor or circuit
22 Knock sensor or circuit (right side on SVX)
23 Air flow meter or circuit (exc. Justy); Pressure sensor (Justy)
24 Air control valve or circuit (exc. Justy); Idle speed control solenoid valve (Justy)
25 Fuel Injector 3 and 4 (XT6)
26 Air temperature sensor (Justy)
28 Knock sensor no. 2 (SVX, left side)
29 Crank angle sensor (SVX, no. 2)
31 Throttle position sensor or circuit
32 Oxygen sensor or circuit (no. 1, right side on SVX)
33 Vehicle speed sensor (VSS) or circuit
34 EGR solenoid valve
35 Canister purge solenoid or circuit
36 Air suction solenoid valve (Impreza); Igniter circuit (Justy)
37 Oxygen sensor (no. 2, left side , SVX)
38 Engine torque control (SVX)
41 Air/fuel adaptive control
42 Idle switch or circuit
43 Throttle switch (Justy)
44 Wastegate duty solenoid (turbo)
45 Pressure duty solenoid (turbo)/atmospheric pressure sensor circuit (non-turbo)
49 Airflow sensor
51 Neutral switch (manual transmission)/inhibitor switch (automatic transmission)
52 Parking brake switch (exc. Justy)/Clutch switch (Justy)
55 EGR temperature sensor
56 EGR system
61 Parking brake switch (Loyale)/Fuel tank pressure control solenoid valve (Impreza)
62 Fuel temperature sensor (Impreza)/Electric load signal (Justy)
63 Fuel tank pressure sensor (Impreza)/Blower fan switch (Justy)
65 Vacuum pressure sensor
http://www.troublecodes.net
