| 2002 WRX Engine Control Module (ECM) I/O Signals | ||||||||
|---|---|---|---|---|---|---|---|---|
| Content | Con- nector No. |
Ter- minal No. |
Wire Color (*) |
Signal (V) | Note | |||
| Ignition SW ON (Engine OFF) |
Engine ON (Idling) | |||||||
| Crankshaft position sensor |
Signal (+) | B135 | 2 | W |  |
0 | -7 to +7 | Sensor output waveform |
| Signal (-) | B135 | 11 | G |  |
0 | 0 | - | |
| Shield | B135 | 21 | SB |  |
0 | 0 | - | |
| Camshaft position sensor |
Signal (+) | B135 | 1 | R |  |
0 | -7 to +7 | Sensor output waveform |
| Signal (-) | B135 | 10 | B |  |
0 | 0 | - | |
| Shield | B135 | 21 | SB | |
0 | 0 | - | |
| Throttle position sensor |
Signal | B135 | 7 | Lg |  |
Fully closed: 0.2 to
1.0 Fully opened: 4.2 to 4.7 |
- | |
| Power supply |
B135 | 9 | Sb | |
5 | 5 | - | |
| Ground (sensor) |
B135 | 19 | RG |  |
0 | 0 | - | |
| Rear oxygen sensor |
Signal | B135 | 17 | W | |
0 | 0 to 0.9 | - |
| Shield | B135 | 26 | SB | |
0 | 0 | - | |
| Ground (sensor) |
B135 | 19 | RG | |
0 | 0 | - | |
| Heater | B136 | 13 | RW |  |
0 to 1.0 | 0 to 1.0 | - | |
| Front oxygen (A/F) sensor |
Sensor (+) | B137 | 19 | W | |
2.8 to 3.2 | 2.8 to 3.2 | - |
| Sensor (-) | B137 | 29 | B | |
2.4 to 2.7 | 2.4 to 2.7 | - | |
| Shield | B136 | 7 | SB | |
0 | 0 | - | |
| Heater 1 | B137 | 4 | W | |
0 to 1.0 | 0 to 1.0 | - | |
| Heater 2 | B137 | 5 | W | |
0 to 1.0 | 0 to 1.0 | - | |
| Engine Coolant temp. sensor |
Signal | B135 | 18 | BY |  |
1.0 to 1.4 | 1.0 to 1.4 | After engine warmup |
| Ground (sensor) |
B135 | 19 | RG | |
0 | 0 | - | |
| Vehicle speed signal | B134 | 1 | GY |  |
0 or 5 | 0 or 5 | Four 5V pulses for every front differential revolution. 2,548 pulses per minute is 60 km/h. |
|
| Mass air flow (MAF) sensor |
Signal | B84 | 13 | PL |  |
- | 0.3 to 4.5 | - |
| Shield | B84 | 8 | SB | |
0 | 0 | - | |
| Ground | B84 | 7 | BG |  |
0 | 0 | - | |
| Intake air temperature sensor signal |
B135 | 27 | Br |  |
- | - | - | |
| Exhaust gas tem- perature sensor |
Signal | B135 | 16 | WB |  |
- | - | - |
| Ground (sensor) |
B135 | 19 | RG | |
0 | 0 | - | |
| Tumble generator valve position sensor RH |
Signal | B84 (B135?) |
23 | BrR |  |
Fully closed: 0.2 to
1.0 Fully opened: 4.2 to 4.7 |
- | |
| Power supply |
B135 | 9 | Sb | |
5 | 5 | - | |
| Ground (sensor) |
B135 | 19 | RG | |
0 | 0 | - | |
| Tumble generator valve position sensor LH |
Signal | B84 (B135?) |
13 | BrY |  |
Fully closed: 0.2 to 1.0 Fully opened: 4.2 to 4.7 |
- | |
| Power supply |
B135 | 9 | Sb | |
5 | 5 | - | |
| Ground (sensor) |
B135 | 19 | RG | |
0 | 0 | - | |
| Tumble generator valve RH (open) |
B84 | 4 | LG |  |
0 or 5 | 0 or 5 | - | |
| Tumble generator valve RH (close) |
B84 | 5 | YG |  |
0 or 5 | 0 or 5 | - | |
| Tumble generator valve LH (open) |
B84 | 11 | L |  |
0 or 5 | 0 or 5 | - | |
| Tumble generator valve LH (close) |
B84 | 10 | LY |  |
0 or 5 | 0 or 5 | - | |
| Wastegate control solenoid valve |
B137 | 24 | BW |  |
10 to 13 | 13 to 14 | - | |
| Starter switch | B134 | 16 | Y |  |
0 | 0 | Cranking: 8 to 14 | |
| A/C switch | B134 | 2 | LY | |
ON: 10 to 13 OFF: 0 |
ON: 13 to 14 OFF: 0 |
- | |
| Ignition switch | B134 | 5 | GR |  |
10 to 13 | 13 to 14 | - | |
| Neutral position switch | B134 | 8 | WB | |
ON: 12±0.5 OFF: 0 |
Switch is ON when gear is in neutral position. |
||
| Test mode connector | B134 | 14 | Or |  |
5 | 5 | When connected: 0 | |
| Knock sensor |
Signal | B135 | 4 | W | |
2.8 | 2.8 | - |
| Shield | B135 | 22 | SB | |
0 | 0 | - | |
| Back-up power supply | B137 | 10 | BR |  |
10 to 13 | 13 to 14 | Ignition switch "OFF": 10 to 13 | |
| Control unit power supply |
B137 | 2 | YL |  |
10 to 13 | 13 to 14 | - | |
| B137 | 3 | YL | |
10 to 13 | 13 to 14 | - | ||
| Sensor power supply | B135 | 9 | Sb | |
5 | 5 | - | |
| Line end check 1 | B134 | 10 | RW | |
0 | 0 | - | |
| Ignition control |
Coil #1 | B136 | 24 | Y | |
0 | 13 to 14 | Waveform |
| Coil #2 | B136 | 23 | YB |  |
0 | 13 to 14 | Waveform | |
| Coil #3 | B136 | 22 | YR |  |
0 | 13 to 14 | Waveform | |
| Coil #4 | B136 | 21 | YG | |
0 | 13 to 14 | Waveform | |
| Fuel injector control |
#1 | B137 | 1 | P |  |
10 to 13 | 1 to 14 | Waveform |
| #2 | B136 | 6 | PL | |
10 to 13 | 1 to 14 | Waveform | |
| #3 | B136 | 5 | PB |  |
10 to 13 | 1 to 14 | Waveform | |
| #4 | B136 | 4 | PG |  |
10 to 13 | 1 to 14 | Waveform | |
| Idle air control solenoid valve |
Signal | B136 | 10 | R | |
0 or 13 to 14 | 0 or 13 to 14 | Waveform |
| Fuel pump controller |
Signal 1 | B134 | 13 | LgR |  |
- | - | - |
| Signal 2 | B136 | 15 | VW |  |
- | - | - | |
| A/C relay control | B137 | 27 | Br | |
ON: 0.5, or less OFF: 10 to 13 |
ON: 0.5, or less OFF: 13 to 14 |
- | |
| Radiator fan relay 1 control |
B137 | 17 | RL |  |
ON: 0.5, or less OFF: 10 to 13 |
ON: 0.5, or less OFF: 13 to 14 |
- | |
| Radiator fan relay 2 control |
B137 | 28 | GR | |
ON: 0.5, or less OFF: 10 to 13 |
ON: 0.5, or less OFF: 13 to 14 |
- | |
| Malfunction indicator lamp (Check Engine) |
B137 | 15 | RW | |
- | - | Light "ON": 1, or less Light "OFF": 10 to 14 |
|
| Engine speed (RPM) | B136 | 9 | G | |
- | - | Waveform | |
| Purge control solenoid valve |
B137 | 16 | WL | |
ON: 1, or less OFF: 10 to 13 |
ON: 1, or less OFF: 13 to 14 |
- | |
| Torque control 1 signal | B134 | 19 | RY |  |
5 | 5 | - | |
| Torque control 2 signal | B134 | 18 | PG | |
5 | 5 | - | |
| Torque control cut signal |
B136 | 14 | YR | |
8 | 8 | - | |
| Fuel temperature sensor |
B135 | 6 | LB |  |
2.5 to 3.8 | 2.5 to 3.8 | Ambient temperature: 25°C (75°F) |
|
| Fuel tank pressure sensor |
Signal | B135 | 15 | GOr |  |
2.3 to 2.7 | 2.3 to 2.7 | The value obtained after the fuel filler cap was removed once and recapped. |
| Ground (sensor) |
B134 | 19 | RY | |
0 | 0 | - | |
| Fuel tank pressure control solenoid valve |
B137 | 22 | LgB |  |
ON: 1, or less OFF: 10 to 13 |
ON: 1, or less OFF: 13 to 14 |
- | |
| Drain valve | B137 | 11 | BrY | |
ON: 1, or less OFF: 10 to 13 |
ON: 1, or less OFF: 13 to 14 |
- | |
| AT diagnosis input signal |
B135 | 20 | BrR | |
Less than 1 More than 4 |
Less than 1 More than 4 |
Waveform | |
| AT load signal | B135 | 28 | GW |  |
4.3 to 4.4 | 0.9 to 1.4 | - | |
| Intake manifold air pressure (MAP) sensor |
Signal | B135 | 8 | YB | |
1.7 to 2.4 | 1.1 to 1.6 | - |
| Power supply |
B135 | 9 | Sb | |
5 | 5 | ||
| Ground (sensor) |
B135 | 19 | RG | |
0 | 0 | ||
| Fuel level sensor | B135 | 25 | BrW |  |
0.12 to 4.75 | 0.12 to 4.75 | - | |
| Small light switch | B134 | 17 | BW | |
ON: 0 OFF: 10 to 13 |
ON: 0 OFF: 13 to 14 |
- | |
| Blower fan switch | B134 | 9 | GR | |
ON: 0 OFF: 10 to 13 |
ON: 0 OFF: 13 to 14 |
- | |
| Rear defogger switch | B134 | 3 | L | |
ON: 0 OFF: 10 to 13 |
ON: 0 OFF: 13 to 14 |
- | |
| Power steering oil pressure switch |
B135 | 24 | OrB |  |
10 to 13 | ON: 0 OFF: 13 to 14 |
- | |
| SSM/GST communications line |
B134 | 21 | LgB | |
Less than 1 More than 4 |
Less than 1 More than 4 |
- | |
| Ground (sensors) | B135 | 19 | RB |  |
0 | 0 | - | |
| Ground (injectors) | B136 | 8 | BY | |
0 | 0 | - | |
| Ground (coils) | B136 | 18 | B | |
0 | 0 | - | |
| Ground (power supply) | B136 | 17 | BW | |
0 | 0 | - | |
| B134 | 22 | BW | |
0 | 0 | - | ||
| Ground (control systems) | B134 | 7 | BR | |
0 | 0 | - | |
| B134 | 15 | BR | |
0 | 0 | - | ||
| (*) Wire Colors | |
|---|---|
| Code | Color |
| L | Blue |
| B | Black |
| Y | Yellow |
| G | Green |
| R | Red |
| W | White |
| Br | Brown |
| Lg | Light green |
| Gr | Gray |
| P | Pink |
| Or | Orange |
| Lb | Light blue |
| V | Violet |
| SA | Shielded conductor |
| SB | Shielding braid |
|
If two colors are given, then the first is the base color and the second is the color of a stripe. For example, "Lg" indicates a light green wire, but "LG" indicates a blue wire with a green stripe. |
|