lemon-mirror:
Home >> Subaru >> 1990 >> XT 1.8 5 >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Pin Voltage Charts >> LOYALE

Engine Controls - Pin Voltage Charts: LOYALE

  1. ECU circuits are checked at the ECU connector with ignition in one or more of the following conditions; ignition off, ignition on and engine off, or with ignition on and engine running. Test each terminal between indicated terminal No. and body ground. Use wire color to help identify terminal. To test pin voltage, carefully backprobe terminal at harness side of ECU connector. See Fig 1 and Fig 2 . See ECU CONNECTOR TERMINAL IDENTIFICATION table below.
  2. If specified resistance or voltage value is not found, test and repair, or replace circuit or affected component. Retest circuit to verify repair has been made. All tests are with ECU harness connected unless noted.
NOTE: NCA stands for No Color Available.
Fig 1: Identifying Loyale ECU Connector Terminals (PFI)
G118419Courtesy of SUBARU OF AMERICA, INC.
LOYALE (PFI) ECU CONNECTOR TERMINAL IDENTIFICATION

Terminal Color Identification
1 YR Check Connector (Used at Line End Only)
2 SA Air Flow Meter (Signal)
3 GL Purge Control Solenoid
4 YL Neutral Switch (MT)
5 B Air Flow Meter (Ground)
6 LB Fuel Pump Relay
7 R Crank Angle Sensor (Power)
8 W Crank Angle Sensor (Reference)
9 WB Water Temperature Sensor
10 BR Ground
11 ***** *****
12 SA Air Flow Meter (Power)
13 RB Duty Solenoid (Waste Gate Control)
14 YW Inhibitor Switch
15 GY Inhibitor Switch
16 BR Throttle Sensor (Ground)
17 W Crank Angle Sensor (Ground)
18 ***** *****
19 BW Ignition Switch Signal
20 BR Ground
21 W Throttle Sensor (Power Supply)
22 B Throttle Sensor (Signal)
23 LY Air Conditioner Signal
24 BW Starter Signal
25 LW Idle Switch Signal
26 ***** *****
27 WR Control Unit Power (Input)
28 BY Identification of Specifications
29 YG Car-Speed Sensor
30 BR Identification of AT
31 ***** *****
32 Br Test Mode Connector
33 LgW Read-Memory Connector
34 ***** *****
35 WR Control Unit Power (Input)
36 SA Knock Sensor
37 WY Ignition Output (Power Transistor)
38 LgR Air Flow Meter (Burn-Off Output)
39 GW Self-Shutoff Output
40 RY ECS Lamp Output This space should be left blank)
42 BrB Kick Down Relay (3AT)
43 WY Ignition Output (Power Transistor)
44 RL Check Connector
45 GB Check Connector
46 L Check Connector
47 R Check Connector (Used at Line End Only)
48 SA O2 Sensor
49 W Fuel Injector #1
50 W Fuel Injector #2
51 WR Fuel Injector #3
52 WR Fuel Injector #4
53 ***** *****
54 ***** *****
55 SA Fuel Pump Control
56 B Ground
57 B Ground
58 ***** *****
59 L A/C Cut Relay (3AT)
60 BR Ground
61 BR Ground
62 R Power (Input)
63 ***** *****
WIRING COLOR CODE

Color Code Wire Color
B Black
Br Brown
G Green
Gr Gray
L Blue
Lg Light Green
R Red
W White
Y Yellow
LOYALE ECU PIN SPECIFICATIONS - PFI

ECU Terminal-Wire Color Condition Volts or Ohms
No. 2-NCA Ign. On 1-2 V
No. 3-Green/Blue Ign. On (2) 0-10 V
No. 4-Yellow/Blue (1) Ign. Off 0 Ohms in "N"
No. 6-Blue/Black Ign. On (2) 0-10 V
No. 7-Red Ign. On 10-12 V
No. 8-White Ign. On (3) .1 or 4-5 V
No. 9-White/Black (1) Ign. Off 100-20,000 Ohms
No. 10-Brown/Red (1) Ign. Off 0 Ohms
No. 12-NCA Ign. On 10-12 V
No. 13-Red/Black Ign. On (2) 0-10 V
No. 17-White Ign. On (4) .1 or 4-5 V
No. 19-Black/White (1) Ign. On 10-12 V
No. 20-Brown/Red (1) Ign. Off 0 Ohms
No. 24-Black/White Ign. On (5) 10-12 V
No. 25-Blue/White (1)
Closed Throttle Ign. Off 0 Ohms
Open Throttle Ign. Off Infinity
No. 27-White/Red (1) Ign. On 10-12 V
No. 29-Yellow/Green Eng. On (6) 1-3 V
No. 35-White/Red (1) Ign. On 10-12 V
No. 36-NCA (1) Ign. Off 532-588 k/ohms
No. 48-NCA Eng. On .1-1.0 V
No. 49-White (1) Ign. On 10-12 V
No. 50-White (1) Ign. On 10-12 V
No. 51-White/Blue (1) Ign. On 10-12 V
No. 52-White/Red (1) Ign. On 10-12 V
No. 55-NCA Ign. On (2) 0-10 V
No. 56-Black (1) Ign. Off 0 Ohms
No. 57-Black (1) Ign. Off 0 Ohms
No. 60-Brown/Red (1) Ign. Off 0 Ohms
No. 61-Brown/Red (1) Ign. Off 0 Ohms
No. 62-Red (1) Ign. On 10-12 V
(1) ECU harness disconnected.
(2) Fluctuates every 1.5 seconds with test connectors attached.
(3) Fluctuates 0-5 volts while cranking with starter.
(4) Fluctuates 0-5 volts while slowly turning crankshaft hub nut with wrench.
(5) 10-12 volts with ignition in start position.
(6) Fluctuates around 2 volts while driving vehicle.
Fig 2: Identifying Loyale ECU Connector Terminals (TBI)
G118421Courtesy of SUBARU OF AMERICA, INC.
LOYALE (PFI) ECU CONNECTOR TERMINAL IDENTIFICATION

Terminal Color Identification
1 LG Kick-Down Control
2 RL CHECK ENGINE Light
3 R Test 4
4 LR EGR Solenoid (Control)
5 GL Purge Control Solenoid
6 LY Air Conditioner signal
7 ***** *****
8 W Air Flow Meter (Signal)
9 B Air flow Meter (GND)
10 Y Line End Cord Output
11 L Line End Cord Output
12 RL Line End Cord Output
13 YR Inhibitor Switch (AT Models Only)
14 YG Neutral Switch
15 YL Parking Switch (AT Models Only)
16 LgY Kick-Down Meter
17 R Air Flow Meter Power (Output)
18 LgY Starter Switch
19 GB Crank Angle Sensor Power (Output)
20 GY Crank Angle Sensor Signal (Reference)
21 BW Crank Angle Sensor Signal (Position)
22 YG Car-Speed Sensor
23 WB Water Temperature Sensor
24 LG Idle Switch
25 W Throttle Sensor (Signal)
26 R Throttle Sensor Power (Output)
27 BW Power (Input)
28 GW Self-Shutoff Signal
29 W Power (Input)
30 Br GND
31 Br Test Mode Connector (Used at Line End Only)
32 BR Test Mode Connector (Used at Line End Only)
33 Lg 49-State/Cal Identification
34 SA O2 Sensor
35 B GND
36 WR EGR Monitor
37 LgR Test Mode Connector (Used at Line End Only)
38 RL Ignition Switch
39 LgW Clear Memory
40 ***** *****
41 W Power (Input)
42 BR GND
43 RW Injector (+)
44 BR GND
45 GR Air Control Valve
46 GY A/C Control
47 LB Fuel Pump
48 RB Injector (-)
49 RL Power (Input)
50 BY GND
51 B GND
52 WY Ignition Control
LOYALE ECU PIN SPECIFICATIONS - TBI

ECU Terminal-Wire Color Condition Volts or Ohms
No. 1-Blue/Green (1) Ign. On 0-1 V
No. 4-Blue/Red Ign. On (2) 0-10 V
No. 5-Green/Blue Ign. On (2) 0-10 V
No. 8-White Eng. On .1-.5 V
No. 9-Black (1) Ign. Off 0-9 Ohms
No. 13-Lt. Green/Yellow Ign. On (5) 10-12 V
No. 14-Yellow/Green (1)
A/T or M/T in "N" Ign. Off Infinity Ohms
A/T or M/T Any Gear Ign. Off 0 Ohms
No. 15-Yellow/Blue (1) Ign. Off Infinity in "N"
No. 15-Yellow/Blue (1) Ign. Off 0 Ohms in Any Gear
No. 17-Red Ign. On 10-12 V
No. 19-Green/Black (1) Ign. On 10-12 V
No. 20-Green/Yellow Ign. On (4) .1 or 4-5 V
No. 21-Black/White Ign. On (3) .1 or 4-5 V
No. 22-Yellow/Green Eng. On (6) 1-3 V
No. 23-White/Black (1) Ign. Off 100-20,000 Ohms
No. 24-Blue/Green (1)
Closed Throttle Ign. Off 0 Ohms
Open Throttle Ign. Off Infinity
No. 27-Black/White (1) Ign. On 10-12 V
No. 29-White (1) Ign. On 10-12 V
No. 30-Brown/Red (1) Ign. Off 0 Ohms
No. 36-White/Red (1) Ign. Off Over 250 Ohms
No. 41-White (1) Ign. On 10-12 V
No. 42-Brown/Red (1) Ign. Off 0 Ohms
No. 44-Brown/Red (1) Ign. Off 0 Ohms
No. 45-Green/Red Ign. On (7) 0-1 V
No. 48-NCA Eng. On .1-1.0 V
No. 49-Red/Blue (1) Ign. On 10-12 V
No. 51-Black (1) Ign. Off 0 Ohms
(1) ECU harness disconnected.
(2) Fluctuates every 1.5 seconds with test connectors attached.
(3) Fluctuates 0-5 volts while cranking with starter.
(4) Fluctuates 0-5 volts while slowly turning crankshaft hub nut with wrench.
(5) 10-12 volts with ignition in start position.
(6) Fluctuates around 2 volts while driving vehicle.
(7) After ignition is turned on, 0-1 volts for 1 minute and over 10 volts after 1 minute.
· About lemon-mirror