ECM/PCM Inputs and Outputs at Connector C (○) (49P)
NOTE: Standard battery voltage is about 12 V.
Terminal number
Wire color
Terminal name
Description
Signal
1
YEL/GRN
IG1ETCS (IGNITION SIGNAL ETCS)
Detects ignition signal
With ignition switch ON (II): battery voltage
2
BLK
PGMETCS (POWER GROUND ETCS)
Ground circuit for ECM/PCM
Less than 0.5 V at all times
3
GRN/YEL
ETCSM− (THROTTLE ACTUATOR −SIDE)
Ground for throttle actuator
With ignition switch ON (II) and accelerator pedal released: about 0 V
With ignition switch ON (II) and accelerator pedal pressed: about 2.0 V
4
BLU/RED
ETCSM+ (THROTTLE ACTUATOR +SIDE)
Drives throttle actuator
With ignition switch ON (II) and accelerator pedal released: about 0 V
With ignition switch ON (II) and accelerator pedal pressed: about 0 V
5
BRN
INJ1 (No. 1 INJECTOR)
Drives No. 1 injector
With ignition switch ON (II): battery voltage
At idle: duty controlled
6
RED
INJ2 (No. 2 INJECTOR)
Drives No. 2 injector
7
BLU
INJ3 (No. 3 INJECTOR)
Drives No. 3 injector
8
YEL
INJ4 (No. 4 INJECTOR)
Drives No. 4 injector
9
GRN
AFSHTC (AIR FUEL RATIO (A/F) SENSOR HEATER CONTROL (SENSOR 1))
Drives A/F sensor heater (sensor 1)
With ignition switch ON (II): battery voltage
With fully warmed up engine running: pulses
10
BLK/RED
IG1 (IGNITION SIGNAL)
Detects ignition signal
With ignition switch ON (II): battery voltage
11
GRN/RED
MAP (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR)
Detects MAP sensor signal
With ignition switch ON (II): about 3.0 V
At idle: about 1.0 V (depending on engine speed)
12
BLU
VCC3 (SENSOR VOLTAGE)
Provides sensor reference voltage
With ignition switch ON (II): about 5.0 V
13
YEL/RED
VCC1 (SENSOR VOLTAGE)
Provides sensor reference voltage
With ignition switch ON (II): about 5.0 V
14
GRN/WHT
SG1 (SENSOR GROUND)
Sensor ground
Less than 0.5 V at all times
15
YEL/GRN
IGPLS1 (No. 1 IGNITION COIL PULSE)
Drives No. 1 ignition coil
With ignition switch ON (II): about 0 V
With engine running: pulses
16
BLU/RED
IGPLS2 (No. 2 IGNITION COIL PULSE)
Drives No. 2 ignition coil
17
WHT/BLU
IGPLS3 (No. 3 IGNITION COIL PULSE)
Drives No. 3 ignition coil
18
BRN
IGPLS4 (No. 4 IGNITION COIL PULSE)
Drives No. 4 ignition coil