Electronic Control System (cont'd)

PCM A/T Control System Electrical Connections - R20A3 Engine Model


PCM A/T Control System Inputs and Outputs - R20A3 Engine Model


PCM CONNECTOR A □ (44P)

Terminal Number
Wire Color
Terminal Name
Description
Signal
A6
RED/BLK
MRLY (PGM-FI MAIN RELAY)
  • Drives PGM-FI main relay 1
  • Power source for DTC memory
With ignition switch ON (II): About 0 V
With ignition switch LOCK (0): Battery voltage
A8
YEL/BLK
IGP (POWER SOURCE)
Power source for PCM
With ignition switch ON (II): Battery voltage
With ignition switch LOCK (0): About 0 V
A24
BRN
VCC5 (SENSOR VOLTAGE)
Provides sensor reference voltage
With ignition switch ON (II): About 5.0 V
With ignition switch LOCK (0): About 0 V
A25
RED
VCC4 (SENSOR VOLTAGE)
Provides sensor reference voltage
With ignition switch ON (II): About 5.0 V
With ignition switch LOCK (0): About 0 V
A27
PNK
SLS (SHIFT LOCK SOLENOID)
Drives shift lock solenoid
With ignition switch ON (II), in P, brake pedal pressed, and accelerator pedal released: About 0 V
A31
ORN
SCS (SERVICE CHECK SIGNAL)
Detects service check signal
With the service check signal shorted using HDS: About 0 V
With the service check signal opened: About 5.0 V
A32
LT BLU
SUPP (PADDLE SHIFTER + (UPSHIFT SWITCH))
Detects paddle shifter + (upshift switch) signal
With paddle shifter + (upshift switch) pulled: About 0 V
With paddle shifter + (upshift switch) released: Battery voltage
A34
GRN
SG5 (SENSOR GROUND)
Sensor ground
Less than 0.5 V at all times
A35
BLU
SG4 (SENSOR GROUND)
Sensor ground
Less than 0.5 V at all times
A36
WHT
CAN H (CAN COMMUNICATION SIGNAL HIGH)
Sends and receives communication signal
With ignition switch ON (II): Pulses
A37
RED
CAN L (CAN COMMUNICATION SIGNAL LOW)
Sends and receives communication signal
With ignition switch ON (II): Pulses
A38
BLK/RED
VB SOL (POWER SOURCE FOR SOLENOID VALVES)
Power source for solenoid valves
With ignition switch ON (II): Battery voltage
With ignition switch LOCK (0): About 0 V
A40
LT GRN
BK SW (BRAKE PEDAL POSITION SWITCH)
Detects brake pedal position switch signal
With brake pedal released: About 0 V
With brake pedal pressed: Battery voltage
A43
PUR
SDNP (PADDLE SHIFTER − (DOWNSHIFT SWITCH))
Detects paddle shifter − (downshift switch) signal
With paddle shifter − (downshift switch) pulled: About 0 V
With paddle shifter − (downshift switch) released: Battery voltage