Electronic Control System (cont'd)

PCM A/T Control System Inputs and Outputs - R20A3 Engine Model (cont'd)


PCM CONNECTOR B △ (44P)

Terminal Number
Wire Color
Terminal Name
Description
Signal
B1
BLK
PG2 (POWER GROUND)
Ground circuit for PCM
Less than 0.5 V at all times
B8
BLU/YEL
OP2SW (2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH)
Detects 2nd clutch transmission fluid pressure switch signal
With ignition switch ON (II):
  • Without 2nd clutch pressure: About 5.0 V
  • With 2nd clutch pressure: About 0 V
B9
BLK/RED
OP3SW (3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH)
Detects 3rd clutch transmission fluid pressure switch signal
With ignition switch ON (II):
  • Without 3rd clutch pressure: About 5.0 V
  • With 3rd clutch pressure: About 0 V
B10
BLU
SH A (SHIFT SOLENOID VALVE A)
Drives shift solenoid valve A
With engine running:
In R, D and S (1st, 4th, and 5th gears): Battery voltage
In P, N, D and S (2nd and 3rd gears): About 0 V
B11
GRN/WHT
SH B (SHIFT SOLENOID VALVE B)
Drives shift solenoid valve B
With engine running:
In P, R, N, D and S (1st and 2nd gears): Battery voltage
In D and S (3rd, 4th, and 5th gears): About 0 V
B12
RED/BLK
ATP N (TRANSMISSION RANGE SWITCH N)
Detects transmission range switch N position signal
In N: About 0 V
In any position other than N: About 5.0 V
B13
BLU/BLK
ATP P (TRANSMISSION RANGE SWITCH P)
Detects transmission range switch P position signal
In P: About 0 V
In any position other than P: More than about 5.0 V
B14
WHT/GRN
ATP R (TRANSMISSION RANGE SWITCH R)
Detects transmission range switch R position signal
In R: About 0 V
In any position other than R: More than about 5.0 V
B15
RED
ATP S (TRANSMISSION RANGE SWITCH S)
Detects transmission range switch S position signal
In S: About 0 V
In any position other than S: About 5.0 V
B17
WHT/RED
NM (INPUT SHAFT (MAINSHAFT) SPEED SENSOR)
Detects input shaft (mainshaft) speed sensor
With ignition switch ON (II): About 0 V or about 5.0 V
With engine running in N: About 2.5 V (pulses)
B18
YEL/BLU
VCC2 (SENSOR VOLTAGE)
Provides sensor voltage
With ignition switch ON (II): About 5.0 V
With ignition switch LOCK (0): About 0 V


PCM CONNECTOR B △ (44P)

Terminal Number
Wire Color
Terminal Name
Description
Signal
B20
GRN
SH C (SHIFT SOLENOID VALVE C)
Drives shift solenoid valve C
With engine running:
  • In N, D and S (1st, 3rd, and 5th gears): Battery voltage
  • In P, R, D and S (2nd and 4th gears): About 0 V
B21
YEL/GRN
ATP D (TRANSMISSION RANGE SWITCH D)
Detects transmission range switch D position signal
In D: About 0 V
In any position other than D: About 5.0 V
B22
YEL
ATP RVS (TRANSMISSION RANGE SWITCH)
Detects transmission range switch R position signal
In R: About 0 V
In any position other than R: About 5.0 V
B24
YEL
SH E (SHIFT SOLENOID VALVE E)
Drives shift solenoid valve E
With engine running:
In P and R: Battery voltage
In N, D and S (1st gear): About 0 V
B25
BLU/WHT
LS C (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C)
Drives A/T clutch pressure control solenoid valve C
With ignition switch ON (II): Current controlled
B26
GRN/RED
SH D (SHIFT SOLENOID VALVE D)
Drives shift solenoid valve D
With engine running:
In D and S (2nd and 5th gears): Battery voltage
In P, R, N, D and S (1st, 3rd, and 4th gears): About 0 V
B27
RED/YEL
ATFT (ATF TEMPERATURE SENSOR)
Detects ATF temperature sensor signal
With ignition switch ON (II): About 0.2−4.8 V depending on ATF temperature
With ignition switch LOCK (0): About 0 V
B28
BLU/YEL
ATP FWD (TRANSMISSION RANGE SWITCH FWD)
Detects transmission range switch D and S positions signal
In D and S: About 0 V
In any position other than D and S: About 5.0 V
B33
GRN/BLK
SG2 (SENSOR GROUND)
Sensor ground
Less than 0.5 V at all times
B35
BRN
LS B (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B)
Drives A/T clutch pressure control solenoid valve B
With ignition switch ON (II): Current controlled
B36
BLK
PG1 (POWER GROUND)
Ground circuit for PCM
Less than 0.5 V at all times
B44
WHT
LS A (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE A)
Drives A/T clutch pressure control solenoid valve A
With ignition switch ON (II): Current controlled