ECM/PCM Inputs and Outputs at Connector B (△) (49P)
NOTE: Standard battery voltage is about 12 V.
Terminal number
Wire color
Terminal name
Description
Signal
1
BLK
PG2 (POWER GROUND)
Ground circuit for ECM/PCM
Less than 0.5 V at all times
3
YEL/BLU
PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE)
Drives EVAP canister purge valve
With engine running, engine coolant below 55 °C (131 °F): battery voltage
With engine running, engine coolant above 55 °C (131 °F): duty controlled
4
BLK/WHT
SO2SHTC (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) HEATER (SENSOR 2))
Drives secondary HO2S heater (sensor 2)
With ignition switch ON (II): battery voltage
With fully warmed up engine running: duty controlled
7
YEL/RED
OPSW (OIL PRESSURE SWITCH)
Detects engine oil pressure signal
With ignition switch ON: about 0 V
With engine running: battery voltage
  8 *1
BLU/RED
OP2SW (2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH)
Detects 2nd clutch transmission fluid pressure switch input
With ignition switch ON (II):
Without 2nd clutch pressure: about 5.0 V
With 2nd clutch pressure: about 0 V
  9 *1
BLU/WHT
OP3SW (3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH)
Detects 3rd clutch transmission fluid pressure switch input
With ignition switch ON (II):
Without 3rd clutch pressure: about 5.0 V
With 3rd clutch pressure: about 0 V
10
BLK
PG1 (POWER GROUND)
Ground circuit for ECM/PCM
Less than 0.5 V at all times
  11 *1
BLU/BLK
SHA (SHIFT SOLENOID VALVE A)
Drives shift solenoid valve A
With engine running in R, D, and S (in 1st, 4th, and 5th gears): battery voltage
With engine running in P, N, D, and S (in 2nd and 3rd gears) and 2: about 0 V
  12 *1
GRN/WHT
SHB (SHIFT SOLENOID VALVE B)
Drives shift solenoid valve B
With engine running in P, R, N, D, and S (in 1st and 2nd gears): battery voltage
With engine running in D and S (in 3rd, 4th, 5th gears): about 0 V
  13 *1
RED/BLK
ATPN (TRANSMISSION RANGE SWITCH N)
Detects transmission range switch N position signal input
In N: about 0 V
In any position other than N: battery voltage
  14 *1
BLU/BLK
ATPP (TRANSMISSION RANGE SWITCH P)
Detects transmission range P position signal input
In P: about 0 V
In any position other than P: battery voltage
  15 *1
WHT
ATPR (TRANSMISSION RANGE SWITCH R)
Detects transmission range switch R position signal input
In R: about 0 V
In any position other than R: battery voltage
  16 *1
RED
ATPS (TRANSMISSION RANGE SWITCH S)
Detects transmission range switch S position signal input
In S: about 0 V
In any position other than S: battery voltage

*1:
A/T