ECM Inputs and Outputs at Connector B (△) (44P)
NOTE: Standard battery voltage is about 12 V.
Terminal number
Wire color
Terminal name
Description
Signal
30
RED/BLU
VG+ (MASS AIR FLOW (MAF) SENSOR +SIDE)
Detects MAF sensor signal
At idle: 1.1−1.6 V (between VG+ terminal and VG− terminal)
31
RED/YEL
IAT (INTAKE AIR TEMPERATURE (IAT) SENSOR)
Detects IAT sensor signal
With ignition switch ON (II): about 0.1−4.0 V
(about 1.8 V at normal operating temperature)
32
BLK/RED
VG− (MASS AIR FLOW (MAF) SENSOR −SIDE)
Ground for MAF sensor signal
With ignition switch ON (II): about 0 V
33
GRN/YEL
SG2 (SENSOR GROUND)
Sensor ground
Less than 1.0 V at all times
34
BLK/WHT
VTS (ROCKER ARM OIL CONTROL SOLENOID)
Drives rocker arm oil control solenoid
At idle: about 0 V
36
BLK
PG1 (POWER GROUND)
Ground circuit for ECM circuit
Less than 1.0 V at all times
37
BRN
IMT+ (INTAKE MANIFOLD TUNING (IMT) ACTUATOR +SIDE)
Drives IMT actuator
With ignition switch ON (II): battery voltage
38
WHT/BLK
IMT− (INTAKE MANIFOLD TUNING (IMT) ACTUATOR −SIDE)
Ground for IMT actuator
With ignition switch ON (II): battery voltage
39
WHT
IMTM (INTAKE MANIFOLD TUNING (IMT) VALVE MONITOR)
Detects IMT valve position
With ignition switch ON (II): about 0 V
With engine speed above 5,200 rpm (min −1 ): about 5.0 V
41
WHT/GRN
ALTC (ALTERNATOR CONTROL)
Sends alternator control signal
With warned up engine running: 5.0 V (depending on electrical load)
42
WHT/BLU
ALTL (ALTERNATOR L SIGNAL)
Detects alternator L signal
With ignition switch ON (II): about 0 V
With engine running: battery voltage
43
WHT/RED
ALTF (ALTERNATOR FR SIGNAL)
Detects alternator FR signal
With engine running: about 2.6−3.4 V (depending on electrical load)