signal
Battery voltage
B16
BRN
ATP 2-1
(TRANSMISSION
RANGE SWITCH 2-
1)
Detects
transmission
range switch
2 position and
1 position
signal
In 2 and 1:
About 0 V
In any position
other than 2
and 1: Battery
voltage
B17
WHT/RED NM (INPUT SHAFT
(MAINSHAFT)
SPEED SENSOR)
Detects input
shaft
(mainshaft)
speed sensor
signal
With the
ignition switch
ON (II): About
0 V or about
5.0 V
With engine
idling in N:
About 2.5 V
(pulses)
B18
YEL/BLU VCC2 (SENSOR
VOLTAGE)
Provides
sensor
reference
voltage
With the
ignition switch
ON (II): About
5.0 V
B20
GRN
SH C (SHIFT
SOLENOID VALVE
C)
Drives shift
solenoid
valve C
With engine
running in R,
D3 (in 3rd
gear), and D
(in 3rd gear):
Battery voltage
With engine
running in P,
N, 2, D3 (in 1st
and 2nd gears),
and D (in 1st,
2nd, 4th, and
5th gears):
About 0 V
B21
YEL/GRN ATP D
Detects
In D: About 0
2008 Honda Civic LX
2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)