Acura Integra 1998 Service Manual page 245

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Troubleshooting
ECM CONNECTOR {31P)
Engine Control Module Terminal Arrangement (cont'd)
ECM CONNECTOR C {31P)
2
3 5
srs
scs
1 1 1 2 t 3
15 1 5 t 7 1 A 1 9
2A
W i r e s i d e o f l e m a l e t e r m i n a l s
NOTE: Standard battery voltage is 12 V.
Terminal
number color
Terminal namo
D6scription S i g n a l
1
BLU/RED CKF P (CKF SENSOR P SIDE)
Detects CKF sensor.
With engine running: pulses
2 8 L U
CKP P (CKP SENSOR P SIDE)
Detects CKP sensor.
With engine running: pulses
3
GRN TDC P {TDC SENSOR P SIDE)
Detects TDC sensor,
With engine running: pulses
YEL
CYP P (CYP SENSOR P SIDE)
Detects CYP sensor,
With engine running: pulses
5 BLU/RED
ACS (AJC SWITCH SIGNAL)
Detects A,/C switch signal.
With A,/C switch ON: 0 V
With A,/C switch OFF: battery voltage
6
BLUA/VHT
STS (STARTEB SWITCH
SIGNAL)
Detects starter switch signal.
With staner switch ON: battery voltage
With starter switch OFF: 0 V
7 BRN,AiVHT
SCS (SERVICE CHECK
SIGNAL)
Detects service check connector
s i g n a l ( t h e s i g n a l c a u s i n g
a D T C
;ndication).
With the co n nector con nected: 0 V
Wath the connector disconnected: about 5 V
8 GRNAVHT
K LINE S e n d s a n d r e c e i v e s O B D l l s c a n
t o o l a n d P G M t e s t e r s i g n a l .
W i t h i g n i t i o n s w i t c h O N ( l l ) : a b o u t 5 V
9 YEL
FAS lFEEDBACK AT SIGNAL) S e n d s f e e d b a c k s i g n a l f o r t h e
T C M ,
At idle: about 5 V
During shifting: momenlary change to 0 V
1 0 WHT/BLU
VBU (VOLTAGE BACK UP) Power source for the ECM
controlcircuit,
Power source for the DTC
B a t t e r y v o l t a g e a t a l l t i m e s
t 1
WHT/RED CKF M (CKF SENSOR I\4 SIDE)
Ground for CKF sensor.
12 BLUI/E L
CKP M (CKP SENSOR M SIDE)
Ground for CKP sensor.
WHT/BLU
TDCM (TDC SENSOR M SIDE)
Ground tor TDC sensor.
1 4
CYPM (CYP SENSOR M SIDE)
Ground for CYP sensor.
1 5 * .
BLU/BLK
VTP SW (VTEC
PRESSUFE SWITCH)
Detects VTEC pressure switch
sr9nal.
With engine at low rpm:0 V
With engine at high rpml
battery voltaqe
1 6 1 ,
GRN
PSPSW (P/S OIL
PRESSURE SWITCH)
D e r e c l s P S P s w i t c h s i g n a l .
At idle with steering wheel in straight ahead
positioni 0 V
At idle with steering wheelat full lock: battery
voltage
1 7
WHT/RED
ALTF (ALTERNATOR
FR
SIGNAL)
D e t e c t s a l t e r n a t o r F R s i g n a l .
With fully warmed up engine running:
0 V battery voltage (depending on
electrical load)
1 8 ORN
VSS (VEHICLE SPEED
S E N S O R i
Detects VSS signal.
With ignition switch ON (ll) and lront
wheels rotating: cycles 0 V- 5 V
1 9 * 3
BLU
AT CHK (A/T FI DATA LINE)
Detects TCM data signal.
W i t h i g n i t i o n s w i t c h O N ( l l ) i p u l s e s
21*
LT GRN
BARO OUT (SAROMETRIC
SENSOR OUTPUT S!GNAL)
Sends barometric sensor output
s r g n a l ,
W i t h i g n i t i o n s w i t c h O N ( l l ) : a b o u t 3 V
( d e p e n d i n g o n b a r o m e t r i c p r e s s u r e )
27 x3
GRY
A F S B ( A " / T F I S I G N A L B ) Detects retard signal from the
TCM,
At idle: about 5 V
During shifting: momentary change
t o 0 V
28+1
GRN/8LU
A+SA (A/T FI SIGNAL A)
Detects retard signal from the
T C M .
At idle: about 5 V
During shifting: momentarV change
t o 0 V
2 9 + 3
LT GRN/
BLK
ATPPN (A/T GEAR
POSITION SWITCH)
Detects A,/T gear position switch
srgnal-
I n E o r E p o s i t i o n r 0 V
In anv other position: battery voltage
* 1 : U S A
* 2 : 8 1 8 C 1 e n g i n e
*3: A/T
* 4 : 8 1 8 C 1 , 8 1 8 C 5 e n g i n e s