Pontiac Fiero 1988 Service Manual page 461

6E2-A-6 DRIVEABILITY AND EMISSIONS - F U E L INJECTION (TBI)
FUEL INJECTION ECM CONNECTOR IDENTIFICATION
This ECM voltage chart is for use with a digital voltmeter to further aid in diagnosis. The voltages you get
may vary due to low battery charge or other reasons, but they should be very close.
THE FOLLOWING CONDITIONS MUST BE MET BEFORE TESTING:
® Engine at operating temperature • Engine idling in closed loop (for "Engine Run" column)
•Test terminal not grounded • "Scan" tool not installed
B + Indicates battery or charging system voltage
VOLTAGE VOLTAGE
©
KEY
"ON'
ENG.
RUN CIRCUIT ! >IN i
WIRE
IOLOR
W H l l f c
- i l w l r -
WIRE
COLOR. PIN
CIRCUIT
KEY
o r
ENG.
RUN
0
©
R * IN I F f T H R n m v / F
L U C RLU
| W 1 | | W24 |
I II
I
I"
IL_J
I ICZJ
DK.GRN/
WHT
W24 FUEL PUMP
12,0
13.0
0
©
n
fl A/f R F Q U F S T
J§£2_
DK GRN/
W H T
| W 1 | | W24 |
I II
I
I"
IL_J
I ICZJ
XfcKLGRAL W23.
VSS
I N P U T
© ©
0
©
N O T S K F H
| W 1 | | W24 |
I II
I
I"
IL_J
I ICZJ
W22 NOT USED
0
©
TR1IKF WJ.
GRY/
R l
IC
DK BLU
W21 CRUISE
0
©
NOT USED W5
I ICZI
i
\nn
I ! •
Z D
GRY W20 CRUISE
0
©
0
1.3 EST W6 WHT
I ICZI
i
\nn
I ! •
Z D
TAN/
BLK W19
BY-PASS
0
©
© 0
IAC "A" HI W7
LT.BLU/
WHT
I ! •
Z D
ORN/
BLK
W18
P/N SWITCH
0
0
0
©
©
0
IAC "B" LOW W8
LT GRN/
BLK
r n
i
Z D
LT.BLU
BLK W17 IAC "A" LOW
© ©
0
©
© 0
IAC "B" HI W9
LT.GRN/
WHT
I II
i
Z D
PNK/
BLK
W16
12 V IGN.
0
©
B +
B +
12V BATT
W10
ORN
| W12 | | W13 |
Z D
ORN
W15
12V BATT. B + B +
0
©
5.0 5.0
5 VOLT
REFERENCE W11
GRY
OA
PIN
Z D
©
W14 MAP.MAT.GND 0 *
Q*
0
©
0 *
3 * ECM GROUND W12
BLK/
WHT
CONNECTOR
BLK/
WHT
W13 ECM GROUND 0 * 0 *
0
BLACK
r
i(B)~-—«,
2-5
v o l t s
varina SERIAL DATA B1 ORN
| B 1
| | 8 2 4
1
•ZD
LT.BLU/
BLK B24
A/C SIGNAL
FOR FAN 0 *
0* ©
©
.33-5! 1-9
OXYGEN SENSOR
SIGNAL B2 PPL
| B 1
| | 8 2 4
1
•ZD
TAN B23
OXYGEN SENSOR
GROUND 0 * 0 *
©
©
B + B +
A/C CLUTCH
RELAY B3
DK
BLU
| B 1
| | 8 2 4
1
•ZD
BUM/
WHT
m
SERVICE ENG.
SOON LITE 0 *
B +
©
©
B + B +
FAN
(H.D. COOL)
B4
LT. GRN/
BLK
1
II 1
•ZD
DK.GRN/
WHT B21
ENG. COOLING
.JEAN
J 5 * B +
©
©
1.3 1.3 MAT B5 TAN
•ZD
LT.GRN B20
MAP
4.75
1 1
©
©
NOT
USED
B6
a ?
DK.BLU
B19 TPS .6 .6
©
©
TCC OR
SHIFTLITE
B7
TAN/
BLK
HHrH
WHT B18 CRUISE
©
©
1.9 1.9 COOLANT
B8
YEL
HHrH
B17
NOT
USED
©
©
4.6
30
IGNITION
REF. HI
B9
PPL/
WHT
H H
BLK/
RED
916
GROUND
(IGN. REF. LOW)
Q *
0*
©
©
CRUISE B10 LT GRN
H H
WHT/
BLK
B15
ALDL DIAG.
5
5
CRUISE
B11
DK BLU/
WHT
I
B12
II
B13 |
1 r — — — 1
DKBRN B14 CRUISE
0 * 0 *
COOLANT AND
TPS GND. B12 BLK
1 1
B13
NOT
IJSED
. ^^^^..^.^— - • — —• z«* rm
CONNECTOR
* All voltages shown "0" should read less than .5 volt
©This wire may also have tracer color
®A/C.
Fan Off
©Varies from 0 to 10 volts dependinq on position of drive wheels ENGINE 2.5L
©Reads battery voltage for 2 seconds after ignition " o n " then should read 0 volts CARLINE
_ P _
© Varies depending on temperature 5-18-86
© Not useable * 7S 3603-6
Figure A-5 - 2.5L - "P" SERIES ECM Terminal End View