DIAGNOSTICS
SERVICE MANUAL NUMBER 24
90-861327--1 OCTOBER 1999
Page 5G-7
J-1 Circuits with MEFI 1 and MEFI 2 (Continued)
Pin
Normal Voltage
Pin
Pin
Func-
tion
CKT
Wire
Color
Ignition
ON
Engine
Running
DTC
Possible Symptoms
J1-1
Knock
Sensor
485
GRN
9.5V
9.5V
43
Poor Fuel Economy, Poor
Performance Detonation
J1-2
ECT
Signal
410
YEL
1.95V
(NOTE 2)
1.95V
(NOTE 2)
14
Poor Performance, Exhaust Odor,
Rough Idle rpm Reduction
J1-4
Discrete
Switch
931
BRN
–
–
None
Power Reduction Mode Alarm
Activation
J1-5
Master/
Slave
916
YEL
B+
B+
None
Lack Of Data From Other Engine
(Dual Engine Only)
J1-6
Discrete
Switch
931
BRN
–
–
None
Power Reduction Mode Alarm
Activation
J1-7
Diag-
nostic
Test
451
BLK/
WHT
B+
B+
None
Incorrect Idle, Poor Performance
J1-9
Map
Signal
432
LT
GRN
4.9V
1.46V
(NOTE 3)
33
Poor Performance, Surge, Poor Fuel
Economy, Exhaust Odor
J1-10
TP
Signal
417
DK
BLU
.62V
(NOTE 4)
.62V
(NOTE 4)
21
Poor Performance And Acceleration,
Incorrect Idle
J1-11
Ignition
Fused
439
PNK/
BLK
B+
B+
None
No Start
J1-13
Sensor
Ground
813
BLK
0
(NOTE 5)
0
(NOTE 5)
21,23
High Idle, Rough Idle, Poor
Performance Exhaust Odor
J1-14
ECM
Ground
450
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
None
No Start
J1-15
TP 5V
Power
416
GRY
5V
5V
21
Lack Of Power, Idle High
J1-16
Battery
440
ORN
B+
B+
None
No Start
J1-18
Serial
Data
461
ORN/
BLK
5V
5V
None
No Serial Data
J1-19
Shift
Switch
923
WHT
0
0
None
Incorrect Idle
J1-21
Lanyard
Stop
942
PNK
0
0
None
No Start
J1-29
MAP
Ground
814
BLK
0
(NOTE 5)
0
(NOTE 5)
33
Lack Of Performance,Exhaust Odor,
Stall
J1-30
ECM
Ground
450
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
None
No Start
J1-31
MAP 5V
Power
416
GRY
5V
5V
33
Lack Of Power, Surge, Rough Idle,
Exhaust Odor
J1-32
Battery
440
ORN
B+
B+
None
No Start
See Page 5G-6 For NOTES
Index