1999-02 LS1 PCM pinouts (Camaro, Firebird) Corvette similar
PCM connector (BLUE)
Pin
1
2
3
4
5-7
8
9-10
Wire Color
BLK
LT GRN
PNK/BLK
LT GRN/BLK
-GRA
Circuit
No.
451
1867
1746
1745
-596
--
--
11
LT BLU
12
DK BLU/WHT
13-16
--
Function
PCM Ground
12 Volt Reference- CKP Pin "C"
Fuel Injector 3 Control
Fuel Injector 2 Control
Not Used
5 Volt Reference TPS Pin "A"
Not Used
1876
1869
--
KS [2] Signal Rear Sensor Pin "B"
CKP Sensor Signal Pin "A"
Not Used
17
DK BLU
1225
Transmission Fluid Pressure Switch Signal B Pin "R"
18
19
RED
PNK
1226
439
Transmission Fluid Pressure Switch Signal C Pin "P"
Ignition 1 Voltage
20
21
22
23
24
25
26
27
28
29
30-31
32
33
34
35
36
37
38-39
40
41
42
43
44
ORN
YEL/BLK
-GRA
-TAN
TAN
340
1868
-720
-1671
1667
-TAN/WHT
TAN/WHT
-1669
1653
-GRA
PPL
ORN/BLK
-BLK
YEL/BLK
-BLK
-DK GRN
RED/BLK
LT BLU/BLK
-48
420
434
-1744
846
-451
-335
877
844
45
GRA
474
46
47
48
49-50
51
GRA
-GRA
-DK BLU
474
-416
-496
52
--
--
53
BLK
407
54
55
56
BLK
---
407
---
Battery Positive Voltage
Low Reference CKP Pin "B"
Not Used
Low Reference Fuel Level Sensor (Factory)
Not Used
HO2S Low Signal [Bank 2 Sensor 2]
HO2S Low Signal [Bank 2 Sensor 1]
Not Used
HO2S Low Signal [Bank 1 Sensor 2]
HO2S Low Signal [Bank 1 Sensor 1]
Not Used
CPP Switch Signal (Manual Trans.)
TCC Brake Switch Signal (Auto. Trans)
Neutral Safety Switch Signal
Not Used
Fuel Injector 1 Control
Fuel Injector 6 Control
Not Used
Ground
Not Used
Low Speed Cooling Fan Relay Control (Primary fan)
Fuel Injector 7 Control
Fuel Injector 4 Control
5 Volt Reference (A/C Refrigerant Pressure Sensor)
(Factory)
5 Volt Reference (Fuel Tank Pressure Sensor) (Factory)
Not Used
5 Volt Reference (MAP Sensor) Pin "C"
Not Used
KS [1] Signal Front sensor Pin "A"
Not Used
Low Reference (Transmission Temperature Sensor) Pin
"M"
Low Reference (MAP Sensor Ground) Pin "A"
Not Used
Not Used
57
ORN
58
DK GRN
59
-60
BLK
61
PNK/BLK
62-64
-PPL
65
PPL
66
67
-PPL/WHT
68
PPL/WHT
69
BRN
70
71-72
-73
BRN/WHT
YEL
74
75
-76
BLK/WHT
77
DK BLU/WHT
78
--
340
1049
-452
632
-1670
1666
-1668
1665
1174
-633
410
-845
878
--
79
GRA or WHT
587 or
687
80
BLK
407
Battery Positive Voltage
ECM/PCM/VCM Class 2 Serial Data
Not Used
Low Reference TPS Pin "B"
Low Reference (Camshaft Position Sensor) Pin "B"
Not Used
HO2S High Signal [Bank 2 Sensor 2]
HO2S High Signal [Bank 2 Sensor 1]
Not Used
HO2S High Signal [Bank 1 Sensor 2]
HO2S High Signal [Bank 1 Sensor 1]
Oil Level Switch Signal
Not Used
CMP Sensor Signal Pin "A"
ECT Sensor Signal Pin "B"
Not Used
Fuel Injector 5 Control
Fuel Injector 8 Control
Not Used
Skip Shift Solenoid Control (M/T) or 3-2 Shift Solenoid
Control (A/T) Pin "S"
Low Reference ECT Pin "A"
PCM connector (RED)
Pin
1
2
3
Wire Color
BLK
BRN
-PNK/BLK
Circuit No.
451
418
-429
5
6
7
8
9
10
11-12
13
14
15
16
-RED/BLK
-LT BLU/WHT
DK GRN/WHT
WHT
-WHT
RED/BLK
RED
--
-1228
-1229
465
121
-85
380
225
--
17
18
19
20
21
22-23
DK GRN/WHT
DK GRN
--
762
59
--
LT GRN/BLK
PPL/WHT
--
822
821
--
4
Function
Ground
TCC Solenoid - Output - PWM Pin "U"
Not Used
Air Injection Reaction Solenoid Relay - Coil Control
Not Used
PC Solenoid Valve High Control (Sol.A) Pin "C"
Not Used
PC Solenoid Valve Low Control (Sol.A) Pin "D"
Fuel Pump Relay Control [Primary]
Engine Speed Signal- Tachometer
Not Used
Cruise Control Engage Signal
A/C Refrigerant Pressure Sensor Signal
Generator Turn ON Signal
Not Used
A/C Request Signal
A/C Compressor Clutch Supply Voltage
Not Used
VSS Low Signal
VSS High Signal
Not Used
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
DK BLU
TAN
PPL
RED
LT BLU/WHT
DK GRN/WHT
DK BLU
YEL
LT GRN
DK BLU
417
472
2121
2127
2126
2124
229
492
432
473
DK GRN/WHT
-BRN
DK GRN
-RED
BLK
-TAN/BLK
DK GRN/WHT
LT GRN
WHT
BRN/WHT
YEL/BLK
LT GRN
-DK GRN/WHT
YEL/BLK
--
428
-436
83
-631
451
-422
459
1652
1310
419
1223
1222
-817
1227
--
TPS Sensor Signal Pin "C"
IAT Sensor Signal Pin "B"
IC 1 Control
IC 7 Control
IC 6 Control
IC 4 Control
Fuel Enable Control
MAF Sensor Signal Pin "A"
MAP Sensor Signal Pin "B"
High Speed Cooling Fan Relay Control
EVAP Canister Purge Solenoid Control
Not Used
AIR Pump Relay Control
Cruise Control Inhibit Signal
Not Used
12 Volt Reference CMP Pin "C"
Ground
Not Used
TCC Solenoid Valve Control Pin "T"
A/C Clutch Relay Control
Reverse Lock Out Solenoid Control
EVAP Canister Vent Solenoid Control
MIL Control
2 - 3 Shift Solenoid Valve Control Pin "B"
1 - 2 Shift Solenoid Valve Control Pin "A"
Not Used
VSS Signal
TFT Sensor Signal Pin "L"
Not Used
53
54
55-56
57
58-59
60
61
GRA/BLK
PPL
-PPL
-BRN
BRN/WHT
1687
1589
-719
-2129
2130
Ignition Retard Signal EBCM only (Factory)
Fuel Level Sensor Signal (Factory)
Not Used
Low Reference IAT Pin "A"
Not Used
Low Reference Ignition Coils bank 1 (1-3-5-7)
Low Reference Ignition Coils Bank 2 (2-4-6-8)
62
63
64
65
66
67
68
69
70-75
76
77
78
79
80
-PNK
-1224
DK GRN
-PPL/WHT
RED/WHT
DK GRN
LT BLU
-LT GRN/WHT
LT GRN/BLK
LT BLU/BLK
LT BLU/WHT
--
890
-2128
2122
2125
2123
-1749
444
1748
1747
--
Not Used
Transmission Fluid Pressure Switch Signal A Pin
"N"
Fuel Tank Pressure Sensor Signal (Factory)
Not Used
IC 8 Control
IC 2 Control
IC 5 Control
IC 3 Control
Not Used
IAC Coil B High Control Pin "B"
IAC Coil B Low Control Pin "A"
IAC Coil A Low Control Pin "C"
IAC Coil A High Control Pin "D"
Not Used