PCM Gurus help......
09-07-2005, 07:33 PM
#1
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PCM Gurus help...... Ok I have a basically worthless AFR (christmas light) gauge. I want to hook it up just to check it out as they somewhat work @ WOT. I know its a purple or purple something wire from the PCM , There are many of them though. the car is a 98 (I know those pcms are different) so can anyone give me the PIN # of that wire off of the PCM so I can get the right one (my haynes manual got trashed)
thanks
thanks
09-08-2005, 09:11 AM
#3
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Offhand it looks like you want red connector pin 46
for signal and pin 5 for "ground" reference (if used).
Here is '98 PCM info I snarfed from LS1.com before
it all got trashed:
Circuit Number C1 (Red)
Pin
Wire Color
Function
1
Not Used
2
Not Used
3
WHT
EVAP Canister Vent Solenoid Valve
4
BRN/WHT
Camshaft Position Sensor
5
Not Used
6
Not Used
7
YEL
VSS Signal return
8
Not used
9
PNK/BLK
Injector #3 Control
10
Not Used
11
DK BLU
VTD Fuel Enable
12
LT BLU/BLK
Injector #4 Control
13
RED/WHT
Ignition #2 Control
14
DK GRN
A/C Status
15
BLK/WHT
Injector #5 Control
16
Not used
17
Not used
18
YEL/BLK
Injector #6 Control
19
Not used
20
Not used
21
PPL
IAT Sensor Ground
22
DK BLU
Transmission Range Signal B
23
LT GRN/BLK
Injector #2 Control
24
BLK/WHT
Sensor Ground Jumper
25
PNK
Transmission Range Signal A
26
Not used
27
RED/BLK
Injector #7 Control
28
Not used
29
Not used
30
GRY/BLK
Spark Retard Signal
31
DK BLU/WHT
Injector #8 Control
32
ORN/BLK
PNP Switch Signal
33
BLK
Injector #1 Control
34
GRY or WHT
Skip Shift Solenoid (M6), or 3-2 Shift Solenoid (A/T)
35
LT GRN
1-2 Shift Solenoid
36
DK BLU
Fuel Gauge Output Control
37
BRN/WHT
MIL Control
38
Not used
39
DK GRN/WHT
A/C Clutch Relay Control
40
WHT or YEL/BLK
Skip Shift Lamp Control (M/T) or 2-3 Shift Solenoid (A/T)
41
BRN/WHT
Low Oil Level Indicator Lamp Control
42
LT/GRN
Reverse Inhibit Solenoid Control
43
DK/GRN
Cooling Fan relay #1 Control
44
YEL
Crankshaft Position Sensor Input
45
DK GRN/WHT
EVAP Canister Purge Valve Control
46
Not Used
47
DK GRN/WHT
A/C Request Signal
48
YEL
MAF Signal
49
PPL
Ignition #1 Control
50
Not Used
51
Not Used
52
PPL/WHT
Ignition #8 Control
53
RED
Ignition #7 Control
54
LT BLU/WHT
Ignition #6 Control
55
DK GRN/WHT
VSS Output Signal
56
DK GRN
Ignition #5 Control
57
DK GRN/WHT
Ignition #4 Control
58
LT BLU
Ignition #3 Control
59
BRN/WHT
Ignition Control Reference Low Bank 2
60
BRN
Ignition Control Reference Low Bank 1
61
RED
Transmission Range Signal C
62
BLK
EGR Pintle Position Ground
63
BLK
A/C Refrigerant Pressure Sensor Ground
64
Not used
65
Not used
66
Not used
67
Not used
68
Not used
69
Not used
70
Not used
71
PPL
VSS Signal Low
72
BLK
PCM Ground
73
Not used
74
Not used
75
GRY
Left and Right Fuel Tank Sensor Ground
76
BLK
PCM Ground
77
PPL
TCC/Brake Switch Signal
78
Not used
79
Not used
80
Not used
Circuit Number C2 (Blue)
Pin
Wire Color
Function
1
TAN
HO2S Signal Low Bank 2 Sensor 2
2
TAN/WHT
HO2S Signal Low Bank 1 Sensor 2
3
TAN
Serial Data (UART)
4
RED
Camshaft Position Sensor B+ Supply
5
TAN
HO2S Signal Low Bank 2 Sensor 1
6
TAN/WHT
HO2S Signal Low Bank 1 Sensor 1
7
RED/BLK
A/C Refrigerant Pressure Sensor Signal
8
TAN
IAT Sensor Signal
9
BRN
EGR Pintle Position Sensor Signal
10
PPL
Fuel Level Sensor Signal
11
Not used
12
DK BLU
TP Sensor Signal
13
YEL/BLK
Transmission Fluid Temperature Signal
14
ORN/BLK
Transmission Fluid Temperature Ground
15
Not used
16
Not used
17
Not used
18
Not used
19
PNK
PCM Ignition 1 Feed
20
ORN
PCM Battery Feed
21
BLK
PCM Ground
22
YEL/BLK
Crankshaft Position Sensor Ground
23
BLK
TP sensor Ground
24
BLK/WHT
Sensor Ground Jumper
25
BRN
ECT Sensor Ground
26
ORN/BLK
MAP Sensor Ground
27
Not used
28
DRK BLU
Engine Cooling Fan Relay #2 and #3 Control
29
Not used
30
BRN
AIR Pump Relay Control
31
PPL
AIR Solenoid Relay Control
32
TAN/BLK
TCC Enable Control
33
BRN
TCC (PWM) Solenoid Valve Control
34
GRY
EGR Valve Ground
35
WHT
Engine Speed 9TACH)) Output Signal
36
LT BLU/WHT
Transmission Fluid Pressure Control Solenoid Control Low
37
DK GRN/WHT
Fuel Pump relay Control
38
LT BLU
EGR Valve Control Circuit
39
RED/BLK
Transmission Fluid Pressure Control Solenoid Control High
40
Not Used
41
PPL
HO2S Signal High Bank 2 Sensor 2
42
PPL/WHT
HO2S Signal High Bank 1 Sensor 2
43
GRY
TP Sensor 5V Reference
44
45
46
PPL
HO2S Signal High Bank 2 Sensor 1
47
PPL/WHT
HO2S Signal High Bank 1 Sensor 1
48
LT GRN
MAP Sensor Signal
49
YEL
ECT Sensor Signal
50
Not Used
51
Not Used
52
DK GRN
Fuel Tank Pressure Sensor Signal
53
Not Used
54
LT GRN/BLK
IAC Coil B Low
55
LT BLU/BLK
IAC Coil A Low
56
LT BLU/WHT
IAC Coil A High
57
LT GRN/WHT
IAC Coil B High
58
PPL
Serial Data (Class 2)
59
Not Used
60
BLK
PCM Ground
61
ORN
PCM Battery Feed
62
LT GRN
Crankshaft Position Sensor B+ Supply
63
Not used
64
GRY
MAP Sensor 5.0 Volt Reference
65
GRY
5V Reference
66
GRY
A/C Refrigerant Pressure Sensor 5.0 Volt Reference
67
GRY
5V Reference
68
LT BLU
Knock Sensor (KS) Rear
69
DK BLU
Knock Sensor (KS) Front
70
PNK/BLK
Camshaft Position Sensor ground
71
Not used
72
Not used
73
Not used
74
Not used
75
Not used
76
BRN
Oil Level Sensor Signal
77
Not used
78
Not used
79
Not used
80
Not used
for signal and pin 5 for "ground" reference (if used).
Here is '98 PCM info I snarfed from LS1.com before
it all got trashed:
Circuit Number C1 (Red)
Pin
Wire Color
Function
1
Not Used
2
Not Used
3
WHT
EVAP Canister Vent Solenoid Valve
4
BRN/WHT
Camshaft Position Sensor
5
Not Used
6
Not Used
7
YEL
VSS Signal return
8
Not used
9
PNK/BLK
Injector #3 Control
10
Not Used
11
DK BLU
VTD Fuel Enable
12
LT BLU/BLK
Injector #4 Control
13
RED/WHT
Ignition #2 Control
14
DK GRN
A/C Status
15
BLK/WHT
Injector #5 Control
16
Not used
17
Not used
18
YEL/BLK
Injector #6 Control
19
Not used
20
Not used
21
PPL
IAT Sensor Ground
22
DK BLU
Transmission Range Signal B
23
LT GRN/BLK
Injector #2 Control
24
BLK/WHT
Sensor Ground Jumper
25
PNK
Transmission Range Signal A
26
Not used
27
RED/BLK
Injector #7 Control
28
Not used
29
Not used
30
GRY/BLK
Spark Retard Signal
31
DK BLU/WHT
Injector #8 Control
32
ORN/BLK
PNP Switch Signal
33
BLK
Injector #1 Control
34
GRY or WHT
Skip Shift Solenoid (M6), or 3-2 Shift Solenoid (A/T)
35
LT GRN
1-2 Shift Solenoid
36
DK BLU
Fuel Gauge Output Control
37
BRN/WHT
MIL Control
38
Not used
39
DK GRN/WHT
A/C Clutch Relay Control
40
WHT or YEL/BLK
Skip Shift Lamp Control (M/T) or 2-3 Shift Solenoid (A/T)
41
BRN/WHT
Low Oil Level Indicator Lamp Control
42
LT/GRN
Reverse Inhibit Solenoid Control
43
DK/GRN
Cooling Fan relay #1 Control
44
YEL
Crankshaft Position Sensor Input
45
DK GRN/WHT
EVAP Canister Purge Valve Control
46
Not Used
47
DK GRN/WHT
A/C Request Signal
48
YEL
MAF Signal
49
PPL
Ignition #1 Control
50
Not Used
51
Not Used
52
PPL/WHT
Ignition #8 Control
53
RED
Ignition #7 Control
54
LT BLU/WHT
Ignition #6 Control
55
DK GRN/WHT
VSS Output Signal
56
DK GRN
Ignition #5 Control
57
DK GRN/WHT
Ignition #4 Control
58
LT BLU
Ignition #3 Control
59
BRN/WHT
Ignition Control Reference Low Bank 2
60
BRN
Ignition Control Reference Low Bank 1
61
RED
Transmission Range Signal C
62
BLK
EGR Pintle Position Ground
63
BLK
A/C Refrigerant Pressure Sensor Ground
64
Not used
65
Not used
66
Not used
67
Not used
68
Not used
69
Not used
70
Not used
71
PPL
VSS Signal Low
72
BLK
PCM Ground
73
Not used
74
Not used
75
GRY
Left and Right Fuel Tank Sensor Ground
76
BLK
PCM Ground
77
PPL
TCC/Brake Switch Signal
78
Not used
79
Not used
80
Not used
Circuit Number C2 (Blue)
Pin
Wire Color
Function
1
TAN
HO2S Signal Low Bank 2 Sensor 2
2
TAN/WHT
HO2S Signal Low Bank 1 Sensor 2
3
TAN
Serial Data (UART)
4
RED
Camshaft Position Sensor B+ Supply
5
TAN
HO2S Signal Low Bank 2 Sensor 1
6
TAN/WHT
HO2S Signal Low Bank 1 Sensor 1
7
RED/BLK
A/C Refrigerant Pressure Sensor Signal
8
TAN
IAT Sensor Signal
9
BRN
EGR Pintle Position Sensor Signal
10
PPL
Fuel Level Sensor Signal
11
Not used
12
DK BLU
TP Sensor Signal
13
YEL/BLK
Transmission Fluid Temperature Signal
14
ORN/BLK
Transmission Fluid Temperature Ground
15
Not used
16
Not used
17
Not used
18
Not used
19
PNK
PCM Ignition 1 Feed
20
ORN
PCM Battery Feed
21
BLK
PCM Ground
22
YEL/BLK
Crankshaft Position Sensor Ground
23
BLK
TP sensor Ground
24
BLK/WHT
Sensor Ground Jumper
25
BRN
ECT Sensor Ground
26
ORN/BLK
MAP Sensor Ground
27
Not used
28
DRK BLU
Engine Cooling Fan Relay #2 and #3 Control
29
Not used
30
BRN
AIR Pump Relay Control
31
PPL
AIR Solenoid Relay Control
32
TAN/BLK
TCC Enable Control
33
BRN
TCC (PWM) Solenoid Valve Control
34
GRY
EGR Valve Ground
35
WHT
Engine Speed 9TACH)) Output Signal
36
LT BLU/WHT
Transmission Fluid Pressure Control Solenoid Control Low
37
DK GRN/WHT
Fuel Pump relay Control
38
LT BLU
EGR Valve Control Circuit
39
RED/BLK
Transmission Fluid Pressure Control Solenoid Control High
40
Not Used
41
PPL
HO2S Signal High Bank 2 Sensor 2
42
PPL/WHT
HO2S Signal High Bank 1 Sensor 2
43
GRY
TP Sensor 5V Reference
44
45
46
PPL
HO2S Signal High Bank 2 Sensor 1
47
PPL/WHT
HO2S Signal High Bank 1 Sensor 1
48
LT GRN
MAP Sensor Signal
49
YEL
ECT Sensor Signal
50
Not Used
51
Not Used
52
DK GRN
Fuel Tank Pressure Sensor Signal
53
Not Used
54
LT GRN/BLK
IAC Coil B Low
55
LT BLU/BLK
IAC Coil A Low
56
LT BLU/WHT
IAC Coil A High
57
LT GRN/WHT
IAC Coil B High
58
PPL
Serial Data (Class 2)
59
Not Used
60
BLK
PCM Ground
61
ORN
PCM Battery Feed
62
LT GRN
Crankshaft Position Sensor B+ Supply
63
Not used
64
GRY
MAP Sensor 5.0 Volt Reference
65
GRY
5V Reference
66
GRY
A/C Refrigerant Pressure Sensor 5.0 Volt Reference
67
GRY
5V Reference
68
LT BLU
Knock Sensor (KS) Rear
69
DK BLU
Knock Sensor (KS) Front
70
PNK/BLK
Camshaft Position Sensor ground
71
Not used
72
Not used
73
Not used
74
Not used
75
Not used
76
BRN
Oil Level Sensor Signal
77
Not used
78
Not used
79
Not used
80
Not used
