Came across another vehicle that uses an otherwise unused pin - 4WD Montana, Venture, and AWD Rendezvous use C1 pin 74 as a PWM output for the 4WD/AWD systems.


Blue 04 Venture 4wd
1 Low Reference
2 -
3 -
4 1-2 Shift Solenoid Valve Control
5 High Speed Cooling Fan Relay Control
6 LowSpeed Cooling Fan Relay Control
7 Camshaft Position Signal
8 Low Resolution Engine Speed Signal
9 Medium Resolution Engine Speed Signal
10 5 Volt Reference
11 -
12 HO2S Low Signal
13 Low Reference
14 -
15 -
16 Ground
17 Low Reference
18 -
19 Off/Run/Crank Voltage
20 Battery Positive Voltage
21 -
22 Trans Fluid Pressure Switch Signal A
23 -
24 -
25 -
26 -
27 -
28 HO2S Low Signal
29 Oxygen Sensor A Low
30 TCC Brake Switch/ Cruise Control Release Signal
31 Low Reference
32 EGR Solenoid Control
33 KS Signal
34 -
35 -
36 -
37 -
38 IAC Coil B High Control
39 -
40 -
41 -
42 -
43 Fuel Injector 1 Control
44 2-3 shift Solenoid Valve Control
45 Air Solenoid Control
46 Fuel Injector 3 Control
47 Fuel Injector 2 Control
48 Low Reference
49 -
50 -
51 -
52 -
53 IC Timing Signal
54 IC Timing Control
55 Vehicle Speed Signal
56 Ground
57 Ground
58 -
59 ECM/PCM/VCM Class 2 Serial Data
60 Ground
61 Low Reference
62 AT/ISS Low Signal
63 AT/ISS High Signal
64 VSS High Sigtnal
65 VSS Low Signal
66 -
67 -
68 Transaxle Range Switch Signal B
69 MAF Sensor Signal
70 -
71 Required Torque Signal
72 Cruise Control Inhibit Signal
73 Fuel Injector 5 Control
74 Axle Actuator Control
75 -
76 EVAP Canister Purge Solenoid Control
77 -
78 -
79 Fuel Injector 6 Control
80 Low Reference






clear 04 Venture 4wd
1 -
2 EVAP Canister Vent Valve Control
3 Fuel Pump Relay Control
4 EGR Valve Feed Control
5 MIL Control
6 -
7 IAC Coil A High
8 -
9 Delivered torque
10 HO2S Sensor 1 Signal High
11 HO2S Sensor 2 Signal High
12 -
13 -
14 -
15 -
16 Transaxle Range Switch Signal P
17 Trans Fluid Pressure Switch Signal C
18 Transaxle Range Switch Signal A
19 Oil Pressure Switch Signal
20 -
21 -
22 A/C Request Signal
23 Crank Voltage
24 Ignition 1 Voltage
25 MAP Sensor Signal
26 ECT Sensor Signal
27 A/C Refrigerant Pressure Sensor Signal
28 EGR Valve Position Signal
29 -
30 5 Volt Reference
31 -
32 -
33 5 Volt Reference
34 5 Volt Reference
35 Low Reference
36 -
37 HO2S Heater Low Control
38 -
39 A/C Compressor Clutch Relay Control
40 -
41 -
42 Fuel Injection 4 Control
43 -
44 IAC Valve A Low
45 PC Solenoid Valve High
46 PC Solenoid Valve Low
47 -
48 -
49 IAC Valve B Low Control
50 Intake Air Temperature Sensor
51 -
52 -
53 -
54 -
55 Fuel Tank Pressure Sensor Signal
56 Transaxle Range Switch Signal C
57 Trans Fluid Pressure Switch Signal B
58 Engine Oil Level Indicator Signal
59 Cruise Control Engaged Signal
60 -
61 Generator Turn On Signal
62 -
63 TCC Release Switch Signal
64 -
65 -
66 TP Sensor Signal
67 -
68 TFT Sensor Signal
69 Fuel Level Sensor Signal
70 12 Volt Reference
71 -
72 12 Volt Reference
73 Low Reference
74 Low Reference
75 Air Pump Relay Control
76 Starter Enable Relay Control
77 -
78 TCC PWM Solenoid Valve Control
79 -
80 Low Reference