Engine Control Module (ECM) C (L34)
Courtesy of GENERAL MOTORS CORP. Engine Control Module (ECM) C Connector Terminal Identification (L34)
| Pin |
Wire |
Circuit |
Function |
| 1 |
0.5 BN/BK |
543 |
5-Volt Reference |
| 2 |
0.5 GY |
605 |
5-Volt Reference |
| 3 |
0.5 PU |
1550 |
Low Reference |
| 4 |
0.5 L-GN |
413 |
Low Reference |
| 5 |
0.5 PU/WH |
632 |
Low Reference |
| 6 |
0.5 BN |
488 |
5-Volt Reference |
| 7-8 |
- |
- |
Not Used |
| 9 |
0.5 L-BU |
1450 |
Low Reference |
| 10-11 |
- |
- |
Not Used |
| 12 |
0.5 PK/BK |
1846 |
Ignition 1 Voltage |
| 13 |
0.5 PK/BK |
1846 |
Ignition 1 Voltage |
| 14 |
- |
- |
Not Used |
| 15 |
0.5 BN/WH |
379 |
CPP Switch Signal (M/T) |
| 16 |
- |
- |
Not Used |
| 17 |
0.5 OG |
440 |
Battery Positive Voltage |
| 18 |
0.5 OG |
440 |
Battery Positive Voltage |
| 19 |
0.5 BK/WH |
51 |
Ground |
| 20 |
0.5 BK/WH |
51 |
Ground |
| 21 |
0.5 BK/WH |
51 |
Ground |
| 22 |
0.5 BK/WH |
51 |
Ground |
| 23-24 |
- |
- |
Not Used |
| 25 |
D-GN/WH |
762 |
A/C Request Signal |
| 26 |
L-BU |
20 |
Stop Lamp Switch Output |
| 27 |
- |
- |
Not Used |
| 28 |
BN |
17 |
Stop Lamp Switch Output |
| 29 |
0.5 WH |
791 |
APP Sensor 2 Signal |
| 30 |
L-BU |
380 |
A/C Pressure Sensor Signal |
| 31 |
0.5 PU |
2000 |
Serial Data |
| 32 |
- |
- |
Not Used |
| 33 |
0.5 PK/D-BU |
539 |
Ignition 1 Voltage |
| 34 |
0.5 BK/WH |
51 |
Ground |
| 35 |
D-GN |
67 |
A/C Clutch Relay Control |
| 36 |
0.5 BK |
441 |
Main Relay Control |
| 37 |
WH |
183 |
Cruise Indicator Control |
| 38 |
D-GN/WH |
817 |
Vehicle Speed Signal (M/T) |
| 39-40 |
- |
- |
Not Used |
| 41 |
0.5 GY |
121 |
Engine Speed Signal |
| 42 |
0.5 L-GN |
465 |
Fuel Pump Relay Control |
| 43 |
0.5 GY |
1936 |
Fuel Level Sensor Signal |
| 44 |
0.5 D-BU |
790 |
APP Sensor 1 Signal |
| 45 |
0.5 D-BU/WH |
397 |
Cruise Control Switch Signal |
| 46 |
0.5 PU |
1807 |
CAN Serial Data High |
| 47 |
0.5 YE/D-GN |
890 |
Fuel Tank Pressure Sensor Signal |
| 48 |
0.5 D-GN |
602 |
Rough Road Sensor Signal w/o ABS |
| 49 |
0.5 BN/WH |
419 |
MIL Control |
| 50 |
D-GN/WH |
355 |
Low Speed Cooling Fan Relay Control |
| 51-55 |
- |
- |
Not Used |
| 56 |
D-GN |
135 |
Engine Coolant Temperature Gauge Control |
| 57 |
0.5 BN/BK |
1671 |
Heated Oxygen Sensor (HO2S) 2 Heater Control |
| 58-60 |
- |
- |
Not Used |
| 61 |
0.5 WH |
30 |
Fuel Gauge Control |
| 62 |
0.5 PU |
1670 |
Heated Oxygen Sensor (HO2S) 2 Signal |
| 63 |
0.5 YE |
710 |
CAN Serial Data Low |
| 64 |
D-BU |
876 |
Rough Road Signal w/ABS |
Connector Part Information
- OEM: AMP 0-368434-1
- Description: 64-Way F ECU 64P Conn Assembly (32-bit-B) (BK)
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