Q74 Engine Coolant Bypass Valve (LSY)
WARNING: This page is about a different car, the 2023 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
 Courtesy of GENERAL MOTORS COMPANY
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Connector Part Information
- Harness Type: Engine Wiring Harness
- OEM Connector: 13522821
- Service Connector: 19371191
- Description: 5-Way F 1.2 MCON-LL Series, Sealed (NA)
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Terminal Part Information
| Terminal Type ID |
Terminated Lead |
Diagnostic Test Probe |
Terminal Removal Tool |
| I |
Not required |
J-35616-12 (BU) |
No Tool Required |
| Pin |
Size |
Color |
Circuit |
Function |
Terminal Type ID |
Option |
| 1 |
0.75 |
BU |
2976 |
Coolant Diverter Valve Actuator Control Open |
I |
LSY |
| 2 |
0.75 |
BU/BN |
2977 |
Coolant Diverter Valve Actuator Control Close |
I |
LSY |
| 3 |
0.5 |
WH/RD |
480 |
Engine Control Vehicle Sensors 5 Volt Reference 1 |
I |
LSY |
| 4 |
0.5 |
BU/GY |
2978 |
Coolant Diverter Valve Position Signal |
I |
LSY |
| 5 |
0.5 |
BK/GN |
580 |
Engine Control Sensors Low Reference 2 |
I |
LSY |