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HOMESERVICE MANUALSCADILLAC2005CTS VREPAIR AND DIAGNOSISQUICK LOOKUPSWIRING DIAGRAMSOEM CONNECTOR END VIEWSCONNECTOR END VIEWSTRANSMISSION CONTROL MODULE CONNECTOR END VIEW
2005 Cadillac CTS V

Transmission Control Module Connector End View

2005 Cadillac CTS VSECTION Transmission Control Module Connector End View
Transmission Control Module Connector End View

GM821223Courtesy of GENERAL MOTORS CORP.
Connector Part Information Conn 42F Module 1 Socket Housing
Pin Wire Color Circuit No. Function
1 YE 400 OSS High Signal
2 PU 401 OSS Low Signal
3 OG/BK 1228 PC Solenoid Valve High Control (HSD1)
4 BN 418 TCC PWM Solenoid Valve Control
5 YE 343 Accessory Voltage
6 BK/WH 751 Ground
7 - - Not Used
8 OG 1525 Solenoid Power Supply (HSD2)
9 PK 239 Ignition Voltage
10 OG/BK 1230 ISS High Signal
11 D-BU
/WH		 1231 ISS Low Signal
12-14 - - Not Used
15 YE/BK 1227 TFT Sensor Signal
16-17 - - Not Used
18 YE/BK 1223 2-3 Shift Solenoid Valve Control
19 PU 898 4-5 Shift Solenoid Valve Control
20 WH 2500 High Speed GMLAN Serial Data Bus (+)
21 L-GN 2501 High Speed GMLAN Serial Data Bus (-)
22-23 - - Not Used
24 YE 772 Transmission Range Switch Signal B
25 GY 773 Transmission Range Switch Signal C
26 TN 2762 TFT Sensor Low Reference
27 RD/WH 1440 Battery Positive Voltage
28 - - Not Used
29 L-BU
/WH		 1229 PC Solenoid Valve Low Control
30 L-GN 1222 1-2 Shift Solenoid Valve Control
31 - - Not Used
32 WH 2500 High Speed GMLAN Serial Data Bus + (CAN)
33 GN 2501 High Speed GMLAN Serial Data Bus - (CAN)
34-35 - - Not Used
36 TN/WH 771 Transmission Range Switch Signal A
37 WH 776 Transmission Range Switch Signal P
38 OG 5371 BAS Relay Coil Supply Voltage
39-42 - - Not Used
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.