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Home >> Cadillac >> 2006 >> STS Base, 4.6 A, RWD >> Repair and Diagnosis >> Quick Lookups >> Wiring Diagrams >> OEM Connector End Views - Keyless Entry, Automatic Level Control, Power Door Systems, Navigation System, Engine Electrical, Instrument Panel, Gages, And Console, Shift Lock Control, Sir, Automatic Transmission, Stationary Windows >> Automatic Transmission Related Connector End Views >> Transmission Control Module (TCM) Connector End View, Engine Side
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Transmission Control Module (TCM) Connector End View, Engine Side

Fig 1: TCM Engine Side Connector
GM821223Courtesy of GENERAL MOTORS CORP.
Automatic Transmission Related Connector End Views

Connector Part Information 
  • OEM: 88956573
  • Service: See Catalog
  • Description: 42-Way F Module 1 Socket Housing
Transmission Control Module (TCM), Engine Side

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
4 BN 418 TCC Solenoid Valve Control
5 YE/BK 5728 ECM/TCM Serial Data Wake Up
6 BK/WH 751 (5L40)
1551 (5L50)
Ground
7 - - Not Used
8 OG 1525 Solenoid Power Supply
9 PK 239 Ignition 1 Voltage
10 OG/BK 1230 ISS High Signal
11 D-BU
/WH
1231 ISS Low Signal
12-13 - - Not Used
14 PU 5526 Tap Up/Tap Down Signal
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 TN/BK 2500 High Speed GMLAN Serial Data Bus +
21 TN 2501 High Speed GMLAN Serial Data Bus -
22-23 - - Not Used
24 YE 772 Transmission Range Signal B
25 GY 773 Transmission Range Signal C
26 TN 2762 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 TN/BK 2500 High Speed GMLAN Serial Data Bus +
33 TN 2501 High Speed GMLAN Serial Data Bus -
34-35 - - Not Used
36 TN/WH 771 Transmission Range Signal A
37 WH 776 Transmission Range Signal P
38 WH 17 TCC Brake Switch Signal
39-42 - - Not Used