Powertrain Control Module (PCM) X2 (L26+NU6)

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Powertrain Control Module (PCM) X2 (L26+NU6) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.35 BN	1456	EGR Valve Position Signal
2	0.35 OG/BK	1061	UART Serial Data Secondary
3	0.35 TN	800	UART Serial Data Primary
4	0.35 BK/WH	845	Fuel Injector 5 Control
5	0.35 BK	1744	Fuel Injector 1 Control
6	0.35 YE/BK	846	Fuel Injector 6 Control
7	0.35 PK/BK	1746	Fuel Injector 3 Control
8	0.35 BK	2753	Low Reference
9	0.35 L-GN/BK	1745	Fuel Injector 2 Control
10	0.35 L-BU/BK	844	Fuel Injector 4 Control
11	0.35 TN/BK	424	IC Timing Signal
12	0.5 BK/WH	3112	HO2S Heater Low Control Sensor 1
13	0.35 RD	1676	EGR Solenoid High Control
14-15	-	-	Not Used
16	0.35 GY	435	EGR Solenoid Low Control
17	-	-	Not Used
18	0.35 L-GN	432	MAP Sensor Signal
19-25	-	-	Not Used
26	0.35 BK	630	Camshaft Position Signal
27	0.35 PU/WH	430	Low Resolution Engine Speed Signal
28	0.35 L-BU/BK	647	Medium Resolution Engine Speed Signal
29	0.35 BK	2761	Low Reference
30	0.35 OG/BK	469	Low Reference
31	0.35 BN	1174	Oil Level Switch Signal
32	-	-	Not Used
33	0.35 GY	2702	5-Volt Reference 1
34	0.35 GY	2704	5-Volt Reference 2
35	0.35 GY	474	5 Volt Reference 1
36	-	-	Not Used
37	0.35 RD/BK	453	Low Reference
38-40	-	-	Not Used
41	0.35 D-GN/WH	428	EVAP Canister Purge Solenoid Valve Control
42-44	-	-	Not Used
45	0.35 GY	23	Generator Field Duty Cycle Signal
46	0.35 D-BU	496	Knock Sensor 1 Signal
47	0.5 TN/WH	3111	HO2S Low Signal
48	0.5 PU/WH	3110	HO2S High Signal
49-52	-	-	Not Used
53	0.35 RD	225	Generator Turn On Signal
54	-	-	Not Used
55	0.35 YE	410	ECT Sensor Signal
56	-	-	Not Used
57	0.35 TN/BK	231	Oil Pressure Switch Signal
58	0.35 L-BU	1876	Knock Sensor 2 Signal
59	0.35 PK/BK	429	Air Solenoid Control
60	-	-	Not Used
61	0.35 WH	423	IC Timing Control
62-72	-	-	Not Used
73	2 BK/WH	451	Ground

Connector Part Information

OEM: 15460475
Service: 88953274
Description: 73-Way F Micro-Pack 64 Series (BK)

Terminal Part Information

Pins: 1-13, 16, 18, 26-31, 33-35, 37, 41, 45-48, 53, 55, 57, 58, 59, 61
Terminal/Tray: 15359541/4
Core/Insulation Crimp: M/M
Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Pins: 73
Terminal/Tray: 15304720/19
Core/Insulation Crimp: 4/5
Release Tool/Test Probe: 15315247/J-35616-4A (PU)