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HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 101 (ENGINE CONTROL SYSTEM - 3.8L - INTRODUCTION (2 OF 2))COMPONENT LOCATORPOWERTRAIN CONTROL MODULE (PCM) CONNECTOR END VIEWS

2006 Buick Terraza CXL, 3.5 L, AWD

Powertrain Control Module (PCM) Connector End Views

2006 Buick Terraza CXL, 3.5 L, AWDSECTION Powertrain Control Module (PCM) Connector End Views

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Powertrain Control Module (PCM) C1 (NU3)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		OEM: 15460473 Service: See Catalog 56-Way F Micro-Pack 64 Series (BU)
Pin	Wire Color	Circuit No.	Function
1-3	-	-	Not Used
4	GY	2700	5-Volt Reference
5	-	-	Not Used
6	BN/WH	419	MIL Control
7	BK	2751	Low Reference
8	BK	2759	Low Reference
9	-	-	Not Used
10	WH	1310	EVAP Canister Vent Solenoid Valve Control
11	-	-	Not Used
12	BK	476	Low Reference
13-14	-	-	Not Used
15	D-GN	1049	PCM Class 2 Serial Data
16-17	-	-	Not Used
18	BN	1141	Ignition 3 Voltage
19	PK	439	Ignition 1 Voltage
20	OG	540	Battery Positive Voltage
21	WH	121	Engine Speed Signal (JL9)
22	D-GN	389	Vehicle Speed Signal
23	YE/BK	625	Starter Enable Relay Control
24	BN	5069	Powertrain Relay Control
25	-	-	Not Used
26	D-GN	890	Fuel Tank Pressure Sensor Signal
27-30	-	-	Not Used
31	RD/BK	380	A/C Refrigerant Pressure Sensor Signal
32	WH	17	Stop Lamp Switch Signal
33	D-GN/WH	459	A/C Compressor Clutch Relay Control
34	BN	436	Air Pump Relay Control
35-36	-	-	Not Used
37	D-GN/WH	465	Fuel Pump Relay Control
38-42	-	-	Not Used
43	PU	1589	Fuel Level Sensor Signal
44	GY	1884	Cruise Control Set/Coast and Resume/Accelerate Switch Signal
45-47	-	-	Not Used
48	D-GN	335	Low Speed Cooling Fan Relay Control
49	-	-	Not Used
50	D-BU	473	High Speed Cooling Fan Relay Control
51-52	-	-	Not Used
53	GY	2709	5-Volt Reference
54-56	-	-	Not Used

Powertrain Control Module (PCM) C1 (W/O NU3)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		OEM: 15418488 Service: See Catalog 56-Way F Micro-Pack 64 Series (BU)
Pin	Wire Color	Circuit No.	Function
1-3	-	-	Not Used
4	GY	2700	5-Volt Reference
5	-	-	Not Used
6	BN/WH	419	MIL Control
7	BK	2751	Low Reference
8	BK	2759	Low Reference
9	-	-	Not Used
10	WH	1310	EVAP Canister Vent Solenoid Valve Control
11-14	-	-	Not Used
15	D-GN	1049	PCM Class 2 Serial Data
16-17	-	-	Not Used
18	BN	1141	Ignition 3 Voltage
19	PK	439	Ignition 1 Voltage
20	OG	540	Battery Positive Voltage
21	WH	121	Engine Speed Signal (JL9)
22	D-GN	389	Vehicle Speed Signal
23	YE/BK	625	Starter Enable Relay Control
24	BN	5069	Powertrain Relay Control
25	-	-	Not Used
26	D-GN	890	Fuel Tank Pressure Sensor Signal
27-30	-	-	Not Used
31	RD/BK	380	A/C Refrigerant Pressure Sensor Signal
32	WH	17	Stop Lamp Switch Signal
33	D-GN/WH	459	A/C Compressor Clutch Relay Control
34-36	-	-	Not Used
37	D-GN/WH	465	Fuel Pump Relay Control
38-42	-	-	Not Used
43	PU	1589	Fuel Level Sensor Signal
44	GY	1884	Cruise Control Set/Coast and Resume/Accelerate Switch Signal
45-47	-	-	Not Used
48	D-GN	335	Low Speed Cooling Fan Relay Control
49	-	-	Not Used
50	D-BU	473	High Speed Cooling Fan Relay Control
51-52	-	-	Not Used
53	GY	2709	5-Volt Reference
54-56	-	-	Not Used

Powertrain Control Module (PCM) C2 (NU3)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		OEM: 15460475 Service: See Catalog 73-Way F Micro-Pack 64 Series (BK)
Pin	Wire Color	Circuit No.	Function
1	BN	1456	EGR Valve Position Signal
2	OG/BK	1061	UART Serial Data Secondary
3	TN	800	UART Serial Data Primary
4	BK/WH	845	Fuel Injector 5 Control
5	BK	1744	Fuel Injector 1 Control
6	YE/BK	846	Fuel Injector 6 Control
7	PK/BK	1746	Fuel Injector 3 Control
8	BK	2753	Low Reference
9	L-GN/BK	1745	Fuel Injector 2 Control
10	L-BU/BK	844	Fuel Injector 4 Control
11	TN/BK	424	IC Timing Signal
12	BK/WH	3112	HO2S Heater Low Control Sensor 1
13	RD	1676	EGR Solenoid High Control
14-15	-	-	Not Used
16	GY	435	EGR Solenoid Low Control
17	-	-	Not Used
18	L-GN	432	MAP Sensor Signal
19-25	-	-	Not Used
26	BK	630	Camshaft Position Signal
27	PU/WH	430	Low Resolution Engine Speed Signal
28	L-BU/BK	647	Medium Resolution Engine Speed Signal
29	BK	2761	Low Reference
30	OG/BK	469	Low Reference
31	BN	1174	Oil Level Switch Signal
32	-	-	Not Used
33	GY	2702	5-Volt Reference
34	GY	2704	5-Volt Reference
35	GY	474	5 Volt Reference
36	-	-	Not Used
37	RD/BK	453	Low Reference
38-40	-	-	Not Used
41	D-GN/WH	428	EVAP Canister Purge Solenoid Valve Control
42-44	-	-	Not Used
45	GY	23	Generator Field Duty Cycle Signal
46	D-BU	496	Knock Sensor 1 Signal
47	TN/WH	3111	HO2S Low Signal
48	PU/WH	3110	HO2S High Signal
49-52	-	-	Not Used
53	RD	225	Generator Turn On Signal
54	-	-	Not Used
55	YE	410	ECT Sensor Signal
56	-	-	Not Used
57	TN/BK	231	Oil Pressure Switch Signal
58	L-BU	1876	Knock Sensor 2 Signal
59	PK/BK	429	Air Solenoid Control
60	-	-	Not Used
61	WH	423	IC Timing Control
62-72	-	-	Not Used
73	BK/WH	451	Ground

Powertrain Control Module (PCM) C2 (W/O NU3)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		OEM: 15462060 Service: See Catalog 73-Way F Micro-Pack 64 Series (BK)
Pin	Wire Color	Circuit No.	Function
1	BN	1456	EGR Valve Position Signal
2	OG/BK	1061	UART Serial Data Secondary
3	TN	800	UART Serial Data Primary
4	BK/WH	845	Fuel Injector 5 Control
5	BK	1744	Fuel Injector 1 Control
6	YE/BK	846	Fuel Injector 6 Control
7	PK/BK	1746	Fuel Injector 3 Control
8	BK	2753	Low Reference
9	L-GN/BK	1745	Fuel Injector 2 Control
10	L-BU/BK	844	Fuel Injector 4 Control
11	TN/BK	424	IC Timing Signal
12	BK/WH	3112	HO2S Heater Low Control Sensor 1
13	RD	1676	EGR Solenoid High Control
14-15	-	-	Not Used
16	GY	435	EGR Solenoid Low Control
17	-	-	Not Used
18	L-GN	432	MAP Sensor Signal
19-25	-	-	Not Used
26	BK	630	Camshaft Position Signal
27	PU/WH	430	Low Resolution Engine Speed Signal
28	L-BU/BK	647	Medium Resolution Engine Speed Signal
29	BK	2761	Low Reference
30	OG/BK	469	Low Reference
31	BN	1174	Oil Level Switch Signal
32	-	-	Not Used
33	GY	2702	5-Volt Reference
34	GY	2704	5-Volt Reference
35-36	-	-	Not Used
37	RD/BK	453	Low Reference
38-40	-	-	Not Used
41	D-GN/WH	428	EVAP Canister Purge Solenoid Valve Control
42-44	-	-	Not Used
45	GY	23	Generator Field Duty Cycle Signal
46	D-BU	496	Knock Sensor 1 Signal
47	TN/WH	3111	HO2S Low Signal
48	PU/WH	3110	HO2S High Signal
49-52	-	-	Not Used
53	RD	225	Generator Turn On Signal
54	-	-	Not Used
55	YE	410	ECT Sensor Signal
56	-	-	Not Used
57	TN/BK	231	Oil Pressure Switch Signal
58	L-BU	1876	Knock Sensor 2 Signal
59-60	-	-	Not Used
61	WH	423	IC Timing Control
62-72	-	-	Not Used
73	BK/WH	451	Ground

Powertrain Control Module (PCM) C3 (NU3)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		OEM: 15460474 Service: See Catalog 56-Way F Micro-Pack 64 Series (GY)
Pin	Wire Color	Circuit No.	Function
1-3	-	-	Not Used
4	TN/WH	3121	HO2S Low Signal
5	YE/BK	1227	TFT Sensor Signal
6	YE	492	MAF Sensor Signal
7	-	-	Not Used
8	BK/WH	3122	HO2S Heater Low Control - Sensor 2
9-10	-	-	Not Used
11	RD/BK	1230	AT ISS High Signal
12	YE	400	VSS High Signal
13-14	-	-	Not Used
15	GY	773	Transmission Range Switch Signal C
16-18	-	-	Not Used
19	PU	3120	HO2S High Signal
20-21	-	-	Not Used
22	YE	772	Transmission Range Switch Signal B
23	WH	776	Transmission Range Switch Signal P
24	WH	1804	TCC Release Switch Signal
25	-	-	Not Used
26	TN	472	IAT Sensor Signal
27-30	-	-	Not Used
31	WH	5268	Air Pressure Sensor
32	-	-	Not Used
33	L-GN	1222	1-2 Shift Solenoid Valve Control
34	BK/WH	771	Transmission Range Switch Signal A
35-38	-	-	Not Used
39	TN/BK	422	TCC Solenoid Valve Control
40-43	-	-	Not Used
44	PU	401	VSS Low Signal
45	-	-	Not Used
46	YE/BK	1223	2-3 Shift Solenoid Valve Control
47	RD/BK	1228	PC Solenoid Valve High Control (Sol. A)
48	BK	452	Low Reference
49	D-BU/WH	1231	AT ISS Low Signal
50	BK	2760	Low Reference
51	L-BU/WH	1229	PC Solenoid Valve Low Control (Sol. A)
52-56	-	-	Not Used

Powertrain Control Module (PCM) C3 (W/O NU3)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		OEM: 15418487 Service: See Catalog 56-Way F Micro-Pack 64 Series (GY)
Pin	Wire Color	Circuit No.	Function
1-3	-	-	Not Used
4	TN/WH	3121	HO2S Low Signal
5	YE/BK	1227	TFT Sensor Signal
6	YE	492	MAF Sensor Signal
7	-	-	Not Used
8	BK/WH	3122	HO2S Heater Low Control - Sensor 2
9-10	-	-	Not Used
11	RD/BK	1230	AT ISS High Signal
12	YE	400	VSS High Signal
13-14	-	-	Not Used
15	GY	773	Transmission Range Switch Signal C
16-18	-	-	Not Used
19	PU	3120	HO2S High Signal
20-21	-	-	Not Used
22	YE	772	Transmission Range Switch Signal B
23	WH	776	Transmission Range Switch Signal P
24	WH	1804	TCC Release Switch Signal
25	-	-	Not Used
26	TN	472	IAT Sensor Signal
27-32	-	-	Not Used
33	L-GN	1222	1-2 Shift Solenoid Valve Control
34	BK/WH	771	Transmission Range Switch Signal A
35-38	-	-	Not Used
39	TN/BK	422	TCC Solenoid Valve Control
40-43	-	-	Not Used
44	PU	401	VSS Low Signal
45	-	-	Not Used
46	YE/BK	1223	2-3 Shift Solenoid Valve Control
47	RD/BK	1228	PC Solenoid Valve High Control (Sol. A)
48	BK	452	Low Reference
49	D-BU/WH	1231	AT ISS Low Signal
50	BK	2760	Low Reference
51	L-BU/WH	1229	PC Solenoid Valve Low Control (Sol. A)
52-56	-	-	Not Used

RENDER: 1.0x

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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.