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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM - 5.3L - INTRODUCTION (2 OF 2)COMPONENT LOCATORENGINE CONTROLS CONNECTORS

2006 Isuzu Ascender S, 5.3 M, 4WD

Engine Controls Connectors

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Engine Controls Connectors

Accelerator Pedal Position (APP) Sensor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15326830 6-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	PU	1272	Low Reference
B	L-BU	1162	APP Sensor 2 Signal
C	TN	1274	5-Volt Reference
D	BN	1271	Low Reference
E	D-BU	1161	APP Sensor 1 Signal
F	WH/BK	1164	5-Volt Reference

Brake Booster Vacuum Sensor (DOD)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15448870 3-Way F 1.5 Sealed (GY)
Pin	Wire Color	Circuit No.	Function
1	D-BU	1809	Brake Booster Vacuum Sensor Signal
2	BK	452	Low Reference
3	GY	416	5-Volt Reference

Camshaft Position (CMP) Sensor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12059595 3-Way F Metri-Pack 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	RD	-	12-Volt Reference
B	PK/BK	-	Low Reference
C	BN/WH	-	CMP Sensor Signal

Crankshaft Position (CKP) Sensor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15324165 3-Way F Metri-Pack 150 Series Sealed (WH)
Pin	Wire Color	Circuit No.	Function
A	D-BU/WH	1869	CKP Sensor Signal
B	YE/BK	1868	Low Reference
C	L-GN	1867	12-Volt Reference

Engine Coolant Temperature (ECT) Sensor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15449028 2-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	2761	Low Reference
B	YE	410	ECT Sensor Signal

Evaporative Emission (EVAP) Canister Purge Solenoid

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12124037 2-Way F Metri-Pack 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	PK	239	Ignition 1 Voltage
B	D-GN/WH	428	EVAP Canister Purge Solenoid Control

Evaporative Emission (EVAP) Canister Vent Solenoid

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12052643 2-Way F Metri-Pack 150 Series Sealed (RD)
Pin	Wire Color	Circuit No.	Function
A	OG	540	Battery Positive Voltage
B	WH	1310	EVAP Canister Vent Solenoid Control

Fuel Injector 1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15419715 2-Way F GT 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	PK	1239	Ignition 1 Voltage
B	BK	1744	Fuel Injector 1 Control

Fuel Injector 2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15419715 2-Way F GT 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	PK	1339	Ignition 1 Voltage
B	L-GN/BK	1745	Fuel Injector 2 Control

Fuel Injector 3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15419715 2-Way F GT 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	PK	1239	Ignition 1 Voltage
B	PK/BK	1746	Fuel Injector 3 Control

Fuel Injector 4

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15419715 2-Way F GT 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	PK	1339	Ignition 1 Voltage
B	L-BU/BK	844	Fuel Injector 4 Control

Fuel Injector 5

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15419715 2-Way F GT 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	PK	1239	Ignition 1 Voltage
B	BK/WH	845	Fuel Injector 5 Control

Fuel Injector 6

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15419715 2-Way F GT 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	PK	1339	Ignition 1 Voltage
B	YE/BK	846	Fuel Injector 6 Control

Fuel Injector 7

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15419715 2-Way F GT 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	PK	1239	Ignition 1 Voltage
B	RD/BK	877	Fuel Injector 7 Control

Fuel Injector 8

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15419715 2-Way F GT 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	PK	1339	Ignition 1 Voltage
B	D-BU/WH	878	Fuel Injector 8 Control

Fuel Pump and Sender Assembly

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15324862 4-Way F APEX 2.8 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
1	BK	2450	Ground
2	PU	1589	Fuel Level Sensor Signal
3	BK	2759	Low Reference
4	GY	120	Fuel Pump Supply Voltage

Fuel Tank Pressure (FTP) Sensor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12059595 3-Way F Metri-Pack 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	2759	Low Reference
B	D-GN	890	Fuel Tank Pressure Sensor Signal
C	GY	2709	5-Volt Reference

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12176897 4-Way F Metri-Pack 150 Series Sealed (L-GY)
Pin	Wire Color	Circuit No.	Function
A	TN	1664	HO2S Low Signal - Bank 1 Sensor 1
B	PU/WH	1665	HO2S High Signal - Bank 1 Sensor 1
C	BK/WH	3113	HO2S Heater Low Control - Bank 1 Sensor 1
D	PK	1539	Ignition 1 Voltage

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15326423 4-Way M Metri-Pack 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	TN/WH	1669	HO2S Low Signal - Bank 1 Sensor 2
B	PU/WH	1668	HO2S High Signal - Bank 1 Sensor 2
C	BN	2391	HO2S Heater Low Control - Bank 1 Sensor 2
D	PK	539	Ignition 1 Voltage

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12176897 4-Way F Metri-Pack 150 Series Sealed (L-GY)
Pin	Wire Color	Circuit No.	Function
A	TN	1667	HO2S Low Signal - Bank 2 Sensor 1
B	PU	1666	HO2S High Signal - Bank 2 Sensor 1
C	L-GN	3212	HO2S Heater Low Control - Bank 2 Sensor 1
D	PK	1539	Ignition 1 Voltage

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15326423 4-Way M Metri-Pack 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	TN	1671	HO2S Low Signal - Bank 2 Sensor 2
B	PU	1670	HO2S High Signal - Bank 2 Sensor 2
C	RD/WH	3223	HO2S Heater Low Control - Bank 2 Sensor 2
D	PK	539	Ignition 1 Voltage

Ignition Coil 1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15439568 4-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	151	Ground
B	BN	2129	Low Reference
C	PU	2121	IC 1 Control
D	PK	39	Ignition 1 Voltage

Ignition Coil 2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15439568 4-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	151	Ground
B	BN	2129	Low Reference
C	RD	2127	IC 2 Control
D	PK	39	Ignition 1 Voltage

Ignition Coil 3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15439568 4-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	151	Ground
B	BN	2129	Low Reference
C	L-BU	2123	IC 3 Control
D	PK	39	Ignition 1 Voltage

Ignition Coil 4

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15439568 4-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	151	Ground
B	BN	2129	Low Reference
C	D-GN	2125	IC 4 Control
D	PK	39	Ignition 1 Voltage

Ignition Coil 5

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15439568 4-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	151	Ground
B	BN	2129	Low Reference
C	D-GN	2125	IC 5 Control
D	PK	39	Ignition 1 Voltage

Ignition Coil 6

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15439568 4-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	151	Ground
B	BN	2129	Low Reference
C	L-BU	2123	IC 6 Control
D	PK	39	Ignition 1 Voltage

Ignition Coil 7

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15439568 4-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	151	Ground
B	BN	2129	Low Reference
C	RD	2127	IC 7 Control
D	PK	39	Ignition 1 Voltage

Ignition Coil 8

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15439568 4-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	151	Ground
B	BN	2129	Low Reference
C	PU	2121	IC 8 Control
D	PK	39	Ignition 1 Voltage

Knock Sensor (KS) 1 - Left

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15374222 2-Way F GT 150 Series Sealed (WH)
Pin	Wire Color	Circuit No.	Function
A	D-BU	496	Knock Sensor 1 Signal
B	GY	1716	Low Reference

Knock Sensor (KS) 2 - Right

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15374222 2-Way F GT 150 Series Sealed (WH)
Pin	Wire Color	Circuit No.	Function
A	L-BU	1876	Knock Sensor 2 Signal
B	GY	2303	Low Reference

Manifold Absolute Pressure (MAP) Sensor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12129946 3-Way F Metri-Pack 150 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
A	OG/BK	469	Low Reference
B	L-GN	432	MAP Sensor Signal
C	GY	2704	5-Volt Reference

Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15305555 5-Way GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	2760	Low Reference
B	TN	472	IAT Sensor Signal
C	BK	450	Ground
D	PK	239	Ignition 1 Voltage
E	YE	492	MAF Sensor Signal

Throttle Body

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15355297 6-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	BN	582	TAC Motor Control - 2
B	YE	581	TAC Motor Control - 1
C	BK/WH	1704	Low Reference
D	D-GN	485	TP Sensor 1 Signal
E	L-BU/BK	1688	5-Volt Reference
F	PU	486	TP Sensor 2 Signal

Valve Lifter Oil Manifold (VLOM) Assembly (DOD)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12186057 5-Way F Metri-Pack 150.2 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
A	OG	5494	Cylinder Shutoff Solenoid Control 4
B	GY	5493	Cylinder Shutoff Solenoid Control 3
C	D-BU	5491	Cylinder Shutoff Solenoid Control 1
D	L-GN	5492	Cylinder Shutoff Solenoid Control 2
E	PK	239	Ignition 1 Voltage

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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.