Engine Electrical Components. Isuzu S/T Isuzu

GM Service Manual Online

For 1990-2009 cars only

Makes 🢒 Isuzu 🢒 1998 🢒 S/T Isuzu - 2WD 🢒 Engine 🢒 Engine Electrical 🢒 Engine Electrical Components

Name

Location

Locator View

Connector End View

Battery (2.2L Engine)

RH front of engine compartment

Figure 7: Battery Location View


(1)	Radiator Support
(2)	Battery (2.2L Engine shown, 4.3L Engine similar)

in Starter and Charging Component Views in Engine Electrical in Engine

Battery (4.3L Engine)

RH front of engine compartment

Figure 7: Battery Location View


(1)	Radiator Support
(2)	Battery (2.2L Engine shown, 4.3L Engine similar)

in Starter and Charging Component Views in Engine Electrical in Engine

Battery MegaFuse

Inside lower RH side of radiator support below the battery

CRANK Fuse (UBEC)

In the Underhood Bussed Electrical Center

Figure 6: UBEC Internal Location View


(1)	BTSI Fuse (10 A) (W/ A/T)
(2)	B/U LP Fuse (UBEC) (25 A)
(3)	Starter Relay (Mini Relay)
(4)	IGN B MaxiFuse (50 A)
(5)	IGN E Fuse (UBEC) (10 A)
(6)	RAP MaxiFuse (40 A)
(7)	OXYSEN Fuse (UBEC) (20 A)
(8)	IGN A MaxiFuse (UBEC) (40 A)
(9)	LR PRK (10 A)
(10)	PARKLP Fuse (20 A)
(11)	ATC Fuse (20 A)
(12)	HVAC Fuse (30 A)
(13)	TRCHMSL Fuse (10 A)
(14)	HAZLP Fuse (20 A)
(15)	VECHMSL Fuse (10 A)
(16)	Headlamp Grounding Relay (Micro Relay)
(17)	CRANK Fuse (10 A)
(18)	STOPLP Fuse (20 A)
(19)	TBC Fuse (10 A)
(20)	High Mounted Stop Lamp Relay (Micro Relay) (Pickup)
(21)	IGN C Fuse (15 A)
(22)	FOG LP Fuse (15 A)
(23)	Daytime Running Lights Relay Diode
(24)	A/C Fuse (10 A)
(25)	A/C Compressor Clutch Relay (Micro Relay)
(26)	Horn Relay (Micro Relay)
(27)	HORN Fuse (15 A)
(28)	Daytime Running Lights Relay (Micro Relay)
(29)	Fuel Pump Prime Connector
(30)	RT HDLP Fuse (10 A)
(31)	FR PRK Fuse (10 A)
(32)	LT TURN Fuse (Front) (10 A)
(33)	RT TURN Fuse (Front) (10 A)
(34)	Headlamp Power Relay (Micro Relay)
(35)	LT HDLP Fuse (10 A)
(36)	RR PRK Fuse (10 A)
(37)	VEH B/U Fuse (15 A)
(38)	ECM B Fuse (20 A)
(39)	RT TRN Fuse (Rear) (10 A)
(40)	LT TRN Fuse (Rear) (10 A)
(41)	ENG I Fuse (UBEC) (10 A)
(42)	ECM I Fuse (UBEC) (15 A)
(43)	INT BAT MaxiFuse (50 A)
(44)	ABS MaxiFuse (60 A)
(45)	Fuel Pump Relay (Micro Relay)

in Starter And Charging Component Views in Engine Electrical in Engine

Generator (2.2L Engine)

RH front of engine

Figure 4: 2.2L Engine RR Locator View


(1)	Generator
(2)	Grounds G102 and G103
(3)	Engine Oil Pressure Gauge Sensor
(4)	Evaporative Emission Canister Purge Solenoid Valve
(5)	Electronic Ignition Control Module Connector C1
(6)	Electronic Ignition Control Module Connector C2
(7)	Ground G105
(8)	Splice S152
(9)	Connector C111 (2.2L Engine Harness to Fuel Injection Harness)
(10)	Splice S106
(11)	Splice S129
(12)	Splice S128

in Starter and Charging Component Views in Engine Electrical in Engine

Electrical Diagnosis Connector End Views Page 202-6

Generator (4.3L Engine)

RH front of engine

Figure 2: 4.3L Engine Generator And Starter Locator View


(1)	Exhaust Gas Recirculation Valve
(2)	Generator
(3)	Crankshaft Position Sensor
(4)	Starter Motor
(5)	Starter Solenoid
(6)	Splice S100
(7)	Splice S101
(8)	Splice S102
(9)	Electronic Ignition Control Module
(10)	Ignition Coil
(11)	Ignition Coil Assembly

in Starter and Charging Component Views in Engine Electrical in Engine

Electrical Diagnosis Connector End Views Page 202-6

IGN A MaxiFuse (UBEC)

In the Underhood Bussed Electrical Center

Figure 6: UBEC Internal Location View


(1)	BTSI Fuse (10 A) (W/ A/T)
(2)	B/U LP Fuse (UBEC) (25 A)
(3)	Starter Relay (Mini Relay)
(4)	IGN B MaxiFuse (50 A)
(5)	IGN E Fuse (UBEC) (10 A)
(6)	RAP MaxiFuse (40 A)
(7)	OXYSEN Fuse (UBEC) (20 A)
(8)	IGN A MaxiFuse (UBEC) (40 A)
(9)	LR PRK (10 A)
(10)	PARKLP Fuse (20 A)
(11)	ATC Fuse (20 A)
(12)	HVAC Fuse (30 A)
(13)	TRCHMSL Fuse (10 A)
(14)	HAZLP Fuse (20 A)
(15)	VECHMSL Fuse (10 A)
(16)	Headlamp Grounding Relay (Micro Relay)
(17)	CRANK Fuse (10 A)
(18)	STOPLP Fuse (20 A)
(19)	TBC Fuse (10 A)
(20)	High Mounted Stop Lamp Relay (Micro Relay) (Pickup)
(21)	IGN C Fuse (15 A)
(22)	FOG LP Fuse (15 A)
(23)	Daytime Running Lights Relay Diode
(24)	A/C Fuse (10 A)
(25)	A/C Compressor Clutch Relay (Micro Relay)
(26)	Horn Relay (Micro Relay)
(27)	HORN Fuse (15 A)
(28)	Daytime Running Lights Relay (Micro Relay)
(29)	Fuel Pump Prime Connector
(30)	RT HDLP Fuse (10 A)
(31)	FR PRK Fuse (10 A)
(32)	LT TURN Fuse (Front) (10 A)
(33)	RT TURN Fuse (Front) (10 A)
(34)	Headlamp Power Relay (Micro Relay)
(35)	LT HDLP Fuse (10 A)
(36)	RR PRK Fuse (10 A)
(37)	VEH B/U Fuse (15 A)
(38)	ECM B Fuse (20 A)
(39)	RT TRN Fuse (Rear) (10 A)
(40)	LT TRN Fuse (Rear) (10 A)
(41)	ENG I Fuse (UBEC) (10 A)
(42)	ECM I Fuse (UBEC) (15 A)
(43)	INT BAT MaxiFuse (50 A)
(44)	ABS MaxiFuse (60 A)
(45)	Fuel Pump Relay (Micro Relay)

in Starter And Charging Component Views in Engine Electrical in Engine

IGN C Fuse (UBEC)

In the Underhood Bussed Electrical Center

Figure 6: UBEC Internal Location View


(1)	BTSI Fuse (10 A) (W/ A/T)
(2)	B/U LP Fuse (UBEC) (25 A)
(3)	Starter Relay (Mini Relay)
(4)	IGN B MaxiFuse (50 A)
(5)	IGN E Fuse (UBEC) (10 A)
(6)	RAP MaxiFuse (40 A)
(7)	OXYSEN Fuse (UBEC) (20 A)
(8)	IGN A MaxiFuse (UBEC) (40 A)
(9)	LR PRK (10 A)
(10)	PARKLP Fuse (20 A)
(11)	ATC Fuse (20 A)
(12)	HVAC Fuse (30 A)
(13)	TRCHMSL Fuse (10 A)
(14)	HAZLP Fuse (20 A)
(15)	VECHMSL Fuse (10 A)
(16)	Headlamp Grounding Relay (Micro Relay)
(17)	CRANK Fuse (10 A)
(18)	STOPLP Fuse (20 A)
(19)	TBC Fuse (10 A)
(20)	High Mounted Stop Lamp Relay (Micro Relay) (Pickup)
(21)	IGN C Fuse (15 A)
(22)	FOG LP Fuse (15 A)
(23)	Daytime Running Lights Relay Diode
(24)	A/C Fuse (10 A)
(25)	A/C Compressor Clutch Relay (Micro Relay)
(26)	Horn Relay (Micro Relay)
(27)	HORN Fuse (15 A)
(28)	Daytime Running Lights Relay (Micro Relay)
(29)	Fuel Pump Prime Connector
(30)	RT HDLP Fuse (10 A)
(31)	FR PRK Fuse (10 A)
(32)	LT TURN Fuse (Front) (10 A)
(33)	RT TURN Fuse (Front) (10 A)
(34)	Headlamp Power Relay (Micro Relay)
(35)	LT HDLP Fuse (10 A)
(36)	RR PRK Fuse (10 A)
(37)	VEH B/U Fuse (15 A)
(38)	ECM B Fuse (20 A)
(39)	RT TRN Fuse (Rear) (10 A)
(40)	LT TRN Fuse (Rear) (10 A)
(41)	ENG I Fuse (UBEC) (10 A)
(42)	ECM I Fuse (UBEC) (15 A)
(43)	INT BAT MaxiFuse (50 A)
(44)	ABS MaxiFuse (60 A)
(45)	Fuel Pump Relay (Micro Relay)

in Starter And Charging Component Views in Engine Electrical in Engine

Ignition Switch

On RH side of the steering column

Figure 10 in Electrical Component Location Views in Electrical Diagnosis

Instrument Cluster

In the IP ahead of the steering column

Electrical Diagnosis Connector End Views Page 202-10

IP Fuse Block

LH side of the IP near the left front side door jamb switch

Figure 8 in Electrical Component Location Views in Electrical Diagnosis

Manual Transmission Clutch Start Switch

On clutch pedal support bracket

Figure1: Floor Pedals Locator View


(1)	Dash panel
(2)	Stop Lamp Switch
(3)	Brake pedal
(4)	Manual Transmission Clutch Start Switch
(5)	Clutch Pedal

in Starter and Charging Component Views in Engine Electrical in Engine

Powertrain Control Module (PCM)

Right hand side of engine compartment

PCM Connectors


(1)	PCM
(2)	Connector C1 (Blue)
(3)	Connector C2 (Black)

in Engine Controls Component Views in Engine Controls - 2.2L in Engine

Powertrain Control Module (PCM) Connector C1 (80 Cavities)

Right hand side of engine compartment

PCM Connectors


(1)	PCM
(2)	Connector C1 (Blue)
(3)	Connector C2 (Black)

in Engine Controls Component Views in Engine Controls - 2.2L in Engine

Powertrain Control Module Connector End Views in Engine Controls - 2.2L in Engine

RDO BATT Fuse 19

In the IP Fuse Block

IP Fuse Block Details in Power Distribution in Electrical Diagnosis

Starter (2.2 L Engine)

Lower LH side of engine

2.2L Engine Right Side Front Locator View


(1)	Oxygen Sensor, Pre-Converter
(2)	Connector C118 (2.2L Engine Harness to Oxygen Sensor Extension Harness)
(3)	Starter Solenoid
(4)	Starter Motor

in Starter and Charging Component Views in Engine Electrical in Engine

Starter (4.3 L Engine)

Lower RH front of engine

Figure 2: 4.3L Engine Generator And Starter Locator View


(1)	Exhaust Gas Recirculation Valve
(2)	Generator
(3)	Crankshaft Position Sensor
(4)	Starter Motor
(5)	Starter Solenoid
(6)	Splice S100
(7)	Splice S101
(8)	Splice S102
(9)	Electronic Ignition Control Module
(10)	Ignition Coil
(11)	Ignition Coil Assembly

in Starter and Charging Component Views in Engine Electrical in Engine

Starter Relay

In the Underhood Bussed Electrical Center

Figure 6: UBEC Internal Location View


(1)	BTSI Fuse (10 A) (W/ A/T)
(2)	B/U LP Fuse (UBEC) (25 A)
(3)	Starter Relay (Mini Relay)
(4)	IGN B MaxiFuse (50 A)
(5)	IGN E Fuse (UBEC) (10 A)
(6)	RAP MaxiFuse (40 A)
(7)	OXYSEN Fuse (UBEC) (20 A)
(8)	IGN A MaxiFuse (UBEC) (40 A)
(9)	LR PRK (10 A)
(10)	PARKLP Fuse (20 A)
(11)	ATC Fuse (20 A)
(12)	HVAC Fuse (30 A)
(13)	TRCHMSL Fuse (10 A)
(14)	HAZLP Fuse (20 A)
(15)	VECHMSL Fuse (10 A)
(16)	Headlamp Grounding Relay (Micro Relay)
(17)	CRANK Fuse (10 A)
(18)	STOPLP Fuse (20 A)
(19)	TBC Fuse (10 A)
(20)	High Mounted Stop Lamp Relay (Micro Relay) (Pickup)
(21)	IGN C Fuse (15 A)
(22)	FOG LP Fuse (15 A)
(23)	Daytime Running Lights Relay Diode
(24)	A/C Fuse (10 A)
(25)	A/C Compressor Clutch Relay (Micro Relay)
(26)	Horn Relay (Micro Relay)
(27)	HORN Fuse (15 A)
(28)	Daytime Running Lights Relay (Micro Relay)
(29)	Fuel Pump Prime Connector
(30)	RT HDLP Fuse (10 A)
(31)	FR PRK Fuse (10 A)
(32)	LT TURN Fuse (Front) (10 A)
(33)	RT TURN Fuse (Front) (10 A)
(34)	Headlamp Power Relay (Micro Relay)
(35)	LT HDLP Fuse (10 A)
(36)	RR PRK Fuse (10 A)
(37)	VEH B/U Fuse (15 A)
(38)	ECM B Fuse (20 A)
(39)	RT TRN Fuse (Rear) (10 A)
(40)	LT TRN Fuse (Rear) (10 A)
(41)	ENG I Fuse (UBEC) (10 A)
(42)	ECM I Fuse (UBEC) (15 A)
(43)	INT BAT MaxiFuse (50 A)
(44)	ABS MaxiFuse (60 A)
(45)	Fuel Pump Relay (Micro Relay)

in Starter And Charging Component Views in Engine Electrical in Engine

Transfer Case Control Module (TCCM) (NP1)

Behind Center of Instrument Panel

Figure 5: Shift Control Module Locator View


(1)	Side cowl panel
(2)	Body harness to Connector C203
(3)	Grounds G203, G204, and G205
(4)	Transfer Case Control Module (S4WD)

in Transfer Case Component Views in Transfer Case in Driveline/ Axle

Electrical Diagnosis Connector End Views Page 202-12

Transmission Range Switch (Park/Neutral Position And Backup Lamp Switch)

LH side of transmission

Figure 3: Transmission Range Switch Locator View


(1)	Connector C104 (Engine Harness to Chassis Harness)
(2)	Transmission Range Switch Connector C2
(3)	Transmission Range Switch Connector C1
(4)	Connector C105 (4.3L Engine Harness to LH Front Heated Oxygen Sensor Harness)
(5)	Heated Oxygen Sensor, LH Front (Bank 1, Sensor 1) (4.3L Engine)

in Starter and Charging Component Views in Engine Electrical in Engine

Transmission Range Switch (Park/Neutral Position And Backup Lamp Switch) Connector C1

LH side of transmission

Figure 3: Transmission Range Switch Locator View


(1)	Connector C104 (Engine Harness to Chassis Harness)
(2)	Transmission Range Switch Connector C2
(3)	Transmission Range Switch Connector C1
(4)	Connector C105 (4.3L Engine Harness to LH Front Heated Oxygen Sensor Harness)
(5)	Heated Oxygen Sensor, LH Front (Bank 1, Sensor 1) (4.3L Engine)

in Starter and Charging Component Views in Engine Electrical in Engine

Underhood Bussed Electrical Center (UBEC)

Over left front fender well

Underhood Bussed Electrical Center (UBEC) Connector C1 (Body, 68 Cavities)

Below the Underhood Bussed Electrical Center

Underhood Bussed Electrical Center (UBEC) Connector C2 (2.2L Engine, 68 Cavities)

Below the Underhood Bussed Electrical Center

Underhood Bussed Electrical Center (UBEC) Connector C2 (4.3L Engine, 68 Cavities)

Below the Underhood Bussed Electrical Center

Vehicle Control Module (VCM) (4.3L Engine)

RH side of engine compartment

VCM


(1)	Vehicle Control Module (VCM)
(2)	Right Front Fender
(3)	VCM Connector (Blue)
(4)	VCM Connector (Clear)
(5)	VCM Connector Retainer
(6)	VCM Connector (Black)
(7)	VCM Connector (Red)
(8)	VCM Retainer

in Engine Controls Component Views in Engine Controls - 4.3L in Engine

Vehicle Control Module (VCM) (4.3L Engine) Connector C3 (32 Cavities)

RH side of engine compartment

VCM


(1)	Vehicle Control Module (VCM)
(2)	Right Front Fender
(3)	VCM Connector (Blue)
(4)	VCM Connector (Clear)
(5)	VCM Connector Retainer
(6)	VCM Connector (Black)
(7)	VCM Connector (Red)
(8)	VCM Retainer

in Engine Controls Component Views in Engine Controls - 4.3L in Engine

VCM Connector End Views in Engine Controls - 4.3L in Engine

Vehicle Control Module (VCM) (4.3L Engine) Connector C4 (24 Cavities)

RH side of engine compartment

VCM


(1)	Vehicle Control Module (VCM)
(2)	Right Front Fender
(3)	VCM Connector (Blue)
(4)	VCM Connector (Clear)
(5)	VCM Connector Retainer
(6)	VCM Connector (Black)
(7)	VCM Connector (Red)
(8)	VCM Retainer

in Engine Controls Component Views in Engine Controls - 4.3L in Engine

VCM Connector End Views in Engine Controls - 4.3L in Engine

C120 (2.2L Engine Harness to Body Harness) (5 Cavities)

RH engine compartment, near PCM

Electrical Diagnosis Connector End Views Page 202-25

C203 (Body Harness to IP Harness) (116 Cavities)

RH side of dash

Figure 9 in Electrical Component Location Views in Electrical Diagnosis

Electrical Diagnosis Connector End Views Page 202-26

C211 (Body Harness to Steering Column harness) (48 Cavities)

Front of dash area, near steering column

Figure 12 in Electrical Component Location Views in Electrical Diagnosis

Electrical Diagnosis Connector End Views Page 202-29

G102 (Circuit 350, 2.2L Engine Harness)

RH engine block, under generator

Figure 1 in Electrical Component Location Views in Electrical Diagnosis

G102 (Circuit 350, 4.3L Engine Harness)

LH rear of engine block

Figure 1 in Electrical Component Location Views in Electrical Diagnosis

G106 (Circuit 1550, Battery Negative Harness)

RH frame rail forward of RH front wheel

G107 (Circuit 750, Battery Negative Harness, 2.2L Engine)

RH front of engine block

G107 (Circuit 750, Battery Negative Harness, 4.3L Engine)

RH front of engine block

G108 (Circuit 250, Battery Negative Harness)

Inside RH of radiator support, next to the Battery MegaFuse

P100 (IP Bulkhead Pass-Through)

LH rear of engine compartment, on cowl

S153 (Circuit 2, Battery Positive Harness)

Battery positive harness, 16 cm from the Battery MegaFuse, Fusible Link)

SP201 (Data Link Connector Spice Pack, Body Harness)

LH side of dash panel, below IP Fuse Block