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Isuzu Trooper OBD 1 Manual Diagnostic Guide

isuzu troper manual diagnostic guide

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Isuzu Trooper OBD 1 Manual Diagnostic Guide

The first-generation Bighorn was available as a three- or five-door wagon with independent front suspension. In the Japanese market, the car was originally introduced as the “Isuzu Rodeo Bighorn”, but the “Rodeo” part of the name was soon dropped. Early engines included a 2.0-liter gasoline and a 73 PS (54 kW) 2.2-liter diesel, lightly powered even by early 1980s standards for the vehicle’s 3,700 lb (1,680 kg) empty weight. The four-wheel-drive system was engaged by operating a three-position shifter adjacent to the transmission shifter. Both Aisin manual-locking and Isuzu’s own auto-locking hubs were employed.

In 1986, Isuzu introduced the 4ZD1 four-cylinder 112 PS (82 kW; 110 hp) 2.3-liter petrol engine. Apart from higher power, changes to the previous engine included a Kevlar timing belt replacing the previous chain, and a larger two-barrel carburetor. This engine eventually proved somewhat problematic with a high incidence of burned valves due to poor coolant flow design of the overhead cam/valve head with mechanical lifters.[citation needed] A later head casting improvement by an Italian firm corrected this problem through improved coolant flow. Also available only for 1986 in the US was the 87 PS (64 kW) 2.2-liter C223T turbocharged diesel engine, using a Garrett turbocharger. It was not a popular option because of the low power generated, and furthermore is notorious for a weak bottom end, the connecting rods not originally designed for the increased thermal and mechanical stress of forced induction. Because of those problems, Isuzu changed the 4ZE1 for 1988 and used the standard 2.8-liter GM V6 for 1989 until their own new V6 engines could be manufactured.

In 1987, the rectangular headlights were introduced. For 1988, Isuzu introduced a 120 hp (89 kW) 2.6-liter (4ZE1) I-TEC fuel-injected engine for the US market. In 1989, an optional General Motors 2.8-liter pushrod V6 borrowed from the Chevrolet S-10 pickup was also available. Later first-generation models offered an optional four-speed automatic transmission. Models from 1988 to 1991 were equipped with live rear axles and four-wheel disc brakes.

Overseas model engines included the Isuzu C223 (2238 cc), C223T (a turbocharged version of the same) and in the late 80s naturally aspirated and turbocharged 2.8-liter 4JB1 diesel versions, all straight-four engines. The turbocharged 2.8-liter originally produced 95 PS (70 kW), not much more than the 87 PS (64 kW) of the considerably smaller C223T due to new stricter emissions standards. Later versions with intercoolers fitted offered as much as 115 PS (85 kW).[1]

In 1989 only, a short-wheelbase (90-inch) Isuzu Trooper was imported to the US market as the Trooper. All of these short wheelbase Troopers were equipped with 2.6-liter fuel-injected inline-four engines, 4.77:1 differential gears and 15×7-inch aluminium alloy “snowflake” pattern wheels. Automatic and manual transmissions were offered.

In Central America, Troopers were offered with removable roofs and a higher wheel clearance. Powertrain options included the Isuzu 2.8-liter turbo diesel.

The Trooper was also sold in Australia and New Zealand as the Holden Jackaroo, named after an Australian slang term for a young man working on a sheep or cattle station. The standard Trooper was also sold under the Isuzu nameplate in New Zealand only. In Indonesia, where it was locally assembled by Garmak Motors, it was sold as the Chevrolet Trooper. Around 1987 a two-wheel-drive version called the Chevrolet Stallion was developed there; it has the Trooper’s body on the chassis of a rear-wheel-drive Chevrolet LUV. It also has a rigid front axle instead of the Trooper’s independent design. There was also a locally developed SUV model of the Isuzu Pickups built in the early 1980s called the Holden Lincah and Holden Raider. While similar to a Trooper in many ways it was a simpler vehicle and has bodywork partially made of fibreglass.

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In 1988 SsangYong Motors start.

READING TROUBLE CODE INSTRUCTION

<div style="width: 100%;"><div style="width: 100%;background-color: #555555;font-weight: bold;color: #FFFFFF;" class="f1">Code Format Description</div><div style="width: 100%;"><div style="width: 1;background-color: #555555;" class="f1"></div><div style="width: 100%;"><div style="padding: 5px;"><div style="width: 100%;" class="f1">The fault code will be in one of the following Code Formats below.<div class="ind-f1"><span class="prefix">• </span>Each code is made up of two series of flashes.</div><div class="ind-f1"><span class="prefix">• </span>The first series indicates the 'tens' digit.</div><div class="ind-f1"><span class="prefix">• </span>The second series indicates the 'ones' digit.</div><div class="ind-f1"><span class="prefix">• </span>A long pause separates each code.</div><div class="ind-f1"><span class="prefix">• </span>A shorter pause separates the 'tens' and 'ones'.</div><div class="ind-f1"><span class="prefix">• </span>Upper Code Format Diagram shows code No. 32 in this format.</div>Or...<div class="ind-f1"><span class="prefix">• </span>Each code is made up of two series of flashes.</div><div class="ind-f1"><span class="prefix">• </span>The long flashes indicate the 'tens' digits.</div><div class="ind-f1"><span class="prefix">• </span>The short flashes indicate the 'ones' digits.</div><div class="ind-f1"><span class="prefix">• </span>A long pause separates each code.</div><div class="ind-f1"><span class="prefix">• </span>Lower Code Format Diagram shows code No. 12 in this format.</div><div class="ind-f1"><span class="prefix">• </span>*The first code "flashed out" is always code 12.</div><div class="ind-f1"><span class="prefix">• </span>*If Code 12 repeats at least 4 times in a row there are No Codes in memory.</div><div class="ind-f1"><span class="prefix">• </span>*Codes repeat 3 times each, then the next code repeats 3 times...</div></div></div></div></div></div>

PLEASE FOLLOW THE JUMPER SETTING ABOVE:

INSTRUCTION:

1. If possible run the engine to bring the oxygen sensor up to operating temperature then switch the engine off.
2. Connect the terminals using your own jumper wire, as shown in the diagram above.
3. Turn ignition ON, the Check Engine Light (CEL) should be flashing on your car dashboard

PLEASE FOLLOW THE JUMPER SETTING ABOVE: INSTRUCTION: 1. If possible run the engine to bring the oxygen sensor up to operating temperature then switch the engine off. 2. Connect the terminals using your own jumper wire, as shown in the diagram above. 3. Turn ignition ON, the Check Engine Light (CEL) should be flashing on your car dashboard.
4 Read codes as described in the Code Format Description below.
Code Format Diagram

4 Read codes as described in the Code Format Description below. Code Format Diagram 32 code

READING CODE INSTRUCTION
The fault code will be in one of the following Code Formats above.
• Each code is made up of two series of flashes.
• The first series indicates the ‘tens’ digit.
• The second series indicates the ‘ones’ digit.
• A long pause separates each code.
• A shorter pause separates the ‘tens’ and ‘ones’.
• Upper Code Format Diagram shows code No. 32 in this format.
OTHER INSTRUCTION
READING CODE INSTRUCTION The fault code will be in one of the following Code Formats above. • Each code is made up of two series of flashes. • The first series indicates the 'tens' digit. • The second series indicates the 'ones' digit. • A long pause separates each code. • A shorter pause separates the 'tens' and 'ones'. • Upper Code Format Diagram shows code No. 32 in this format. OTHER INSTRUCTION 12 code

• Each code is made up of two series of flashes.
• The long flashes indicate the ‘tens’ digits.
• The short flashes indicate the ‘ones‘ digits.
• A long pause separates each code.
• Lower Code Format Diagram shows code No. 12 in this format.

Please remember the pattern of codes.
• *The first code “flashed out” is always code 12.
• *If Code 12 repeats at least 4 times in a row there are No Codes in memory.
• *Codes repeat 3 times each, then the next code repeats 3 times…

 

ERASING CODE INSTRUCTION

  • Ensure ignition switched OFF.
  • Disconnect engine control module (ECM) harness multi-plugs for 30 seconds.
  • Reconnect multi-plugs.
  • Repeat checking procedure to ensure no data remains in ECM fault memory.
  • Engine control module (ECM) location:

LIST OF TROUBLE CODE

Flash code Fault location Probable cause
12 Normal condition
13 Heated oxygen sensor (H02S)- short/open circuit Wiring, H025/025
14 Engine coolant temperature (ECT) sensor Wiring, ECT sensor
21 Throttle position (TP) sensor – signal voltage Wiring, TP sensor, mechanical fault, ECM
23 Intake air temperature (IAT) sensor Wiring, IAT sensor
24 Vehicle speed sensor (VSS) – circuit Wiring, VSS, mechanical fault, ECM
32 Exhaust gas recirculation (EGR) system Wiring, EGR valve, mechanical fault, ECM
33 Manifold absolute pressure (MAP) sensor – signal Wiring, MAP sensor, mechanical fault, ECM
42 Ignition control signal Wiring, ignition control module (ICM), ECM
43 Knock sensor (KS) ‘ Wiring, KS, mechanical fault, ECM
44 Heated oxygen sensor (H02S)/oxygen -sensor (02S) – signal – mixture lean Wiring, H02S/02S, mechanical fault, fuel system, fuel pressure, ECM
45 Heated oxygen sensor (H02S)/oxygen sensor   (028) – signal – mixture rich Wiring, H02S/02S, mechanical fault, fuel system, fuel pressure, ECM
51 Engine control module (ECM) – memory Wiring, ECM

 

NOTE:

Codes being displayed will differ from model to model. Sometimes, there are more codes than shown above. If not on the list, please check your service manual or contact ATS.
To prevent replacing unnecessary parts, do not replace any part until you verify the circuit or sensor or contact ATS for assistance.

 

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