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Page 1139 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±22
ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 32-Way White Connector ± Row ªDº
(For except EXPORT and SOUTH AFRICA)
TS23345
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
D1Injector C

Page 1140 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±23 ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 32-Way White Connector ± Row ªDº
(For EXPORT and SOUTH AFRICA)
TS23345
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
D1Injector Cylinder

Page 1141 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±24
ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 32-Way Blue Connector ± Row ªEº
(For except EXPORT and SOUTH AFRICA)
TS23346
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
E1Transmissio

Page 1143 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±26
ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 32-Way Blue Connector ± Row ªEº
(For EXPORT and SOUTH AFRICA)
TS23346
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
E1Transmission Outpu

Page 1144 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±27 ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 32-Way Blue Connector ± Row ªFº
TS23346
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
F1Not UsedÐÐÐÐ
F2Transmission Range
Signal ªC�

Page 1199 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±82
ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
StepNo Ye s Value(s) Action
131. Remove any ignition coil and install a spark tester at
the spark plug end of the coil

6E±82
ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
StepNo Ye s Value(s) Action
131. Remove any ignition coil and install a spark tester at
the spark plug end of the coil.
2. Observe the tester while the engine is cranking.
Was a crisp, blue spark observed? Only one or two
sparks followed by no result is considered the same as
ªNo Spark.º
ÐGo to Step 15Go to Step 14
14Replace the ignition coil, and return to Step 13 to test
the remaining coils.
Is the action complete?
ÐVerify repairÐ
15Repeat Step 13 for each coil. Remove only one coil at a
time, and reinstall each coil on its spark plug after
testing, but do not refasten coils with screws at this
time.
After all coils have passed the spark test, does the
engine start?
Ð
Refasten all
coils with
their screws
Go to Step 16
161. Remove the spark plugs from all cylinders.
2. Visually inspect the spark plug electrodes.
3. Replace any spark plugs with loose or missing
electrodes or cracked insulators.
Did your inspection reveal any spark plugs exhibiting
excessive fouling?
Ð
Correct the
fouling
condition
Go to Step 17
17Refer to Engine Mechanical Diagnosis to diagnose the
following conditions:
Faulty or incorrect camshaft drive belts
Leaking or sticky valves or rings
Excessive valve deposits
Loose or worn rocker arms
Weak valve springs
Incorrect valve timing
Leaking head gasket
Is the action complete?
ÐVerify repairGo to Step 19
18Observe the ªEngine Speedº data display on the scan
tool while cranking the engine.
Is the engine RPM indicated? (If the scan tool is
normally powered from the cigarette lighter socket, and
if the scan tool display goes blank while cranking the
engine, it will be necessary to power the scan tool
directly from the vehicle battery.)
ÐGo to Step 19Go to Step 28
191. Disconnect the 7-pin gray connector at the rear of
the air filter beneath the point where the air duct
attaches to the MAF sensor.
2. Ignition ªON.º
3. Using a test light connected to ground, probe the
ignition terminal at the PCM (female) side of the
7-pin connector.
Is the test light ªON?º
ÐGo to Step 20Go to Step 26

Page 1287 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±170
ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0201 Injector 1 Control Circuit
D06RW034
Circuit Description
The powertrain control module (PCM) has six individual
injector dr

6E±170
ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0201 Injector 1 Control Circuit
D06RW034
Circuit Description
The powertrain control module (PCM) has six individual
injector driver circuits. Each controls an injector. When a
driver circuit is grounded by the PCM, the injector is
activated. The PCM monitors the current in each driver
circuit. The voltage on each driver is monitored to detect
a fault. If the voltage is not what the PCM expects to
monitor on the circuit, a DTC is set. This DTC is also set if
an injector driver is shorted to voltage or if there is an open
circuit.
Conditions for Setting the DTC
The battery voltage is more than 9 volts.
The engine is turning, determined by 58X crankshaft
position input signal.
The injector voltage does not equal the ignition voltage
when the injector is commanded ªOFFº or the injector
voltage does not equal 0 volts when the injector is
commanded ªON.º
The above conditions are met for 15 seconds.
Action Taken When the DTC Sets
The PCM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
The PCM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Conditions for Clearing the MIL/DTC
DTC P0201 can be cleared by using the Tech 2 ªClear
Infoº function or by disconnecting the PCM battery
feed.
Diagnostic Aids
An injector driver circuit that is open or shorted to voltage
will cause a DTC P0201 to set. It will also cause a misfire
due to an inoperative injector. A misfire DTC will also be
set indicating which cylinder is inoperative.
Long term and short term fuel trims that are excessively
high or low are a good indication that an injector is faulty.
Use Fuel Injector Coil Test Procedure to check for faulty
injectors.
Test Description
The number(s) below refer to the step number(s) on the
Diagnostic Chart.
3. This step determines if DTC P0201 is the result of a
hard failure or an intermittent condition.
5. A special injector test connector is provided so that
the injectors can be electrically tested without
removal of the manifold. On the Trooper, the
special 7-way gray connector is located at the front
of the charcoal canister. The test connector can be
identified by the blue connector lock which is
tethered to the wiring harness. If the light for
cylinder 1 is ªONº steady before cranking the engine
as well as while cranking the engine, then the
injector driver circuit is shorted to ground.

Page 1289 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±172
ENGINE DRIVEABILITY AND EMISSIONS
DTC P0201 ± Injector 1 Control Circuit
StepNo Ye s Value(s) Action
71. Disconnect the PCM connector for the affected
injectors.
2. With a test ligh

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