2004 ISUZU TF SERIES Workshop Manual

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Page 2225 of 4264

ISUZU TF SERIES 2004 Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-229
Step Action Value (s) Yes No
4
Check for poor/faulty connection at the injector or
ECM connector. If a poor/faulty connection is found,
repair a

Page 2226 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E-230 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
7
Using the DVM and check the injector power supply
circuit.
1. Ignition "On", engine "Off".
2. Disconnect the

Page 2227 of 4264

ISUZU TF SERIES 2004 Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-231
Step Action Value (s) Yes No

A35
Breaker Box

E-8

No.3 Cylinder

B4
Breaker Box

E-9

No.4 Cylinder

A34
Breaker Box

E-51

No.5 Cy

Page 2228 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E-232 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
E-61(B)
E-7

No.2 Cylinder

E-60(A)
E-8

No.3 Cylinder

E-61(B)
E-9

No.4 Cylinder

Page 2229 of 4264

ISUZU TF SERIES 2004 Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-233
Step Action Value (s) Yes No
10 Using the DVM and check the injector signal circuit.
1. Ignition "On", engine "Off".
2. Disconnect the injecto

Page 2230 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E-234 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DIAGNOSTIC TROUBLE CODE (DTC) P0336 (FLASH CODE 29) CRANKSHAFT
POSITION SENSOR CIRCUIT RANGE/PERFORMANCE (58X)
DIAGNOSTIC TROUBLE CODE (DTC) P0337 (FLA

Page 2231 of 4264

ISUZU TF SERIES 2004 Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-235
CIRCUIT DESCRIPTION
The CKP reference signal is produced by the crankshaft
position (CKP) sensor. During one crankshaft
revolution, crankshaft pulses wi

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-235
CIRCUIT DESCRIPTION
The CKP reference signal is produced by the crankshaft
position (CKP) sensor. During one crankshaft
revolution, crankshaft pulses will be produced. The
Engine Control Module (ECM) uses the CKP reference
signal to calculate engine RPM and crankshaft position.
The ECM constantly monitors the number of pulses on
the CKP reference circuit and compares them to the
number of camshaft position (CMP) signal pulses being
received. If the ECM receives an incorrect number o
f
pulses on the CKP reference circuit, DTC P0336 will
set.

DIAGNOSTIC AIDS
An intermittent may be caused by a poor connection,
rubbed–through wire insulation or a wire broken inside
the insulation. Check for:
Poor connection –Inspect the ECM harness and
connectors for improper mating, broken locks,
improperly formed or damaged terminals, and poo
r
terminal-to-wire connection.
Damaged harness – Inspect the wiring harness fo
r
damage.
Reviewing the Failure Records vehicle mileage since
the diagnostic test last failed may help determine ho
w
often the condition that caused the DTC to be set
occurs. This may assist in diagnosing the condition.

Diagnostic Trouble Code (DTC) P0336 (Flash Code 29) Crankshaft Position
Sensor Circuit Range/Performance (58X)
Diagnostic Trouble Code (DTC) P0337 (Flash Code 29) Crankshaft Position
Sensor Circuit No Signal (58X)

Step Action Value (s) Yes No
1
Was the "On-Board Diagnostic (OBD) System Check"
performed?
- Go to Step 2 Go to On Board
Diagnostic (OBD)
System Check
2
1. Connect the Tech 2.
2. Review and record the failure information.
3. Select "F0: Read DTC Infor By Priority" in "F0:
Diagnostic Trouble Code".
Is the DTC P0336 or P0337 stored as "Present
Failure"?
- Go to Step 3 Refer to
Diagnostic Aids
and Go to Step 3
3
1. Using the Tech2, ignition "On" and engine "Off".
2. Select "Clear DTC Information" with the Tech2 and
clear the DTC information.
3. Operate the vehicle and monitor the "F5: Failed
This Ignition" in "F2: DTC Information"
Was the DTC P0336 or P0337 stored in this ignition
cycle?
- Go to Step 4 Refer to
Diagnostic Aids
and Go to Step 4
4
Check any accessory parts which may cause electric
interference or magnetic interference.
Was the problem found?
- Remove the
accessory parts
and verify repair Go to Step 5
5
Attempt to start the engine.
Does the engine start and continue to "Run"?
- Go to Step 6 Go to Step 7

Page 2232 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E-236 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
6

Using the DVM and check the CKP sensor signal.
1. Ignition "On", engine "On".
2. Measure the CKP output vol

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