2004 ISUZU TF SERIES Workshop Manual

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ISUZU TF SERIES 2004  Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–245
Diagnostic Trouble Code (DTC) P0500 (Symptom Code A) (Flash Code 24) 
Vehicle Speed Sensor Input Signal Frequency  Too High
Step Action Value(s) Ye

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ISUZU TF SERIES 2004  Workshop Manual 6E–246 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
7 Using the DVM and check the VSS signal.
1. Ignition “On”, vehicle “Run (lift up)”. 
2. Measure the VSS output voltage at sensor, TCM
(A/T

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ISUZU TF SERIES 2004  Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–247
13 Replace the ECM. 
Is the action complete? 
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System

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ISUZU TF SERIES 2004  Workshop Manual 6E –248 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0500 (Symptom Code B) (Flash Code 24)  
Vehicle Speed Sensor Incorrect Signal
Step Action Value(s) Yes No 
1Was the

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ISUZU TF SERIES 2004  Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E –249
7 Check for poor/faulty connection at the ECM and 
other connectors. If a poor/faulty connection is found,
repair the faulty terminal. 
Was the pr

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ISUZU TF SERIES 2004  Workshop Manual 6E –250 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
11 Replace the TCM.  
Is the action complete? 
IMPORTANT:   The replacement TCM must be 
programmed.   “SPS (Service Programming System) 
is nec

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ISUZU TF SERIES 2004  Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E –251
15 Using the DVM and check the VSS signal circuit. 
1. Ignition   “Off ”, engine  “Off ”.  
2. Disconnect the meter connector and ECM  con

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ISUZU TF SERIES 2004  Workshop Manual 6E–252 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
17 Is the ECM programmed with the latest software
release? 
If not, download the latest software to the ECM using
the “SPS (Service Programming S