2004 ISUZU TF SERIES Workshop Manual

Page 1649 of 4264

ISUZU TF SERIES 2004  Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–277
12 Is the ECM programmed with the latest software
release? 
If not, download the latest software to the ECM using
the “SPS (Service Programming S

Page 1650 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E–278 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0703 (Symptom Code B) (Flash Code 25) 
Brake Switch Circuit Malfunction
Step Action Value(s) Yes No
1Was the “On-B

Page 1651 of 4264

ISUZU TF SERIES 2004  Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–279
6 Using the DVM and check the brake switch 2 power
supply circuit. 
1. Ignition “On”, engine “Off”. 
2. Remove the brake switch connector f

Page 1652 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E–280 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
9 Repair the short to voltage circuit between the brake
switch 2 connector and ECM. 
Is the action complete?
—Verify repair—
10 Repair the open

Page 1653 of 4264

ISUZU TF SERIES 2004  Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–281
DIAGNOSTIC TROUBLE CODE (DTC) P0704 (SYMPTOM CODE 6) 
(FLASH CODE 57) CLUTCH SWITCH INPUT CIRCUIT MALFUNCTION
Condition for setting the DTC and act

Page 1654 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E–282 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0704 (Symptom Code 6) (Flash Code 57) 
Clutch Switch Input Circuit Malfunction
Step Action Value(s) Yes No
1Was the

Page 1655 of 4264

ISUZU TF SERIES 2004  Workshop Manual 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–283
6 Using the DVM and check the clutch switch power supply circuit.  
1. Ignition “On”, engine “Off”.  
2. Remove the clutch switch connector

Page 1656 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6E–284 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
9 Repair the short to voltage circuit between the clutch
switch connector and ECM. 
Is the action complete?
—Verify repair—
10 Repair the open