2004 ISUZU TF SERIES Workshop Manual

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Page 2665 of 4264

ISUZU TF SERIES 2004 Workshop Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–89 Breaker Box Connection Type B Breaker box connection type B, check for “short to power supply circuit” and “power, signal voltage check” between the

Page 2666 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–90 ENGINE DRIVEABILITY AND EMISSIONS ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK Circuit Description The on-board diagnostic system check is the starting point for any driveability complaint diagnosis

Page 2667 of 4264

ISUZU TF SERIES 2004 Workshop Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–91 ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK Step Action Value(s) Yes No 1 1. Ignition “On”, engine “Off”. 2. Check the “CHECK ENGINE” lamp (MIL). Doe

Page 2668 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–92 ENGINE DRIVEABILITY AND EMISSIONS 9 Using the DVM and check the data link connector ground circuit. 1. Ignition “On”, engine “Off”. 2. Check the circuit for short to power supply circ

Page 2669 of 4264

ISUZU TF SERIES 2004 Workshop Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–93 13 Replace the ECM. Is the action complete? IMPORTANT: The replacement ECM must be programmed. Refer to section of the Service Programming System (SPS) in t

Page 2670 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–94 ENGINE DRIVEABILITY AND EMISSIONS NO CHECK ENGINE LAMP (MIL) Circuit Description The check engine lamp should be illuminated and steady for about five seconds with the ignition “ON” and th

Page 2671 of 4264

ISUZU TF SERIES 2004 Workshop Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–95 2 Using the DVM and check the “CHECK ENGINE” lamp circuit. 1. Ignition “Off”, engine “Off”. 2. Disconnect the ECM connector. 3. Ignition “On

Page 2672 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–96 ENGINE DRIVEABILITY AND EMISSIONS CHECK ENGINE LAMP (MIL) “ON” STEADY Circuit description The check engine lamp should always be illuminated and steady for about five seconds with ignition
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