#ISUZU 4JJ1 SERVICE MANUAL PDF DRIVER#

SVS lamp operation The SVS lamp is installed inside the instrument panel cluster. When the ECM turns on the MIL due to a failure related to engine performance, a DTC is stored. When the ECM detects a failure, the MIL remains on after the engine is started. When there is no failure diagnosis, the MIL turns OFF after the engine is started. This is the light test for confirming that the MIL turns on. The MIL turns on when the engine is turned OFF with ignition switch ON. The following is the list of MIL operation modes. The MIL indicates that vehicle maintenance is required due to a failure related to engine performance. The MIL shows the engine symbol as ON indication. Operations of MIL The MIL is installed in the instrument panel cluster. The ECM controls most components with electronic switches which complete a ground circuit when turned ON. The input/output devices in the ECM include analog-todigital converters, signal buffers, counters, and special drivers. Use a 10-megohm input impedance DMM to ensure accurate voltage readings. An ordinary shop voltmeter may not give an accurate reading because the voltmeter input impedance is too low. The ECM can do this because resistance in the ECM is so high in value that a test light may not illuminate when connected to the circuit. DTCs identify the system faults to aid the technician in making repairs.Д®CM voltage description The ECM applies the buffer voltage to various switches and sensors.

#ISUZU 4JJ1 SERVICE MANUAL PDF DRIVER#

The ECM can recognize operational problems, alert the driver through the check engine warning light, and store DTCs. The ECM performs the diagnostic function of the system. The ECM controls the systems that affect vehicle performance. The fuel system control The EGR system control The A/C compressor control The immobilizer system control On-board diagnostics for engine control The ECM constantly observes the information from various sensors. The ECM mainly controls the following items. The ECM should remain connected to the ECM harness. In some cases, these circuits should only be tested using a DMM. When testing for opens and shorts, do not ground or apply voltage to any of the ECM circuits unless instructed to do so. Function, structure, operation of engine ECM The ECM is designed to withstand normal current draws associated with vehicle operation. Function, structure, operation of engine null (4JJ1)ДЇunction, structure, operation of engine (4JJ1) 1. 6A-150 Circuit check.6A-150 Air Cleaner Element. 6A-138 Disassembly.6A-139 Reassembly.6A-139 Installation. 6A-135 Crank Case and Oil Pan.6A-137 Components.6A-137 Removal. 6A-131 Special Tools.6A-132 Oil Filter Assembly and Oil Cooler. 6A-120 Torque Specifications.6A-123 Cylinder Block. 6A-109 Torque Specifications.6A-110 Special Tools.6A-110 Crankshaft Rear Oil Seal. 6A-105 Torque Specifications.6A-107Д¦A-2 ENGINE MECHANICAL (4JJ1) Crankshaft Front Oil Seal.6A-108 Components.6A-108 Removal. 6A-100 Torque Specifications.6A-102 Special Tools.6A-102 Gear Case Assembly. SECTION 6A ENGINE MECHANICAL (4JJ1) TABLE OF CONTENTS ISUZU DIESEL ENGINE (4JJ1). Isuzu Motors Limited E-Solutions & Service Marketing Dept.

Isuzu 4jj1 service manual pdf