The fuse box aka Power Panel was no good. Old PCM is roasted, see attached picture when attempts are made to communicate after fixing the wiring problem An open ground or power (B+) circuit on a fuel-injected engine removes power from the ECM and prevents the engine from starting. PCM receives battery voltage (B+) through a fuse or fusible link. OBD-PC Link allows you to view the information you retrieved from your vehicle, on your PC. The Nissan DataScan I is intended for Nissan cars build between years 19. With the ignition key ON and bus activity, the voltage should vary from 0 to 5V depending on the amount of bus activity! Most people looking for Nissan data scan 1.52 downloaded: Nissan Data Scan. With the ignition key ON and no bus activity, This tests the ECM Voltage supply as no power may be caused by a blown lighter fuseĬonnect positive DMM lead to either DLC bias terminalsĬonnect negative DMM lead to the ground terminal With the Ignition on, voltage on the class 2 serial data pin should be 5V or fluctuating between 3.5V and 5.0V, If open, PCM cannot transmit data to the scan toolĬonnect positive DMM lead to DLC Battery + terminalĬonnect negative DMM lead to battery ground terminal NOTE: An open circuit or high ground resistance means that the PCM will never enter diagnostic mode.Ĭonnect the positive DMM lead to the class 2 Serial Data pin and the negative DMM lead to either pin 4 or pin 5 or a known good ground With the ignition on, voltage drop across the ground terminal should be 0.1 Volts or less Do not connect to body or chassis ground but to the battery terminal directly If the scan tool does not receive data from an OBD II vehicleĬonnect the positive DMM lead to DLC pin 4 and the negative DMM lead to the negative battery terminal, using jumper wires if necessary.
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