Nissan Sentra Service Manual: How to read wiring diagrams

Key to Symbols Signifying Measurements or Procedures

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Connector symbols

Most of connector symbols in wiring diagrams are shown from the terminal side. Connector symbols shown from the terminal side are enclosed by a single line and followed by the direction mark. ...

Other materials:

U1117 Lost communication (ABS)
DTC Logic DTC DETECTION LOGIC DTC CONSULT screen terms [Trouble diagnosis content] DTC detection condition Possible causes U1117 LOST COMM (ABS) [Lost Communication With ABS] When the ignition switch is ON, TCM is unable to receive the CAN communications ...

Removal and installation
Ipdm e/r Exploded view Ipdm e/r Ipdm e/r cover a Ipdm e/r cover b Removal and installation Caution: Ipdm e/r integrated relays are not serviceable and must not be removed from unit. Removal Remove inlet air duct (upper). Refer to em-25, "removal and installation". ...

Wiring diagram
Base audio Wiring diagram ...