Nissan Maxima Service and Repair Manual: Power control system

  • System description
  • DTC/circuit diagnosis
  • ECU diagnosis information
  • IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) Reference Value VALUES ON THE DIAGNOSIS TOOL TERMINAL LAYOUT Fail Safe CAN COMMUNICATION CONTROL When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN communication recovers normally, it also returns to normal control. If No CAN Communication Is Available With ECM If No CAN Communication Is Available With BCM IGNITION RELAY MALFUNCTION DETECTION FUNCTION IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay-1 inside it.

  • Wiring diagram
  • IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) Wiring Diagram

  • Precaution
  • Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

  • Removal and installation
  • IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) Removal and Installation CAUTION: Do not remove the relays from the IPDM E/R. Tampering with the relays may cause additional incidents with the vehicle. REMOVAL Disconnect battery negative terminal. Refer to PG-67, "Removal and Installation (Battery)". Remove the IPDM E/R cover (1) while pressing the pawl (A) at the rear end of the IPDM E/R cover (1). Disconnect the harness connectors from the IPDM E/R. While depressing the tabs (A) remove the IPDM E/R (1) from the vehicle. INSTALLATION Installation is in the reverse order of removal.

  • Basic inspection
  • DIAGNOSIS AND REPAIR WORKFLOW Work Flow OVERALL SEQUENCE DETAILED FLOW 1. GET INFORMATION FOR SYMPTOM Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred). 2. CHECK DTC Check DTC for BCM and IPDM E/R. Perform the following procedure if DTC is displayed. Record DTC and freeze frame data (Print them out with CONSULT.) Erase DTC. Study the relationship between the cause detected by DTC and the symptom described by the customer. Check related service bulletins for information. 3. CONFIRM THE SYMPTOM Confirm the symptom described by the customer.

  • System description
  • DTC/circuit diagnosis
  • Power supply and ground circuit
  • BCM BCM : Diagnosis Procedure 1. CHECK FUSE AND FUSIBLE LINK Check if the following BCM fuses or fusible link are blown. 2. CHECK POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect BCM. Check voltage between BCM harness connector and ground. 3. CHECK GROUND CIRCUIT Check continuity between BCM harness connector and ground. BCM : Special Repair Requirement 1. REQUIRED WORK WHEN REPLACING BCM IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) : Diagnosis Procedure 1. CHECK FUSES AND FUSIBLE LINK Check that the following IPDM E/R fuses or fusible link are not blown. 2.

  • ECU diagnosis information
  • Wiring diagram
  • POWER DISTRIBUTION SYSTEM Wiring Diagram

  • Symptom diagnosis
  • POWER DISTRIBUTION SYSTEM SYMPTOMS Symptom Table Before performing the diagnosis in the following table

  • Precaution
  • Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

  • Preparation
  • Special Service Tools The actual shapes of the tools may differ from those illustrated here.

  • Removal and installation
  • BCM (BODY CONTROL MODULE) Removal and Installation For removal and installation of the BCM. PUSH BUTTON IGNITION SWITCH Removal and Installation REMOVAL Remove push-button ignition switch from cluster lid A using a suitable tool. Disconnect harness connector from push-button ignition switch. INSTALLATION Installation is in the reverse order of removal.

CAN communication circuit

System description