Nissan Maxima Service and Repair Manual: Lan system
- Precaution
- System description
- Basic inspection
- How to use this manual
- Precaution
- Basic inspection
- System description
- Wiring diagram
- DTC/circuit diagnosis
- DTC/circuit diagnosis
- DTC/circuit diagnosis
- Main line between HVAC and A-bag circuit
- DTC/circuit diagnosis
- DTC/circuit diagnosis
PRECAUTIONS Precautions for Trouble Diagnosis CAUTION: Never apply 7.0 V or more to the measurement terminal. Use a tester with open terminal voltage of 7.0 V or less. Turn the ignition switch OFF and disconnect the battery cable from the negative terminal when checking the harness. Precautions for Harness Repair Solder the repaired area and wrap tape around the soldered area. NOTE: A fray of twisted lines must be within 110 mm (4.33 in). Bypass connection is never allowed at the repaired area. NOTE: Bypass connection may cause CAN communication error. The spliced wire becomes separated and the characteristics of twisted line are lost.
DIAGNOSIS AND REPAIR WORKFLOW Trouble Diagnosis Flow Chart Trouble Diagnosis Procedure INTERVIEW WITH CUSTOMER Interview with the customer is important to detect the root cause of CAN communication system errors and to understand vehicle condition and symptoms for proper trouble diagnosis. Points in interview What: Parts name, system name When: Date, Frequency Where: Road condition, Place In what condition: Driving condition/environment Result: Symptom NOTE: Check normal units as well as error symptoms. - Example: Circuit between ECM and the combination meter is judged normal if the customer indicates tachometer functions normally.
HOW TO USE THIS SECTION Caution This section describes information peculiar to a vehicle and inspection procedures. For trouble diagnosis procedure, refer to LAN-15, "Trouble Diagnosis Procedure". Abbreviation List Unit name abbreviations in CONSULT CAN diagnosis and in this section are as per the following list.
PRECAUTIONS 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.
DIAGNOSIS AND REPAIR WORKFLOW Interview Sheet
CAN COMMUNICATION SYSTEM CAN System Specification Chart Determine CAN system type from the following specification chart. NOTE: Refer to LAN-15, "Trouble Diagnosis Procedure" for how to use CAN system specification chart. VEHICLE EQUIPMENT IDENTIFICATION INFORMATION NOTE: Check CAN system type from the vehicle shape and equipment. 1. Seat memory switches A. With automatic drive positioner 2. Color display B. With color display CAN Communication Signal Chart Refer to LAN-14, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal chart. NOTE: Refer to LAN-20, "Abbreviation List" for the abbreviations of the connecting units.
CAN SYSTEM Wiring Diagram
MAIN LINE BETWEEN DLC AND HVAC CIRCUIT Diagnosis Procedure 1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) Turn the ignition switch OFF. Disconnect the battery cable from the negative terminal. Disconnect the following harness connectors. ECM A/C auto amp. Check the continuity between the data link connector and the A/C auto amp. harness connector.
Diagnosis Procedure 1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) Turn the ignition switch OFF. Disconnect the battery cable from the negative terminal. Disconnect the following harness connectors. A/C auto amp. Harness connectors M1 and E30 Check the continuity between the A/C auto amp. harness connector and the harness connector.
