General Information: Overview Infiniti M45 II

Description

Observe the following precautions to ensure safe and proper servicing. These precautions are not described in each individual section.

This volume explains "Removal, Disassembly, Installation, Inspection and Adjustment" and "Trouble Diagnoses".

Note. Trouble diagnoses indicate work procedures required to diagnose problems effectively. Observe the following instructions before diagnosing.

1. Before performing trouble diagnoses, read the "Preliminary Check", the "Symptom Chart" or the "Work Flow".
2. After repairs, re-check that the problem has been completely eliminated.
3. Refer to Component Parts and Harness Connector Location for the Systems described in each section for identification/location of components and harness connectors.
4. Refer to the Circuit Diagram for quick pinpoint check. If you need to check circuit continuity between harness connectors in more detail, such as when a sub-harness is used, refer to Wiring Diagram in each individual section and Harness Layout in PG section for identification of harness connectors.
5. When checking circuit continuity, ignition switch should be OFF.
6. Before checking voltage at connectors, check battery voltage.
7. After accomplishing the Diagnostic Procedures and Electrical Components Inspection, make sure that all harness connectors are reconnected as they were.

Scheme 1

1. Work and diagnostic procedure Start to diagnose a problem using procedures indicated in enclosed test groups.
2. Questions and required results Questions and required results are indicated in bold type in test group. The meaning of voltage is as follows: Battery voltage --> 11 - 14V or approximately 12V Voltage : Approximately OV --> Less than 1V
3. Symbol used in illustration Symbols included in illustrations refer to measurements or procedures. Before diagnosing a problem, familiarize yourself with each symbol. Refer to "Connector Symbols" and "KEY TO SYMBOLS SIGNIFYING MEASUREMENTS OR PROCEDURES" below.
4. Action items Next action for each test group is indicated based on result of each question. Test group number is shown in the left upper portion of each test group.

Abbreviations

The following ABBREVIATIONS are used

Scheme 2

1. CONSULT-II is a hand-held type tester. When it is connected with a diagnostic connector equipped on the vehicle side, it will communicate with the control unit equipped in the vehicle and then enable various kinds of diagnostic tests.

Scheme 3