2007 INFINITI QX56 service

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GI-9
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SYMBOLS
How to Follow Trouble DiagnosisINFOID:0000000003531484
DESCRIPTION
NOTICE:
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.
SAIA0749E

GI-10
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HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES
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 are as follows:
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" in GI Section and "KEY TO SYM-
BOLS 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.
HARNESS WIRE COLOR AND CONNECTOR NUMBER INDICATION
There are two types of harness wire color and connector number indication.
Type 1: Harness Wire Color And Connector Number Are Shown In Illustration
SAIA0256E
a. Battery voltage → 11 - 14V or approximately 12V
b. Voltage : Approximately 0V → Less than 1V

HOW TO USE THIS MANUAL
GI-11
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• Letter designations next to test meter probe indicate harness wire
color.
• Connector numbers in a single circle (e.g. M33) indicate harness
connectors.
• Connector numbers in a double circle indicate component connec-
tors.
Type 2: Harness Wire Color And Connector Number Are Shown In Text
AGI070
SGI144A

GI-12
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KEY TO SYMBOLS SIGNIFYING MEASUREMENTS OR PROCEDURES
SAIA0750E

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GI-13
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How to Read Wiring DiagramINFOID:0000000003531485
CONNECTOR SYMBOLS
SAIA0751E

GI-14
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HOW TO USE THIS MANUAL
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.
• Connector symbols shown from the harness side are enclosed by
a double line and followed by the direction mark.
• Certain systems and components, especially related to OBD, may
use a new style slide-locking type harness connector. For descrip-
tion and how to disconnect, refer to PG-66
.
• Male and female terminals
Connector guides for male terminals are shown in black and
female terminals in white in wiring diagrams.
SAMPLE/WIRING DIAGRAM - EXAMPL -
SGI364
SGI363

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GI-15
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• For detail, refer to following “DESCRIPTION”.
SGI091A

GI-16
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HOW TO USE THIS MANUAL
Optional Splice
DESCRIPTION
SGI942
Num-
berItem Description
1 Power condition • This shows the condition when the system receives battery positive voltage (can be operated).
2 Fusible link• The double line shows that this is a fusible link.
• The open circle shows current flow in, and the shaded circle shows current flow out.
3Fusible link/fuse loca-
tion• This shows the location of the fusible link or fuse in the fusible link or fuse box. For arrange-
ment, refer to PG section, POWER SUPPLY ROUTING.
4Fuse• The single line shows that this is a fuse.
• The open circle shows current flow in, and the shaded circle shows current flow out.
5 Current rating • This shows the current rating of the fusible link or fuse.
6 Connectors• This shows that connector E3 is female and connector M1 is male.
• The G/R wire is located in the 1A terminal of both connectors.
• Terminal number with an alphabet (1A, 5B, etc.) indicates that the connector is SMJ connector.
Refer to PG section, SMJ (SUPER MULTIPLE JUNCTION).
7 Optional splice • The open circle shows that the splice is optional depending on vehicle application.
8 Splice • The shaded circle shows that the splice is always on the vehicle.
9 Page crossing• This arrow shows that the circuit continues to an adjacent page.
• The A will match with the A on the preceding or next page.
10 Common connector • The dotted lines between terminals show that these terminals are part of the same connector.
11 Option abbreviation • This shows that the circuit is optional depending on vehicle application.
12 Relay• This shows an internal representation of the relay. For details, refer to PG section, STAN-
DARDIZED RELAY.
13 Connectors • This shows that the connector is connected to the body or a terminal with bolt or nut.