jump cable INFINITI QX56 2007 Factory Service Manual

[x] Cancel search | Manufacturer: INFINITI, Model Year: 2007, Model line: QX56, Model: INFINITI QX56 2007
Pages: 3061, PDF Size: 64.56 MB

Page 1571 of 3061

INFINITI QX56 2007 Factory Service Manual EC-488
< SERVICE INFORMATION >
DTC P1550 BATTERY CURRENT SENSOR
OK or NG
OK >> GO TO 9.
NG >> Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-138
.
>>INSPECTION END

Page 1577 of 3061

INFINITI QX56 2007 Factory Service Manual EC-494
< SERVICE INFORMATION >
DTC P1551, P1552 BATTERY CURRENT SENSOR
OK or NG
OK >> GO TO 9.
NG >> Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-138
.
>>INSPECTI

Page 1583 of 3061

INFINITI QX56 2007 Factory Service Manual EC-500
< SERVICE INFORMATION >
DTC P1553 BATTERY CURRENT SENSOR
OK or NG
OK >> GO TO 9.
NG >> Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-138
.
>>INSPECTION END

Page 1589 of 3061

INFINITI QX56 2007 Factory Service Manual EC-506
< SERVICE INFORMATION >
DTC P1554 BATTERY CURRENT SENSOR
OK or NG
OK >> GO TO 9.
NG >> Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-138
.
>>INSPECTION END

Page 1995 of 3061

INFINITI QX56 2007 Factory Service Manual SERVICE INFORMATION FOR ELECTRICAL INCIDENT
GI-29
< SERVICE INFORMATION >
C
D
E
F
G
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K
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MB
GI
N
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P
• Close the relay and probe at the solenoid.
voltage; open is further down the circuit than

SERVICE INFORMATION FOR ELECTRICAL INCIDENT
GI-29
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MB
GI
N
O
P
• Close the relay and probe at the solenoid.
voltage; open is further down the circuit than the solenoid.
no voltage; open is between relay and solenoid (point C).
Any powered circuit can be diagnosed using the approach in the previous example.
Testing for “Shorts” in the Circuit
To simplify the discussion of shorts in the system, please refer to the following schematic.
RESISTANCE CHECK METHOD
• Disconnect the battery negative cable and remove the blown fuse.
• Disconnect all loads (SW1 open, relay disconnected and solenoid disconnected) powered through the fuse.
• Connect one probe of the DMM to the load side of the fuse terminal. Connect the other probe to a known
good ground.
• With SW1 open, check for continuity.
continuity; short is between fuse terminal and SW1 (point A).
no continuity; short is further down the circuit than SW1.
• Close SW1 and disconnect the relay. Put probes at the load side of fuse terminal and a known good ground.
Then, check for continuity.
continuity; short is between SW1 and the relay (point B).
no continuity; short is further down the circuit than the relay.
• Close SW1 and jump the relay contacts with jumper wire. Put probes at the load side of fuse terminal and a
known good ground. Then, check for continuity.
continuity; short is between relay and solenoid (point C).
no continuity; check solenoid, retrace steps.
VOLTAGE CHECK METHOD
• Remove the blown fuse and disconnect all loads (i.e. SW1 open, relay disconnected and solenoid discon-
nected) powered through the fuse.
• Turn the ignition key to the ON or START position. Verify battery voltage at the battery + side of the fuse ter-
minal (one lead on the battery + terminal side of the fuse block and one lead on a known good ground).
• With SW1 open and the DMM leads across both fuse terminals, check for voltage.
voltage; short is between fuse block and SW1 (point A).
no voltage; short is further down the circuit than SW1.
• With SW1 closed, relay and solenoid disconnected and the DMM leads across both fuse terminals, check for
voltage.
voltage; short is between SW1 and the relay (point B).
no voltage; short is further down the circuit than the relay.
• With SW1 closed, relay contacts jumped with fused jumper wire check for voltage.
voltage; short is down the circuit of the relay or between the relay and the disconnected solenoid (point C).
no voltage; retrace steps and check power to fuse block.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted resistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even
when the ground connection looks clean, there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
• Remove the ground bolt or screw.
• Inspect all mating surfaces for tarnish, dirt, rust, etc.
SGI847-A

Page 2652 of 3061

INFINITI QX56 2007 Factory Service Manual SC-4
< SERVICE INFORMATION >
BATTERY
BATTERY
How to Handle BatteryINFOID:0000000003533316
CAUTION:
• If it becomes necessary to start the engine with a booster battery and jumper cables, use a 12-vo