Infiniti M35/M45 Y50. Manual — part 693
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DTC P1551, P1552 BATTERY CURRENT SENSOR
EC-1245
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DTC Confirmation Procedure
NBS005LP
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V with ignition
switch ON
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Wait at least 10 seconds.
4.
If 1st trip DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y
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EC-1246
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DTC P1551, P1552 BATTERY CURRENT SENSOR
Wiring Diagram
NBS005LQ
TBWT1064E
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DTC P1551, P1552 BATTERY CURRENT SENSOR
EC-1247
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
*: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
SC-5, "SPECIFIC GRAVITY CHECK"
Diagnostic Procedure
NBS005LR
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten ground screws on the body.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
49
B/Y
Sensor power supply
(Battery current sensor)
[Ignition switch: ON]
Approximately 5V
67
B/W
Sensor ground
(Battery current sensorr)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
71
L/R
Battery current sensor
[Engine is running]
●
Battery: Fully charged*
●
Idle speed
Approximately 2.6 - 3.5V
1.
Body ground M70
2.
Body ground M16
PBIB2782E
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EC-1248
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DTC P1551, P1552 BATTERY CURRENT SENSOR
2.
CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect battery current sensor (1) harness connector.
2.
Turn ignition switch ON.
3.
Check voltage between battery current sensor terminal 1 and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E11, F2
●
Harness for open or short between battery current sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between battery current sensor terminal 2 and ECM terminal 67.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E73, F68
●
Harness for open or short between battery current sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB2685E
Voltage: Approximately 5V
PBIA9891J
Continuity should exist.
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