Infiniti FX35, FX50 (S51). Manual — part 718
P1554 BATTERY CURRENT SENSOR
EC-413
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
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2.
Disconnect ECM harness connector.
3.
Check the continuity between battery current sensor harness connector and ECM harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F1, E3
• Harness for open or short between battery current sensor and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
11.
CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between battery current sensor harness connector and ECM harness connector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> GO TO 12.
12.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F1, E3
• Harness for open or short between battery current sensor and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
13.
CHECK BATTERY CURRENT SENSOR
EC-413, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Replace battery negative cable assembly.
14.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005237019
1.
CHECK BATTERY CURRENT SENSOR
1.
Turn ignition switch OFF.
2.
Reconnect harness connectors disconnected.
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E21
2
F102
95
Existed
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E21
3
F102
91
Existed
EC-414
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P1554 BATTERY CURRENT SENSOR
3.
Disconnect battery negative cable (1).
4.
Install jumper cable (A) between battery negative terminal and
body ground.
5.
Turn ignition switch ON.
6.
Check the voltage between ECM harness connector terminals
under the following conditions.
Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace battery negative cable assembly.
: To body ground
ECM
Voltage (V)
Connector
+
–
Terminal
Terminal
F102
91
(Battery current sensor signal)
95
Approx. 2.5
JMBIA1512ZZ
P1564 ASCD STEERING SWITCH
EC-415
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
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P1564 ASCD STEERING SWITCH
Description
INFOID:0000000005237020
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to
for the ASCD function.
DTC Logic
INFOID:0000000005237021
DTC DETECTION LOGIC
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 10 seconds.
2.
Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
3.
Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
4.
Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 sec-
onds.
5.
Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
6.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005237022
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection M95. Refer to Ground Inspection in
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-III
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P1564
ASCD steering switch
• An excessively high voltage signal from the
ASCD steering switch is sent to ECM.
• ECM detects that input signal from the
ASCD steering switch is out of the specified
range.
• ECM detects that the ASCD steering switch
is stuck ON.
• Harness or connectors
(The switch circuit is open or shorted.)
• ASCD steering switch
• ECM
EC-416
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P1564 ASCD STEERING SWITCH
1.
Turn ignition switch ON.
2.
Select “MAIN SW”, “CANCEL SW”, “RESUME/ACC SW” and “SET SW” in “DATA MONITOR” mode with
CONSULT-III.
3.
Check each item indication under the following conditions.
Without CONSULT-III
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 3.
3.
CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect combination switch harness connector M303.
4.
Check the continuity between combination switch and ECM harness connector.
5.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch
>> Repair open circuit, short to ground or short to power in harness or connectors.
Monitor item
Condition
Indication
MAIN SW
MAIN switch
Pressed
ON
Released
OFF
CANCEL SW
CANCEL switch
Pressed
ON
Released
OFF
RESUME/ACC SW
RESUME/ACCEL-
ERATE switch
Pressed
ON
Released
OFF
SET SW
SET/COAST switch
Pressed
ON
Released
OFF
ECM
Condition
Voltage (V)
Connector
+
–
Terminal
Terminal
M107
101
(ASCD steering switch signal)
108
MAIN switch: Pressed
Approx. 0
CANCEL switch: Pressed
Approx. 1
SET/COAST switch: Pressed
Approx. 2
RESUME/ACCELERATE switch: Pressed
Approx. 3
All ASCD steering switches: Released
Approx. 4
Combination switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
M303
16
M107
108
Existed
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