Infiniti QX4 (R50). Manual — part 217
ECM Terminals and Reference Value
=NBEC0664
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.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
85
Y
Crankshaft position
sensor (POS)
[Engine is running]
I
Idle speed
Approximately 2.4V
SEF057V
[Engine is running]
I
Engine speed is 2,000 rpm.
Approximately 2.3V
SEF058V
On Board Diagnosis Logic
NBEC0193
Malfunction is detected when 1° signal is not entered to ECM for
the first few seconds during engine cranking, or 1° signal is not
entered to ECM during engine running.
Possible Cause
NBEC0493
I
Harness or connectors
(The crankshaft position sensor (POS) circuit is open or
shorted.)
I
Crankshaft position sensor (POS)
I
Starter motor (Refer to EL section.)
I
Starting system circuit (Refer to EL section.)
I
Dead (Weak) battery
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
ECM Terminals and Reference Value
EC-335
SEF058Y
DTC Confirmation Procedure
NBEC0194
NOTE:
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 bat-
tery voltage is more than 10.5V.
WITH CONSULT-II
NBEC0194S01
1)
Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2)
Crank engine for at least two seconds.
3)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-338.
WITH GST
NBEC0194S02
Follow the procedure “With CONSULT-II” above.
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
DTC Confirmation Procedure
EC-336
Wiring Diagram
NBEC0195
MEC959C
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
Wiring Diagram
EC-337
Diagnostic Procedure
NBEC0196
1
RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
SEF959Y
©
GO TO 2.
2
CHECK CKPS (POS) POWER SUPPLY CIRCUIT
1. Disconnect harness connectors E132, E135.
SEF978Y
2. Check voltage between harness connector E135 terminal 6 and ground with CONSULT-II or tester.
SEF979Y
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
Diagnostic Procedure
EC-338
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