Infiniti I30 (A33). Manual — part 320
Wiring Diagram
=NHEC0365
MEC796C
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1605 A/T DIAGNOSIS COMMUNICATION LINE
Wiring Diagram
EC-595
Diagnostic Procedure
NHEC0366
1
CHECK A/T DIAGNOSIS COMMUNICATION LINE INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and TCM (Transmission Control Module) harness connector.
SEC004C
SEF271X
3. Check harness continuity between ECM terminal 60 and TCM terminal 15. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 2.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
2
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.
©
INSPECTION END
DTC P1605 A/T DIAGNOSIS COMMUNICATION LINE
Diagnostic Procedure
EC-596
AEC877A
Component Description
NHEC0367
When the gear position is “P” (A/T models only) or “N”, park/neutral
position (PNP) switch is “ON”.
ECM detects the position because the continuity of the line (the
“ON” signal) exists.
For A/T models, the park/neutral position (PNP) switch assembly
also includes a transmission range switch to detect selector lever
position.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0368
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
P/N POSI SW
I
Ignition switch: ON
Shift lever: “P” or “N”
ON
Except above
OFF
On Board Diagnosis Logic
NHEC0370
Malfunction is detected when the signal of the park/neutral position
(PNP) switch is not changed in the process of engine starting and
driving.
Possible Cause
NHEC0595
I
Harness or connectors
[The park/neutral position (PNP) switch circuit is open or
shorted.]
I
Park/neutral position (PNP) switch
DTC Confirmation Procedure
NHEC0371
CAUTION:
Always drive vehicle at a safe speed.
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.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1706 PARK/NEUTRAL POSITION (PNP) SWITCH
Component Description
EC-597
SEF212Y
SEF213Y
WITH CONSULT-II
NHEC0371S01
1)
Turn ignition switch “ON”.
2)
Select “P/N POSI SW” in “DATA MONITOR” mode with CON-
SULT-II. Then check the “P/N POSI SW” signal under the fol-
lowing conditions.
Position (Selector lever)
Known-good signal
“N” and “P” position
ON
Except the above position
OFF
If NG, go to “Diagnostic Procedure”, EC-600.
If OK, go to following step.
3)
Select “DATA MONITOR” mode with CONSULT-II.
4)
Start engine and warm it up to normal operating temperature.
5)
Maintain the following conditions for at least 60 consecutive
seconds.
ENG SPEED
1,800 - 2,600 rpm
COOLAN TEMP/S
More than 70°C (158°F)
B/FUEL SCHDL
2 - 10 msec
VHCL SPEED SE
70 - 100 km/h (43 - 62 MPH)
Selector lever
Suitable position
6)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-600.
SEF359X
Overall Function Check
NHEC0372
Use this procedure to check the overall function of the park/neutral
position (PNP) switch circuit. During this check, a 1st trip DTC
might not be confirmed.
WITH GST
NHEC0372S01
1)
Turn ignition switch “ON”.
2)
Check voltage between ECM terminal 44 and body ground
under the following conditions.
Condition (Gear position)
Voltage V (Known good data)
“P” and “N” position
Approx. 0
Except the above position
Battery voltage
3)
If NG, go to “Diagnostic Procedure”, EC-600.
DTC P1706 PARK/NEUTRAL POSITION (PNP) SWITCH
DTC Confirmation Procedure (Cont’d)
EC-598
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