Nissan Altima L32. Instruction — part 311
P0850 PNP SWITCH
EC-365
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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P0850 PNP SWITCH
Description
INFOID:0000000004349403
When the shift lever position is P or N (CVT), Neutral position (M/T), park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
DTC Logic
INFOID:0000000004349404
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES
>> GO TO 2.
NO
>> GO TO 5.
2.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 3.
3.
CHECK PNP SWITCH FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT-III. Then check the “P/N POSI SW” sig-
nal under the following conditions.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Go to
4.
PERFORM DTC CONFIRMATION PROCEDURE
1. Select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to normal operating temperature.
3. Maintain the following conditions for at least 50 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0850
Park/neutral position
switch
The signal of the park/neutral position (PNP)
switch is not changed in the process of engine
starting and driving.
• Harness or connectors
[The park/neutral position (PNP) switch
circuit is open or shorted.]
• Park/neutral position (PNP) switch
Position (Shift lever)
Known-good signal
N or P position (CVT)
Neutral position (M/T)
ON
Except above position
OFF
ENG SPEED
CVT: 1,300 - 6,375 rpm
M/T: 1,500 - 6,375 rpm
COOLAN TEMP/S
More than 70
°C (158°F)
EC-366
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P0850 PNP SWITCH
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
5.
PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-366, "Component Function Check"
NOTE:
Use component function check the overall function of the park/neutral position (PNP) switch circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Component Function Check
INFOID:0000000004349405
1.
PERFORM COMPONENT FUNCTION CHECK
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector and
ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000004349406
1.
CHECK PNP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Park/neutral position (PNP) switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between PNP switch harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair open circuit or short to ground or short to power
in harness or connectors.
2.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
B/FUEL SCHDL
CVT: 3.0 - 31.8 msec
M/T: 2.1 - 31.8 msec
VHCL SPEED SE
More than 64 km/h (40 mph)
Shift lever
Suitable position
ECM
Ground
Condition
Voltage
Connector
Terminal
E10
102
(PNP switch
signal)
Ground
Shift lever
P or N (CVT)
Neutral (M/T)
Approx. 0 V
Except above
BATTERY
VOLTAGE
JMBIA1600ZZ
PNP switch
Ground
Voltage
Connector
Terminal
F25 (CVT) (A)
F32 (M/T) (B)
1
Ground Battery voltage
JMBIA1601ZZ
P0850 PNP SWITCH
EC-367
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1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between PNP switch 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 4.
NO-1 >> Repair open circuit or short to ground or short to power in harness or connectors.
NO-2 >> CVT: GO TO 3.
3.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Check the continuity between PNP switch harness connector and ECM harness connector.
2. Check the continuity between IPDM E/R harness connector and ECM harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK PNP SWITCH
TM-308, "Component Inspection (Park/Neutral Position Switch)"
(CVT) or
(M/T).
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace PNP switch.
5.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
>> INSPECTION END
PNP switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
F25 (CVT)
F32 (M/T)
2
E10
102
Existed
PNP switch
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F25
2
F10
72
Existed
ECM
IPDM
Continuity
Connector
Terminal
Connector
Terminal
F10
102
E18
30
Existed
EC-368
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P1148 CLOSED LOOP CONTROL
P1148 CLOSED LOOP CONTROL
DTC Logic
INFOID:0000000004349407
DTC DETECTION LOGIC
NOTE:
DTC P1148 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosis for the corresponding DTC.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1148
Closed loop control
function
The closed loop control function for bank 1 does
not operate even when vehicle is driving in the
specified condition.
• Harness or connectors
(The A/F sensor 1 circuit is open or short-
ed.)
• A/F sensor 1
• A/F sensor 1 heater
The closed loop control function for bank 2 does
not operate even when vehicle is driving in the
specified condition.
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