Nissan Titan A60. Manual — part 420
EC-346
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0643 SENSOR POWER SUPPLY
NG
>> Repair or replace ground connections.
2.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness
connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 7 and ground with
CONSULT-III or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 3.
3.
CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals
OK or NG
OK
>> GO TO 4.
NG
>> Repair short to ground or short to power in harness or connectors.
4.
CHECK COMPONENTS
Check the following.
• EVAP control system pressure sensor (Refer to
EC-304, "Component Inspection"
.)
• Power steering pressure sensor (Refer to
EC-339, "Component Inspection"
• Battery current sensor (Refer to
EC-374, "Component Inspection"
.)
• Refrigerant pressure sensor.
OK or NG
OK
>> GO TO 7.
NG
>> Replace malfunctioning components.
5.
CHECK ACCELERATOR PEEDAL POSITION SENSOR
EC-427, "Component Inspection"
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
BBIA0361E
Voltage: Approximately 5V
JMBIA0601ZZ
ECM terminal
Sensor terminal
Reference Wiring Diagram
48
EVAP control system pressure sensor terminal 3
49
Refrigerant pressure sensor terminal 1
Battery current sensor terminal 1
68
Power steering pressure sensor terminal 1
90
APP sensor terminal 7
P0643 SENSOR POWER SUPPLY
EC-347
< DTC/CIRCUIT DIAGNOSIS >
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6.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal position assembly.
2. Perform
EC-119, "Accelerator Pedal Released Position Learning"
.
3. Perform
EC-119, "Throttle Valve Closed Position Learning"
4. Perform
EC-120, "Idle Air Volume Learning"
.
>> INSPECTION END
7.
CHECK INTERMITTENT INCIDENT
GI-36, "How to Check Terminal"
GI-39, "Intermittent Incident"
>> INSPECTION END
EC-348
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0850 PNP SWITCH
P0850 PNP SWITCH
Component Description
INFOID:0000000006158796
When the gear position is P or N, transmission range switch is ON.
TCM detects the position because the continuity of the line (the ON signal) exists.
Then the TCM sends the PNP signal to the ECM via combination meter.
On Board Diagnosis Logic
INFOID:0000000006158797
DTC Confirmation Procedure
INFOID:0000000006158798
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition swich OFF and wait at least 10 seconds.
2. Turn ignition swich ON.
3. Turn ignition swich OFF and wait at least 10 seconds.
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.
If NG, go to
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Start engine and warm it up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive seconds.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to
Overall Function Check
INFOID:0000000006158799
Use this procedure to check the overall function of the park/neutral position (PNP) signal circuit. During this
check, a 1st trip DTC might not be confirmed.
WITH GST
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0850
0850
Park/neutral position
switch
The park/neutral position (PNP) signal is not
changed in the process of engine starting and
driving.
• Harness or connectors
[The park/neutral position (PNP) signal
circuit is open or shorted.]
• Combination meter
• TCM
Position (Selector lever)
Known-good signal
N or P position
ON
Except the above position
OFF
ENG SPEED
1,000 - 6,375 rpm
COOLAN TEMP/S
More than 70
°C (158°F)
B/FUEL SCHDL
2.0 - 31.8 msec
VHCL SPEED SE
More than 64 km/h (40 MPH)
Selector lever
Suitable position
P0850 PNP SWITCH
EC-349
< DTC/CIRCUIT DIAGNOSIS >
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1. Turn ignition switch ON.
2. Check voltage between ECM terminal 102 (PNP signal) and
ground under the following conditions.
3. If NG, go to
Diagnosis Procedure
INFOID:0000000006158800
1.
CHECK DTC WITH TCM
Refer to
TM-34, "OBD-II Diagnostic Trouble Code (DTC)"
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace.
2.
CHECK STARTING SYSTEM
Turn ignition switch OFF, then turn it to START.
Does starter motor operate?
Yes or No
Yes
>> GO TO 3.
No
>> Refer to
STR-16, "Removal and Installation"
.
3.
CHECK PNP INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector.
3. Disconnect combination meter harness connector.
4. Check harness continuity between A/T assembly terminal 9 and combination meter terminal 39.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F14, E5
• Harness connectors E152, M31
• Harness for open or short between A/T assembly and combination meter
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK PNP INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 102 and combination meter terminal 40.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
Condition (Gear position)
Voltage (V) (Known good data)
P or N position
Approx. 0
Except the above position
BATTERY VOLTAGE
(11 - 14V)
MBIB0043E
Continuity should exist.
Continuity should exist.
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