Nissan Titan. Manual — part 287
P2138 APP SENSOR
EC-449
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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Diagnosis Procedure
INFOID:0000000009886903
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
OK or NG
OK
>> GO TO 2.
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 or tester.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
3.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check voltage between APP sensor terminal 6 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 4.
BBIA0354E
BBIA0361E
Voltage: Approximately 5V
JPBIA5715ZZ
Voltage: Approximately 5V
JSBIA1930ZZ
EC-450
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P2138 APP SENSOR
4.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 6 and ECM terminal 91.
Refer to Wiring Diagram.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit in harness or connectors.
5.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals
OK or NG
OK
>> GO TO 6.
NG
>> Repair short to ground or short to power in harness connectors.
6.
CHECK THROTTLE POSITION SENSOR
EC-451, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 7.
7.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform
EC-128, "Throttle Valve Closed Position Learning"
3. Perform
EC-129, "Idle Air Volume Learning"
.
>> INSPECTION END
8.
CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 82 and APP sensor terminal 1, ECM terminal 83 and
APP sensor terminal 3.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 106 and APP sensor terminal 2, ECM terminal 98 and
APP sensor terminal 5.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
Continuity should exist.
ECM terminal
Sensor terminal
Reference Wiring Diagram
47
Electric throttle control actuator terminal 2
91
APP sensor terminal 6
Continuity should exist.
Continuity should exist.
P2138 APP SENSOR
EC-451
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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OK or NG
OK
>> GO TO 10.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.
CHECK ACCELERATOR PEDAL POSITION SENSOR
EC-451, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 11.
11.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform
EC-128, "Accelerator Pedal Released Position Learning"
.
3. Perform
EC-128, "Throttle Valve Closed Position Learning"
4. Perform
EC-129, "Idle Air Volume Learning"
.
>> INSPECTION END
12.
CHECK INTERMITTENT INCIDENT
GI-39, "How to Check Terminal"
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000009886904
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 sig-
nal), 98 (APP sensor 2 signal) and ground under the following
conditions.
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform
EC-128, "Accelerator Pedal Released Position Learning"
.
6. Perform
EC-128, "Throttle Valve Closed Position Learning"
7. Perform
EC-129, "Idle Air Volume Learning"
.
Terminal
Accelerator pedal
Voltage
106
(Accelerator pedal position
sensor 1)
Fully released
0.5 - 1.0V
Fully depressed
4.2 - 4.8V
98
(Accelerator pedal position
sensor 2)
Fully released
0.25 - 0.5V
Fully depressed
2.0 - 2.5V
MBIB0023E
EC-452
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
ASCD BRAKE SWITCH
ASCD BRAKE SWITCH
Component Description
INFOID:0000000009886909
When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal).
Diagnosis Procedure
INFOID:0000000009886910
1.
CHECK OVERALL FUNCTION-I
With CONSULT
1. Turn ignition switch ON.
2. Select “BRAKE SW 1” in “DATA MONITOR” mode with CONSULT.
3. Check “BRAKE SW 1” indication under the following conditions.
Without CONSULT
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 108 and ground under the
following conditions.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
CHECK OVERALL FUNCTION-II
With CONSULT
Check “BRAKE SW 2” indication in “DATA MONITOR” mode.
Without CONSULT
Check voltage between ECM terminal 101 and ground under the following conditions.
BBIA0087E
CONDITION
INDICATION
Brake pedal: Slightly depressed
OFF
Brake pedal: Fully released
ON
CONDITION
VOLTAGE
Brake pedal: Slightly depressed
Approximately 0V
Brake pedal: Fully released
Battery voltage
MBIB0061E
CONDITION
INDICATION
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
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