Nissan Frontier D40. Instruction — part 426
REFRIGERANT PRESSURE SENSOR
EC-395
< COMPONENT DIAGNOSIS >
[QR25DE]
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OK
>> GO TO 3.
NG
>> Repair or replace ground connections.
3.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect refrigerant pressure sensor harness connector.
2.
Turn ignition switch ON.
3.
Check voltage between refrigerant pressure sensor terminal 3
and ground with CONSULT-III or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E5, F14
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair harness or connectors.
5.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between refrigerant pressure sensor terminal 1 and ECM terminal 67.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E5, F14
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit, short to ground or short to power in harness or connectors.
7.
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
BBIA0627E
Voltage: Approximately 5V
PBIB1872E
Continuity should exist.
EC-396
< COMPONENT DIAGNOSIS >
[QR25DE]
REFRIGERANT PRESSURE SENSOR
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E5, F14
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK INTERMITTENT INCIDENT
GI-46, "Intermittent Incident"
OK or NG
OK
>> Replace refrigerant pressure sensor.
NG
>> Repair or replace.
Continuity should exist.
ECM
EC-397
< ECU DIAGNOSIS >
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ECU DIAGNOSIS
ECM
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000005273431
Remarks:
z
Specification data are reference values.
z
Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in spite of the
ignition timing not being adjusted to the specification data. This IGN TIMING monitors the data calculated by the ECM according to the signals
input from the camshaft position sensor and other ignition timing related sensors.
MONITOR ITEM
CONDITION
SPECIFICATION
ENG SPEED
• Run engine and compare the CONSULT-III value with tachometer indication.
Almost the same speed as
the tachometer indication.
MAS A/F SE-B1
• See
.
B/FUEL SCHDL
• See
.
A/F ALPHA-B1
• See
.
COOLAN TEMP/S
• Engine: After warming up
More than 70
°
C (158
°
F)
A/F SEN1 (B1)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 1.5V
HO2S2 (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions are
met.
- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for
1 minute under no load.
0 - 0.3V
←→
Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions are
met.
- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for
1 minute under no load.
LEAN
←→
RICH
VHCL SPEED SE
• Turn drive wheels and compare the CONSULT-III value with speedometer indica-
tion.
Almost the same speed as
the speedometer indica-
tion.
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14V
ACCEL SEN 1
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.6 - 0.95V
Accelerator pedal: Fully depressed
Less than 4.75V
TP SEN 1-B1
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8V
START SIGNAL
• Ignition switch: ON
→
START
→
ON
OFF
→
ON
→
OFF
CLSD THL POS
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
ON
Accelerator pedal: Slightly depressed
OFF
AIR COND SIG
• Engine: After warming up, idle the en-
gine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates.)
ON
P/N POSI SW
• Ignition switch: ON
Shift lever: P or N (A/T), Neutral (M/T)
ON
Shift lever: Except above
OFF
PW/ST SIGNAL
• Engine: After warming up, idle the en-
gine
Steering wheel: Not being turned
OFF
Steering wheel: Being turned
ON
LOAD SIGNAL
• Ignition switch: ON
Lighting switch: 2nd
ON
Lighting switch: OFF
OFF
IGNITION SW
• Ignition switch: ON
→
OFF
→
ON
ON
→
OFF
→
ON
EC-398
< ECU DIAGNOSIS >
[QR25DE]
ECM
HEATER FAN SW
• Engine: After warming up, idle the en-
gine
Heater fan: Operating
ON
Heater fan: Not operating
OFF
BRAKE SW
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
INJ PULSE-B1
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 4.0 msec
IGN TIMING
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
10
°
- 20
°
BTDC
2,000 rpm
25
°
- 45
°
BTDC
CAL/LD VALUE
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
10% - 35%
2,500 rpm
10% - 35%
MASS AIRFLOW
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
1.0 - 4.0 g·m/s
2,500 rpm
4.0 - 12.0 g·m/s
PURG VOL C/V
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal is not depressed
even slightly, after engine starting)
0%
2,000 rpm
—
INT/V TIM (B1)
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
−
5
°
- 5
°
CA
2,000 rpm
Approx. 0
°
- 20
°
CA
INT/V SOL (B1)
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 0% - 60%
AIR COND RLY
• Engine: After warming up, idle the en-
gine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates)
ON
FUEL PUMP RLY
• For 1 second after turning ignition switch ON
• Engine running or cranking
ON
• Except above conditions
OFF
VENT CONT/V
• Ignition switch: ON
OFF
THRTL RELAY
• Ignition switch: ON
ON
HO2S2 HTR (B1)
• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for
1 minute under no load.
ON
• Engine speed: Above 3,600 rpm
OFF
VEHICLE SPEED
• Turn drive wheels and compare CONSULT-III value with the speedometer indica-
tion.
Almost the same speed as
the speedometer indica-
tion
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has
turned ON.
0 - 65,535 km
(0 - 40,723 mile)
A/F S1 HTR (B1)
• Engine: After warming up, idle the engine
0 - 100%
AC PRESS SEN
• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)
1.0 - 4.0V
MONITOR ITEM
CONDITION
SPECIFICATION
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