Nissan Titan. Instruction — part 189
DIAGNOSIS SYSTEM (ECM)
EC-57
< SYSTEM DESCRIPTION >
[VK56DE]
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*1: This function is not necessary in the usual service procedure.
*2: For Flexible Fuel Vehicle
ACTIVE TEST MODE
Test Item
TARGET IGN TIM ADJ*
1
• IDLE CONDITION
When adjusting target ignition tim-
ing
CLSD THL POS LEARN
• Ignition on and engine stopped.
When learning the throttle valve
closed position
SAVING DATA FOR REPLC CPU
In this mode, save data that is in ECM.
When ECM is replaced.
WRITING DATA FOR REPLC CPU
In this mode, write data stored by “SAVE DATA FOR CPU
REPLC” in work support mode to ECM.
When ECM is replaced.
WORK ITEM
CONDITION
USAGE
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
FUEL INJEC-
TION
• Engine: Return to the original
trouble condition
• Change the amount of fuel injec-
tion using CONSULT.
If trouble symptom disappears, see
CHECK ITEM.
• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
ENG COOLANT
TEMP
• Engine: Return to the original
trouble condition
• Change the engine coolant tem-
perature using CONSULT.
If trouble symptom disappears, see
CHECK ITEM.
• Harness and connectors
• Engine coolant temperature sen-
sor
• Fuel injector
PURG VOL
CONT/V
• Engine: After warming up, run en-
gine at 1,500 rpm.
• Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT.
Engine speed changes according to
the opening percent.
• Harness and connectors
• Solenoid valve
FUEL/T TEMP
SEN
• Change the fuel tank temperature using CONSULT.
ALTERNATOR
DUTY
• Engine: Idle
• Change duty ratio using CON-
SULT.
Battery voltage changes.
• Harness and connectors
• IPDM E/R
• Alternator
FUEL PUMP RE-
LAY
• Ignition switch: ON
(Engine stopped)
• Turn the fuel pump relay ON and
OFF using CONSULT and listen
to operating sound.
Fuel pump relay makes the operat-
ing sound.
• Harness and connectors
• Fuel pump relay
IGNITION TIM-
ING
• Engine: Return to the original
trouble condition
• Timing light: Set
• Retard the ignition timing using
CONSULT.
If trouble symptom disappears, see
CHECK ITEM.
• Perform Idle Air Volume Learning.
POWER BAL-
ANCE
• Engine: After warming up, idle the
engine.
• A/C switch: OFF
• Selector lever: P or N
• Cut off each injector signal one at
a time using CONSULT.
Engine runs rough or dies.
• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
EC-58
< SYSTEM DESCRIPTION >
[VK56DE]
DIAGNOSIS SYSTEM (ECM)
DTC WORK SUPPORT MODE
Test Item
*: DTC P1442 and P1456 does not apply to A60 models but appears in DTC Work Support Mode screens.
SRT & P-DTC MODE
SRT STATUS Mode
• For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT screen; for items whose SRT
codes are not set, “INCMP” is displayed.
• “SRT STATUS” provides the presence or absence of permanent DTCs stored in ECM memory.
PERMANENT DTC STATUS Mode
How to display permanent DTC status
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Select “PERMANENT DTC STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT.
NOTE:
Permanent DTCs stored in ECM memory are displayed on the CONSULT screen to show if a driving pat-
tern required for erasing permanent DTCs is complete (CMPLT) or incomplete (INCMP).
CAUTION:
VENT CON-
TROL/V
• Ignition switch: ON
(Engine stopped)
• Turn solenoid valve ON and OFF
with the CONSULT and listen to
operating sound.
Solenoid valve makes an operating
sound.
• Harness and connectors
• Solenoid valve
V/T ASSIGN AN-
GLE
• Engine: Return to the original
trouble condition
• Change intake valve timing using
CONSULT.
If trouble symptom disappears, see
CHECK ITEM.
• Harness and connectors
• Intake valve timing control sole-
noid valve
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
Test mode
Test item
Corresponding DTC No.
Reference page
A/F SEN1
A/F SEN1 (B1) P1278/P1279
P0133
A/F SEN1 (B1) P1276
P0130
A/F SEN1 (B2) P1288/P1289
P0153
A/F SEN1 (B2) P1286
P0150
EVAPORATIVE
SYSTEM
EVP V/S LEAK P0456/P1456*
P0442
P0456
PURG FLOW P0441
P0441
PURG VOL CN/V P1444
P0443
HO2S2
HO2S2 (B1) P1146
P0138
HO2S2 (B1) P1147
P0137
HO2S2 (B1) P0139
P0139
HO2S2 (B2) P1166
P0158
HO2S2 (B2) P1167
P0157
HO2S2 (B2) P0159
P0159
DIAGNOSIS SYSTEM (ECM)
EC-59
< SYSTEM DESCRIPTION >
[VK56DE]
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Since the “PERMANENT DTC STATUS” screen displays the previous trip information, repeat the
following twice to update the information: “Ignition switch OFF”, “Wait for more than 10 seconds”
and “Ignition switch ON”.
NOTE:
This mode is not used in regions that permanent DTCs are not regulated by law.
SRT WORK SUPPORT Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
PERMANENT DTC WORK SUPPORT Mode
This mode enables a technician to drive a vehicle to complete the driving pattern that is required for erasing
permanent DTC.
NOTE:
This mode is not used in regions that permanent DTCs are not regulated by law.
JSBIA0062GB
EC-60
< ECU DIAGNOSIS INFORMATION >
[VK56DE]
ECM
ECU DIAGNOSIS INFORMATION
ECM
CONSULT Reference Value in Data Monitor Mode
INFOID:0000000009886513
NOTE:
• The following table includes information (items) inapplicable to this vehicle. For information (items) applica-
ble to this vehicle, refer to CONSULT display items.
• Numerical values in the following table are reference values.
• These values are input/output values that ECM receives/transmits and may differ from actual operations.
Example:
The ignition timing shown by the timing light may differ from the ignition timing displayed on the data monitor.
This occurs because the timing light shows a value calculated by ECM according to signals received from
the cam shaft position sensor and other sensors related to ignition timing.
For outlines of following items, refer to
MONITOR ITEM
CONDITION
SPECIFICATION
ENG SPEED
• Run engine and compare CONSULT value with the tachometer in-
dication.
Almost the same speed as the
tachometer indication.
MAS A/F SE-B1
See
B/FUEL SCHDL
See
A/F ALPHA-B1
A/F ALPHA-B2
See
COOLANT 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 2.2 V
HO2S2 (B1)
HO2S2 (B2)
• Revving engine from idle to 3,000 rpm quickly after the following
conditions are met.
• After 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)
HO2S2 MNTR (B2)
• 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 CONSULT value with the speed-
ometer indication.
Almost the same speed as the
speedometer indication
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14V
ACCEL SEN 1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0V
Accelerator pedal: Fully de-
pressed
4.2 - 4.8V
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0V
Accelerator pedal: Fully de-
pressed
4.2 - 4.8V
TP SEN 1-B1
TP SEN 2-B1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully de-
pressed
Less than 4.75V
FUEL T/TMP SE
• Ignition switch: ON
Indicates fuel tank temperature.
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8V
FUEL LEVEL SE
• Ignition switch: ON
Depending on fuel level of fuel
tank.
START SIGNAL
• Ignition switch: ON
→ START → ON
OFF
→ ON → OFF
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