Pressure NISSAN TERRANO 2004 Service Manual Online

Component Description
Engine oil pressure switches that monitor oil pressure at high
engine speed (switch-2) and oil pressure at low engine speed
(switch-1) are located on oil passage.
For detection of oil pressure at low engine speed, engine oil pres-
sure switch-1 turns oil pressure warning lamp ON if oil pressure
drops too low under normal engine running speed (below specified
pressure of engine oil pressure switch-1 at low engine speed).
For detection of oil pressure at high engine speed, engine oil pres-
sure switch-2 sends an ON signal to the ECM if oil pressure drops
lower than specified value when engine is running at high speed or
under high loading. Then the ECM turns oil pressure warning lamp
ON.
System Description
Malfunction is detected when...ConditionOil pressure
warning lamp
Engine oil pressure switch-1 Engine oil amount is too low.
IEngine is running. ON
Except above condition OFF
Engine oil pressure switch-2 An excessively high voltage is sent
to the ECM.
I
Ignition switch: ON
(Engine stopped)
I Engine is running ON
Engine oil amount is below low level
for running engine at high speed. More than 5 seconds when the fol-
lowing conditions are met
I
Engine: After warming-up [Below
95ÉC (203ÉF)]
I Engine speed: 3,600 - 4,200 rpm
I Engine oil pressure switch-2: ON ON
Except above condition OFF
NOTE:
Oil pressure warning lamp is not turned OFF until ignition switch is turned OFF when turning ON during engine run-
ning.
If the test is performed again, always perform the test after turning ignition switch OFF.
SEC382D
ENGINE OIL PRESSURE SWITCHZD30DDTi
EC-297
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ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TERMINALNO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
6 Y Oil pressure warning lamp [Ignition switch ªONº]
I
Oil pressure warning lamp is
illuminated Approximately 0V
[Engine is running]
I Oil pressure warning lamp is
not illuminated Battery voltage (12 - 14V)
27 R/L Engine oil pressure switch-2 [Ignition switch ªONº] Approximately 0V
[Engine is running]
I
Engine speed is 3,600 rpm Battery voltage (12 - 14V)
ENGINE OIL PRESSURE SWITCHZD30DDTi
EC-298
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Wiring Diagram
LHD MODELS
YEC667A
ENGINE OIL PRESSURE SWITCHZD30DDTi
EC-299
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RHD MODELS
YEC668A
ENGINE OIL PRESSURE SWITCHZD30DDTi
Wiring Diagram (Cont'd)EC-300
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Diagnostic Procedure
1 OVERALL FUNCTION CHECK-I
1. Turn ignition switch ªONº.
2. Check oil pressure warning lamp in combination meter illumination.Oil pressure warning lamp should illuminate after turning ignition switch ªONº immediately.
OK or NG
OK EGO TO 2.
NG EGO TO 8.
2 CHECK ENGINE OIL LEVEL
1. Turn ignition switch ªOFFº.
2. Check engine oil level.
SMA885BEngine oil level: Between L and H
OK or NG
OK EGO TO 4.
NG EGO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
ICheck area around drain plug and oil filter for oil leakage.
I Check area around cylinder block oil gallery.
EIf NG, repair or replace. Refer to EM and LC sections.
4 OVERALL FUNCTION CHECK-II
1. Turn ignition switch ªONº and wait at least 3 seconds.
2. Start engine and let it idle.
3. Check oil pressure warning lamp illumination.
Oil pressure warning lamp should go off.
OK or NG
OK EGO TO 5.
NG EGO TO 14.
5 OVERALL FUNCTION CHECK-III
1. Warm up engine to the normal operating temperature.
2. Keep engine speed between 3,600 to 4,200 rpm at least 30 seconds.
3. Check oil pressure warning lamp illumination.
Oil pressure warning lamp should not illuminate.
OK or NG
OK EGO TO 6.
NG EGO TO 24.
ENGINE OIL PRESSURE SWITCHZD30DDTi
EC-301
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6 CHECK ECM OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Disconnect combination meter harness connector.
4. Check harness continuity between ECM terminal 6 and combination meter terminal 16.Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground or short to power.
OK or NG
OK EINSPECTION END
NG EGO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
IHarness for open or short between ECM and combination meter
ERepair open circuit or short to ground or short to power in harness or connectors.
8 CHECK COMBINATION METER POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect combination meter harness connector.
3. Turn ignition switch ªONº.
4. Check voltage between combination meter terminal 28 and ground.
YEC701AVoltage: Battery voltage
OK or NG
OK EGO TO 10.
NG EGO TO 9.
ENGINE OIL PRESSURE SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-302
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9 DETECT MALFUNCTIONING PART
Check the following.
I10A fuse
I Fuse block (J/B) connector F48 (LHD models)
I Fuse block (J/B) connector M756 (RHD models)
I Harness for open or short between combination meter and fuse block
ERepair open circuit or short to ground or short to power in harness or connectors.
10 CHECK ENGINE OIL PRESSURE SWITCH-1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect engine oil pressure switch-1 harness connector.
3. Check harness continuity between combination meter terminal 16 and engine oil pressure switch-1 terminal 1.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK EGO TO 12.
NG EGO TO 11.
11 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors F108, E225
I Harness connectors M842, F135 (RHD models)
I Harness for open or short between combination meter and engine oil pressure switch-1
ERepair open circuit or short to power in harness or connectors.
ENGINE OIL PRESSURE SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-303
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12 CHECK COMBINATION METER
Check combination meter continuity between the following terminals. Refer to Wiring Diagram.
MTBL1798
YEC702A
OK or NG
OK EGO TO 13.
NG ERepair or replace combination meter. Refer to EL section.
13 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-78.
OK EReplace engine oil pressure switch-1.
NG ERepair harness or connectors.
14 OVERALL FUNCTION CHECK-IV
1. Turn ignition switch ªOFFº.
2. Disconnect engine oil pressure switch-1 harness connector.
3. Turn ignition switch ªONº and wait at least 3 seconds.
4. Start engine and let it idle.
5. Check oil pressure warning lamp illumination.
Oil pressure warning lamp should go off.
OK or NG
OK EReplace engine oil pressure switch-1.
NG EGO TO 15.
ENGINE OIL PRESSURE SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-304
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15 CHECK ENGINE OIL PRESSURE SWITCH-1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº and then ªONº.
2. Check voltage between engine oil pressure switch-1 terminal 1 and ground with CONSULT-II or tester.
SEC976DVoltage: Battery voltageOK or NG
OK EGO TO 17.
NG EGO TO 16.
16 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors F108, E225
I Harness connectors M842, F135 (RHD models)
I Harness for short between combination meter and engine oil pressure switch-1
ERepair harness or connectors.
17 CHECK ECM OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Turn ignition switch ªONº.
4. Check voltage between ECM terminal 6 and ground with CONSULT-II or tester.
SEC977D
Voltage: Battery voltage
OK or NG
OK EGO TO 19.
NG EGO TO 18.
18 DETECT MALFUNCTIONING PART
Check the following.
IHarness for short between combination meter and ECM
ERepair harness or connectors.
ENGINE OIL PRESSURE SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-305
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19 CHECK ENGINE OIL PRESSURE SWITCH-2 INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect engine oil pressure switch-2 harness connector.
3. Turn ignition switch ªONº.
4. Check voltage between engine oil pressure switch-2 terminal 1 and ground with CONSULT-II or tester.
SEC976D
Voltage: Battery voltageOK or NG
OK EGO TO 21.
NG EGO TO 20.
20 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M807, E201
I Harness connectors F120, M812 (LHD models)
I Resistor
I 10A fuse
I Fuse block (J/B) connector F48 (LHD models)
I Fuse block (J/B) connector M756 (RHD models)
I Harness for open between engine oil pressure switch-2 and fuse
ERepair harness or connectors.
21 CHECK ECM INPUT SIGNAL CIRCUIT-I
Check voltage between ECM terminal 27 and ground with CONSULT-II or tester.
SEC388DVoltage: Battery voltage
OK or NG
OK EGO TO 23.
NG EGO TO 22.
ENGINE OIL PRESSURE SWITCHZD30DDTi
Diagnostic Procedure (Cont'd)
EC-306
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