NISSAN TERRANO 2002 Service Repair Manual

Component Inspection
E G R VA LV E
Apply vacuum to EGR vacuum port with a hand vacuum pump.
EGR valve diaphragm should lift.
If NG, replace EGR valve.
THROTTLE CONTROL VALVE
Apply vacuum to throttle control valve vacuum port with a hand
vacuum pump.
Throttle control valve should close.
If NG, replace throttle control valve.
EGRC-SOLENOID VALVE A, B AND THROTTLE
CONTROL SOLENOID VALVE
Check air passage continuity.
Component Applied voltageAir passage continuity
between portsqAandqB
EGRC-
solenoid
valve A12V dc between terminals
q1&q4...........................
No supplyYES
...........................
NO
EGRC-
solenoid
valve B12V dc between terminals
q
2&q5...........................
No supplyYES
...........................
NO
Throttle control
solenoid
valve A12V dc between terminals
q
3&q6...........................
No supplyYES
...........................
NO
If NG, replace EGRC-solenoid valve A, B and throttle control sole-
noid valve.
MEF137D
NEF514
NEF515
NEF517
NEF518
DTC P1404 EGR SOL/V A, DTC P1405 EGR SOL/V B/P1407
THROTTLE SOLENOID VALVETD27Ti
EC-439

Component Description
AIR CONDITIONER CUT CONTROL
Air conditioner is cut under the following conditions:
IStarting engine
IQuick acceleration from low speed
IUndershooting of idle speed
IHigh engine coolant temperature [above 107ÉC (225ÉF)]
IMalfunctioning of engine speed sensor, accelerator position sen-
sor or vehicle speed sensor when engine speed is below 2,100
rpm.
On Board Diagnosis Logic
DTC Malfunction is detected when ....Check Items
(Possible cause)
P1530
0805IAir conditioner relay signal circuit is shorted.IHarness or connectors
(The air conditioner relay signal circuit is shorted.)
IAir conditioner relay
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch and air conditioner switch to ªONº position.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Wait at least 2 seconds.
WITHOUT CONSULT-II
1) Turn ignition switch and air conditioner switch to ªONº position.
Wait at least 2 seconds.
2) Turn ignition switch to ªLOCKº position, wait at least 5 seconds
and then turn to ªONº position.
3) Perform ªDiagnostic Test Mode IIº (Self-diagnostic results).
DTC P1530 AIR CONDITIONER RLYTD27Ti
EC-440

Wiring Diagram
LHD MODELS
YEC154A
DTC P1530 AIR CONDITIONER RLYTD27Ti
EC-441

RHD MODELS
YEC155A
DTC P1530 AIR CONDITIONER RLYTD27Ti
Wiring Diagram (Cont'd)
EC-442

Diagnostic Procedure
INSPECTION START
(Air conditioner relay signal circuit)
CHECK POWER SUPPLY.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect air conditioner relay har-
ness connector.
3. Check voltage between air conditioner
relay connector terminalq
2,q3and
engine ground.
Voltage: Battery voltage
OK
ENG
Check the following:
I10A fuse
IHarness for open or
short between fuse block
and A/C relay
If NG, replace or repair the
parts attached.
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect ECM harness connector.
3.Check harness continuity between ECM
harness connector terminal
204and air
conditioner relay harness connector ter-
minalq
1. Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short-
circuit.
OK
ENG
Check the following:
IHarness connectors
M812,F120(LHD mod-
els)
IHarness for open or
short-circuit between
ECM and air conditioner
relay.
If NG, repair harness or
connectors.
CHECK AIR CONDITIONER RELAY.
Refer to HA section for inspection.
OK
ENG
Replace air conditioner
relay.
Disconnect and reconnect harness
connectors in the circuit. Then retest.
Trouble is not fixed
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
NEF512
PBIB0185E
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DTC P1530 AIR CONDITIONER RLYTD27Ti
EC-443

Description
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the engine.
On Board Diagnosis Logic
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1603
0901IECM calculation function is malfunctioning.IECM
P1607
0301
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Start engine and wait at least 2 seconds.
WITHOUT CONSULT-II
1) Turn ignition switch ªONº and wait at least 2 seconds.
2) Start engine and wait at least 2 seconds.
3) Turn ignition switch ªOFFº, wait at least 5 seconds and then turn
ªONº.
4) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with
ECM.
SEC220B
SEF817Y
DTC PD1603 ECM 12, DTC P1607 ECM2TD27Ti
EC-444

Diagnostic Procedure
INSPECTION START
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªSELF DIAG RESULTSº mode
with CONSULT-II.
3. Touch ªERASEº.
4. Perform ªDTC Confirmation Procedureº,
EC-444 again.
5. Is the DTC P1603 or P1607 displayed
again?
Without CONSULT-II
1. Turn ignition switch ªONº.
2. Erase the Diagnostic Test Mode II (Self-
diagnostic results) memory.
3. Perform ªDTC Confirmation Procedureº,
EC-444 again.
4. Perform ªDiagnostic Test Mode II (Self-
diagnostic results)º.
5. Is the DTC 0301 or 0901 displayed
again?
No
EYe s
Replace ECM.
INSPECTION END
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DTC PD1603 ECM 12, DTC P1607 ECM2TD27Ti
EC-445

On Board Diagnosis Logic
DTC Malfunction is detected when .... Check Items (Possible Cause)
P1620
0902IAn irregular voltage signal from the ECM relay is sent
to ECM.IHarness or connectors
(ECM relay circuit is open or shorted.)
IECM relay
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Turn ignition switch ªOFFº, wait at least 20 seconds and then
turn ªONº.
WITHOUT CONSULT-II
1) Turn ignition switch ªONº.
2) Turn ignition switch ªOFFº, wait at least 20 seconds and then
turn ªONº.
3) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with
ECM.
SEF817Y
DTC P1620 ECM RLYTD27Ti
EC-446

Wiring Diagram
YEC250A
DTC P1620 ECM RLYTD27Ti
EC-447

Diagnostic Procedure
INSPECTION START
CHECK ECM POWER SUPPLY CIRCUIT.
1. Turn ignition switch ªOFFº.
2. Disconnect ECM relay.
3. Check voltage between ECM terminals
q
1,q3and ground with CONSULT-II or
tester.
Voltage: Battery voltage
OK
ENG
Check the following.
I20A fuse
IHarness for open and
short between ECM
relay and battery
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK ECM INPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM
terminals
107,108,109and ECM
relay terminalq
5. Refer to Wiring Dia-
gram.
Continuity should exist.
4. Also check harness for short to ground
and short to power.
OK
ENG
Check the following.
IHarness connectors
M787,F66(LHD mod-
els)
IHarness for open or
short between ECM
relay and ECM
If NG, repair harness or
connectors.
CHECK ECM OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT.
1. Check harness continuity between ECM
terminal
325and ECM relay terminal
q
2. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground
and short to power.
OK
ENG
Check the following.
IHarness connectors
M787,F66(LHD mod-
els)
IHarness for open or
short between ECM
relay and ECM
If NG, repair harness or
connectors.
CHECK ECM RELAY
1. Apply 12V direct current between ECM
relay terminalsq
1andq2.
2. Check continuity between ECM relay
terminalsq
3andq5.
12V (q
1-q2) applied: Continuity should
exist
No voltage applied: No continuity
OK
ENG
Replace ECM relay.
Check ECM pin terminals for damage and
check the connection of ECM harness
connector.
INSPECTION END
YEC283A
MEC945D
NEF350
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DTC P1620 ECM RLYTD27Ti
EC-448