NISSAN TERRANO 2004 Service Repair Manual

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 terminal q
2,q3and
engine ground.
Voltage: Battery voltage
OK
ENG Check the following:
I10A fuse
I Harness 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-
minal q
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)
I Harness 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-466
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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
DTCMalfunction is detected when ... Check Items (Possible Cause)
P1603
0901 I
ECM 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-467
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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-467 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-467 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-468
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On Board Diagnosis Logic
DTCMalfunction is detected when .... Check Items (Possible Cause)
P1620
0902 I
An irregular voltage signal from the ECM relay is sent
to ECM. I
Harness or connectors
(ECM relay circuit is open or shorted.)
I ECM 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 thenturn ªONº.
3) Perform ªDiagnostic Test Mode II (Self-diagnostic results)º with ECM.
SEF817Y
DTC P1620 ECM RLYTD27Ti
EC-469
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Wiring Diagram
YEC687A
DTC P1620 ECM RLYTD27Ti
EC-470
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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
I Harness 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 terminal q
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)
I Harness 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)
I Harness 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 terminals q
1andq2.
2. Check continuity between ECM relay terminals q
3andq5.
12V ( q
1-q2) applied: Continuity
shouldexist
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-471
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Wiring Diagram
YEC153A
START SIGNALTD27Ti
EC-472
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Diagnostic Procedure
INSPECTION START
CHECK OVERALL FUNCTION.
1. Turn ignition switch to ªONº posi-tion.
2. Check ªSTART SIGNALº in ªDATA MONITORº mode with CONSULT-
II.
------------------------------------------------------------------------------------------------------------------------------------- -OR--------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to ªSTARTº
position.
2. Check voltage between ECM con- nector terminal
422and engine
ground.
Voltage: Ignition switch ªSTARTº:Battery voltage
Except above: Approximately 0V
NG
EOK INSPECTION END
Check if 40A fusible link is OK.
OKENGReplace 40A fusible link.
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect ECM harness connector, ignition switch connector.
3. Check harness continuity between ECM connector terminal
422and ignition
switch connector terminal q
5. Refer to
wiring diagram.
Continuity should exist.
If OK, check harness for short circuit.
OK
ENG Check the following:
I Harness connectors
M787,F66(LHD mod-
els)
I Condition and operations
of ignition switch
I Harness for open or
short-circuit between
ECM and ignition switch
If NG, repair ignition
switch, harness or con-
nectors.
Disconnect and reconnect harness connec-
tors in the circuit. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage and
check the connection of ECM harness con-
nector. Reconnect ECM harness connector
and retest.
INSPECTION END
IGN ªONº OFF
IGN ªSTARTº ON
PBIB0763E
MEC966D
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START SIGNALTD27Ti
EC-473
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Wiring Diagram
YEC162A
OIL PRESSURE SWITCHTD27Ti
EC-474
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Wiring Diagram
YEC688A
MI & DATA LINK CONNECTORSTD27Ti
EC-475
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