2001 NISSAN X-TRAIL diagram

DTC P1621 ECM RELAY
EC-1539
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS008ZC
TBWA0121E

DTC P1621 ECM RELAY
EC-1541
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
4.CHECK ECM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals D24, D26 and ECM relay terminal 2. Refer to Wiring
Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK ECM RELAY
Refer to EC-1541, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace ECM relay.
6.CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS008ZD
ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5, 6 and 7.
3. If NG, replace ECM relay.Continuity should exist.
Condition Continuity
12V direct current supply between ter-
minals 1 and 2Ye s
OFF No
PBIB0077E

GLOW CONTROL SYSTEM
EC-1545
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS0035L
TBWA0108E

EC-1548
[YD]
GLOW CONTROL SYSTEM
7. CHECK GLOW INDICATOR LAMP OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal D2 and combination meter terminal 65 (LHD models) or
55 (RHD models). Refer to Wiring Diagram.
4. 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 M63, F30
●Harness for open or short between combination meter and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK COMBINATION METER
Check combination meter and glow indicator lamp. Refer to DI-4, "
COMBINATION METERS (LHD MODELS)"
or DI-24, "COMBINATION METERS (RHD MODELS)" and DI-43, "WARNING LAMPS" .
OK or NG
OK >> GO TO 17.
NG >> Repair or replace combination meter or glow indicator lamp.
10. CHECK GLOW RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect glow relay.
3. Check voltage between glow relay terminals 1, 3 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.Continuity should exist.
PBIB0373E
Voltage: Battery voltage
PBIB1413E

GLOW CONTROL SYSTEM
EC-1549
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
11 . DETECT MALFUNCTIONING PART
Check the following.
●60A fusible link
●Harness for open or short between glow relay and battery
>> Repair harness or connectors.
12.CHECK GLOW RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal E9 and glow relay terminal 2. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> GO TO 13.
13.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E63, F4
●Harness for open or short between glow relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK HARNESS CONTINUITY BETWEEN GLOW RELAY AND GLOW PLUG FOR OPEN AND
SHORT
1. Disconnect glow plug harness connector.
2. Check harness continuity between glow relay terminal 5 and glow plug harness connector. Refer to Wiring
Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 15.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
15.CHECK GLOW RELAY
Refer to EC-1550, "
Component Inspection" .
OK or NG
OK >> GO TO 16.
NG >> Replace glow relay.
16.CHECK GLOW PLUG
Refer to EC-1550, "
Component Inspection" .
OK or NG
OK >> GO TO 17.
NG >> Replace glow plug.Continuity should exist.
Continuity should exist.

EGR VOLUME CONTROL SYSTEM
EC-1553
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS0035Q
TBWA0109E

EC-1556
[YD]
EGR VOLUME CONTROL SYSTEM
7. CHECK EGR VOLUME CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals and EGR volume control valve terminals as follows.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK EGR VOLUME CONTROL VALVE
Refer to EC-1556, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace EGR volume control valve.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS003Q0
EGR VOLUME CONTROL VALVE
With CONSULT-II
1. Disconnect EGR volume control valve harness connector.
ECM terminal EGR volume control valve terminal
B3 4
B4 3
B5 6
B6 1
Continuity should exist.
PBIB0380E

BRAKE SWITCH
EC-1559
[YD]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS009K0
TBWA0106E