2001 NISSAN PICK-UP Repair Manual

Diagnostic Procedure
1 INSPECTION START
Check fuel level, fuel supplying system, starter motor, etc.
OK or NG
OKcGO TO 2.
NGcCorrect.
2 CHECK INSTALLATION
Check that all glow plug connecting plate nuts are installed properly.
SEC250D
OK or NG
OK (With CONSULT-II)cGO TO 3.
OK (Without CONSULT-II)cGO TO 4.
NGcInstall properly.
3 CHECK GLOW INDICATOR LAMP OPERATION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Select ªCOOLAN TEMP/Sº in ªDATA MONITORº mode with CONSULT-II.
3. Confirm that ªCOOLAN TEMP/Sº indicates below 75ÉC (167ÉF). If it indicates above 75ÉC (167ÉF), cool down engine.
SEF013Y
4. Turn ignition switch ªOFFº, wait at least 5 seconds and then turn ªONº.
5. Make sure that glow indicator lamp is turned ªONº for 1.5 seconds or more after turning ignition switch ªONº, and then turned
ªOFFº.
OK or NG
OKcGO TO 5.
NGcGO TO 6.
4 CHECK GLOW INDICATOR LAMP OPERATION
GLOW CONTROL SYSTEMYD25DDTi
EC-3624

Without CONSULT-II
1. Turn ignition switch ªONº.
2. Confirm that the voltage between ECM terminal 19 and ground is above 1.36V. If it is below 1.36V, cool down engine.
SEF430Y
3. Turn ignition switch ªOFFº, wait at least 5 seconds and then turn ªONº.
4. Make sure that glow indicator lamp is turned ªONº for 1.5 seconds or more after turning ignition switch ªONº, and then turned
ªOFFº.
OK or NG
OKcGO TO 5.
NGcGO TO 6.
5 CHECK GLOW CONTROL SYSTEM OVERALL FUNCTION
1. Turn ignition switch ªOFFº.
2. Set voltmeter probe between glow plug and engine body.
3. Turn ignition switch ªONº.
4. Check the voltage between glow plug and engine body under the following conditions.
SEC251D
OK or NG
OKcINSPECTION END
NGcGO TO 11.
GLOW CONTROL SYSTEMYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3625

6 CHECK GLOW INDICATOR LAMP POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect combination meter harness connector N4 (With tachometer) or N10 (Without tachometer).
3. Turn ignition switch ªONº.
4. Check voltage between combination meter terminal 17 (N4) or 22 (N10) and ground with CONSULT-II or tester.
SEC252D
OK or NG
OKcGO TO 8.
NGcGO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
1. Harness connectors M7, N2
2. 10A fuse
3. Harness for open or short between combination meter and fuse
cRepair open circuit or short to ground or short to power in harness or connectors.
8 CHECK GLOW INDICATOR LAMP OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Disconnect combination meter harness connector N6 or N11.
4. Check harness continuity between ECM terminal 16 and combination meter terminal 67 (N6) or 55 (N11). Refer to Wiring Dia-
gram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 10.
NGcGO TO 9.
9 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors N2, M7
+Harness connector M48, F54 (RHD models)
+Harness for open or short between combination meter and ECM
cRepair open circuit or short to ground or short to power in harness or connectors.
GLOW CONTROL SYSTEMYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3626

10 CHECK COMBINATION METER
Check combination meter and glow indicator lamp. Refer to EL section (ªMETER AND GAUGESº).
OK or NG
OKcGO TO 19.
NGcRepair or replace combination meter or glow indicator lamp.
11 CHECK GLOW RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect glow relay.
SEC965C
3. Check voltage between glow relay terminals 1, 3 and ground with CONSULT-II or tester.
SEF451Z
OK or NG
OKcGO TO 13.
NGcGO TO 12.
12 DETECT MALFUNCTIONING PART
Check the following.
+60A fusible link
+Harness for open or short between glow relay and battery
cRepair harness or connectors.
GLOW CONTROL SYSTEMYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3627

13 CHECK GLOW RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 111 and glow relay terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 15.
NGcGO TO 14.
14 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E101, M5
+Harness connectors M48, F54 (RHD models)
+Harness for open or short between glow relay and ECM
cRepair open circuit or short to ground or short to power in harness or connectors.
15 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.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 16.
NGcRepair open circuit or short to ground or short to power in harness or connectors.
16 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E72, E232
+Harness for open or short between glow relay and glow plug
cRepair open circuit or short to ground or short to power in harness or connectors.
17 CHECK GLOW RELAY
Check continuity between glow relay terminals 3 and 5 under the following conditions.
SEF433Y
OK or NG
OKcGO TO 18.
NGcReplace glow relay.
GLOW CONTROL SYSTEMYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3628

18 CHECK GLOW PLUG
1. Remove glow plug connecting plate.
2. Check glow plug resistance.
SEC253D
NOTE:
+Do not bump glow plug heating element. If it is bumped, replace glow plug with a new one.
+If glow plug is dropped from a height of 0.1 m (3.94 in) or higher, replace with a new one.
+If glow plug installation hole is contaminated with carbon, remove it with a reamer or suitable tool.
+Hand-tighten glow plug by turning it two or three times, then tighten using a tool to specified torque.
: 1.4 - 2.2 Nzm (0.15 - 0.22 kg-m, 13 - 19 in-lb)
OK or NG
OKcGO TO 19.
NGcReplace glow plug.
19 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-3469.
cINSPECTION END
GLOW CONTROL SYSTEMYD25DDTi
Diagnostic Procedure (Cont'd)
EC-3629

Wiring Diagram
GEC148A
START SIGNALYD25DDTi
EC-3630

Diagnostic Procedure
1 CHECK START SIGNAL OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Check ªSTART SIGNALº in ªDATA MONITORº mode with CONSULT-II under the following conditions.
SEC254D
Without CONSULT-II
Check voltage between ECM terminal 20 and ground under the following conditions.
SEF415Y
OK or NG
OKcINSPECTION END
NGcGO TO 2.
2 CHECK START SIGNAL INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector and ignition switch harness connector.
3. Check harness continuity between ECM terminal 20 and ignition switch terminal 6. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OKcGO TO 4.
NGcGO TO 3.
START SIGNALYD25DDTi
EC-3631