Page 77 NISSAN PATROL 1998 Y61 / 5.G Electrical System Workshop Manual

Trouble Diagnoses
PRELIMINARY CHECK FOR THERMOMETER
Turn the ignition key switch to the ``ACC''
position.
Cool down the ambient air temperature
sensor with water or ice, so that the indi-
cated temperature falls.
Does the indicated temperature fall?
Ye s
cNo
The system is malfunction-
ing..1
Leave the vehicle for 10 minutes, so that
the indicated temperature rises.
With the ignition key in the ``ACC''
position, disconnect and reconnect the
ambient air temperature sensor connector.
Does the indicated temperature rise?
Ye s
cNo
The system is malfunction-
ing..1
The system is OK.
.1: Check the system following ``INSPECTION/COMPASS AND THERMOM-
ETER''.
INSPECTION/COMPASS AND THERMOMETER
Symptom Possible causes Repair order
No display at all 1. 7.5A fuse
2. Ground circuit
3. Compass and thermometer1. Check 7.5A fuse [No.
9, located in fuse block (J/B)].
Turn the ignition switch ON and verify that battery positive
voltage is at terminalj
2of compass and thermometer.
2. Check ground circuit for compass and thermometer.
3. Replace compass and thermometer.
Forward direction indication
slips off the mark or incorrect.1. In manual correction mode
(Bar and display vanish.)
2. Zone variation change is not
done.1. Drive the vehicle and turn at an angle of 90É.
2. Perform the zone variation change.
Compass reading remains
unchanged.1. Vehicle speed sensor is not
entered.
2. Compass and thermometer1. Check harness for open or short between combination meter
terminalj
26and compass and thermometer terminalj8.
2. Replace compass and thermometer.
Displays wrong temperature
when ambient temperature is
between þ30ÉC (þ20ÉF) and
55ÉC (130ÉF). (See NOTE)1. Check operation
2. Ambient air temperature
sensor circuit
3. Vehicle speed sensor is not
entered.
4. Ambient air temperature
sensor
5. Compass and thermometer1. Perform preliminary check shown below.
2. Check harness for open or short between ambient air tem-
perature sensor and compass and thermometer.
3. Check harness for open or short between combination meter
terminalj
26and compass and thermometer terminalj8.
4. Replace ambient air temperature sensor.
5. Replace compass and thermometer.
NOTE:
+When the outside temperature is between 55ÉC (130ÉF) and 70ÉC (158ÉF), the display shows 55ÉC
(130ÉF). When the outside temperature is lower than þ30ÉC (þ20ÉF) or higher than 70ÉC (158ÉF), the
display shows only ``- - -''.
+The indicated temperature on the thermometer is not readily affected by engine heat. It changes
only when one of the following conditions (shown on next page) is present.
.
.
.
.
.
.
COMPASS AND THERMOMETER
EL-118

a) The temperature detected by the ambient air temperature sensor is lower than the indicated tem-
perature on the thermometer.
b) The difference in temperature detected during a period of 40 seconds is less than 1ÉC (1.8ÉF) when
vehicle speed has been greater than 24 km/h (15 MPH) for more than 100 seconds.
(This is to prevent the indicated temperature from being affected by engine heat or cooling fan
operation during low-speed driving.)
c) The ignition key has been turned to the ``OFF'' position for more than 4 hours. (The engine is cold.)
Calibration Procedure For Compass
The difference between magnetic North and geographical North
can sometimes be great enough to cause false compass readings.
In order for the compass to operate accurately in a particular zone,
it must be calibrated using the following procedure.
1. Determine your location on the worldwide magnetic variation
map on next page. Record your zone number.
2. Turn the ignition switch to ACC or ON position.
3. Push the ``Mode'' switch continuously for ®ve seconds until the
current zone entry number is displayed.
4. Press the ``Mode'' switch repeatedly until the desired zone num-
ber is displayed.
Once the desired zone number is displayed, stop pressing the
``Mode'' switch and the display will show compass direction after a
few seconds.
CORRECTION FUNCTIONS OF COMPASS
The direction display is equipped with automatic correction func-
tion. If the direction is not shown correctly, carry out initial correc-
tion.
INITIAL CORRECTION PROCEDURE FOR COMPASS
1. Pushing the ``Mode'' switch for about 10 seconds will enter the
initial correction mode. The direction bar starts blinking.
2. Turn the vehicle slowly in an open, safe place. The initial cor-
rection is completed in one or two turns.
NOTE:
In places where the terrestrial magnetism is extremely
disturbed, the initial correction may start automatically.
SEL065V
COMPASS AND THERMOMETER
Trouble Diagnoses (Cont'd)
EL-119

Trouble Diagnoses
SYMPTOM CHART
REFERENCE PAGE EL-138 EL-139 EL-139
SYMPTOM
DIAGNOSTIC PROCEDURE 1
(Lighting switch input signal check)
DIAGNOSTIC PROCEDURE 2
(Key switch input signal check)
DIAGNOSTIC PROCEDURE 3
Light warning chime does not acti-
vate.XX
Ignition key warning chime does not
activate.XX
All warning chimes do not activate.X
DIAGNOSTIC PROCEDURE 1
(Lighting switch input signal check)
CHECK LIGHTING SWITCH INPUT SIG-
NAL.
Check voltage between control unit termi-
nalj
14and ground.
OK
cNG
Check the following.
+7.5A fuse (No.
42,
located in the fuse and
fusible link box) for LHD
models
+Harness for open or
short between control
unit and lighting switch/
daytime light control unit
Go to DIAGNOSTIC PROCEDURE 3.
Condition of lighting
switchVoltage [V]
1ST or 2ND Approx. 12
OFF 0
SEL851UB
.
WARNING CHIME
EL-138

Trouble Diagnosis
SYMPTOM CHART
REFERENCE PAGE EL-207 EL-208 EL-209 EL-210
SYMPTOM
MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK
DIAGNOSTIC PROCEDURE 1
(Door lock/unlock switch check)
DIAGNOSTIC PROCEDURE 2
(Door lock actuator check)
DIAGNOSTIC PROCEDURE 3
(Driver side door lock switch check)
None of the doors lock/unlock when operat-
ing any switch.XX
One or more doors are not locked and/or
unlocked.X
Door lock/unlock switch does not operate. X
Door knob lock switch/key cylinder on driv-
er's door does not operate.X
Driver side door does not lock/unlock when
operating remote controller. (With multi-re-
mote control system)X
POWER SUPPLY AND GROUND CIRCUIT CHECK
Power supply circuit check
Terminal Ignition switch
Å@OFF ACC ON
j
11GroundBattery
voltageBattery
voltageBattery
voltage
Ground circuit check
Terminals Continuity
j
18- Ground Yes
SEL860UB
SEL854UD
POWER DOOR LOCK
EL-207

Trouble Diagnoses
PRELIMINARY CHECK
CHECK-IN
Open all windows and remove
key from ignition key cylinder.
Does power door lock operate
properly?
Ye s
cNo (All doors)
Power door lock does not operate by using;
Ð any switch.
...........................................................................
Ð driver side lock knob switch and/or key cyl-
inder.
...........................................................................
Ð passenger side lock knob switch and/or key
cylinder..
cSYMPTOM 1
cSYMPTOM 2
cSYMPTOM 3
cNo (Speci®c door)
SYMPTOM 4
Does super lock set by using
door key cylinder?
Ye s
cNo (All doors)
Super lock does not set by using;
Ð both door key cylinders.
...........................................................................
Ð one of door key cylinders.
cSYMPTOM 5
cSYMPTOM 6
cNo (Speci®c door)
SYMPTOM 9
Does super lock release by using
door key cylinder or IGN key
switch?
Ye s
cNo (All doors)
Super lock does not release by using;
Ð one or both door key cylinders.
...........................................................................
Ð IGN key switch.
(Signal from NATS IMMU)
cSYMPTOM 7
cSYMPTOM 8
cNo (Speci®c door)
SYMPTOM 9
Does super lock set/release by
using multi-remote controller?
(If equipped)
Ye s
cNo
Does multi-remote control system operate
properly?cYe s
SYMPTOM 11
cNo
Check ``MULTI-
REMOTE
CONTROL''
system.
Insert key to ignition key cylinder,
open any door and lock the door
using driver or passenger side
knob lock switch.
Does key reminder system oper-
ate properly?
Ye s
cNo
SYMPTOM 10
INSPECTION END
After performing preliminary check, go to symptom chart on the next page.
.When one or more doors are opened, with lock knob on passenger door setting to LOCK, will lock pas-
senger door only. (Power door lock system will not operate.)
.
.
.
.
.
.
.
.
POWER DOOR LOCK Ð Super Lock Ð
EL-223

Before starting trouble diagnoses below, perform preliminary check, EL-223.
Symptom numbers in the symptom chart correspond with those of Preliminary check.
SYMPTOM CHART
REFERENCE PAGE EL-225 EL-226 EL-227 EL-228 EL-229 EL-230 EL-231 EL-232 EL-232 EL-233
SYMPTOM
Power supply and ground circuit check
Procedure 1
(Door unlock sensor check)
Procedure 2
(Door key cylinder switch check)
Procedure 3
(Door lock actuator check)
Procedure 4
(Super lock actuator check)
Procedure 5
(Door switch check)
Procedure 6
(NATS release signal check)
Procedure 7
(Key switch check)
Procedure 8
(Ignition switch ``ON'' circuit check)
Procedure 9
(Remote controller signal check)
1Power door lock does not operate
using any switch.XX X
2Power door lock does not operate
with any switch of driver side.X
3Power door lock does not operate
with any switch of passenger side.XX
4Speci®c door lock actuator does not
operate.X
5Super lock cannot be set by both
door key cylinders.XXX XX
6Super lock cannot be set by one of
door key cylinders.X
7*Super lock cannot be released by
one or both door key cylinders.X
8*Super lock cannot be released by
ignition key switch. (Signal from
NATS IMMU)X
9Speci®c super lock actuator does not
operate.X
10*Key reminder system does not
operate.XX
11Super lock cannot be set/released
by using multi-remote controller.X
X: Applicable
*: Make sure the power door lock system operates properly.
POWER DOOR LOCK Ð Super Lock Ð
Trouble Diagnoses (Cont'd)
EL-224

Trouble Diagnoses
SYMPTOM CHART
Symptom Possible cause Diagnoses/service order
No doors can be
locked or unlocked
by remote control
operation.Hazard reminder
also does not oper-
ate either.1. Remote controller battery
2. Key switch (insert)
3. Door switch
4. Power supply circuit for multi-
remote control unit
5. Ground circuit for multi-remote
control unit
6. Remote controller1. Check remote controller battery. Refer to EL-238.
2. Check key switch (insert) signal at terminalj
7of
multi-remote control unit.
3. Check door switch signal at terminalsj
1and
j
2of multi-remote control unit.
4. Make sure battery voltage is present at
terminalj
3of multi-remote control unit.
5. Check continuity between terminalj
5of multi-re-
mote control unit and ground.
6. Replace remote controller. Refer to EL-239.
Hazard reminder
operates properly.1. Super lock system
2. Lock/unlock signal to super
lock control unit1. Check that power door lock operates properly. If
NG, check super lock, EL-211.
2. Check lock/unlock signal to super lock control unit
at terminalsj
10andj11of multi-remote control unit.
(See NOTE.)
Hazard reminder does not operate properly. 1. 10A fuse
2. Multi-remote control relay-1
and 2
3. Hazard reminder circuit1. Check 10A fuse (No.
48, located in the fuse and
fusible link box).
2. Check multi-remote control relay-1 and 2.
3. Check harness for open or short between relays
and multi-remote control unit terminalj
12.
The new ID of remote controller
cannot be entered.1. Remote controller battery
2. Key switch (insert)
3. Door switch
4. Driver's door unlock sensor
5. Accessory power supply circuit
for multi-remote control unit
6. Remote controller1. Check remote controller battery. Refer to EL-238.
2. Check key switch (insert) signal at terminalj
7of
multi-remote control unit.
3. Check door switch signal at terminalsj
1andj2
of multi-remote control unit.
4. Check driver's door unlock sensor signal at termi-
nalj
6of multi-remote control unit.
5. Make sure battery voltage is present at terminal
j
8of multi-remote control unit while ignition
switch is in ACC position.
6. Replace remote controller. Refer to EL-239.
Refer to ``MULTI-REMOTE CONTROL UNIT INSPECTION TABLE'' on next page to check the control unit
signals.
NOTE:
+The unlock operation of multi-remote control system does not activate with key inserted in the ignition key
cylinder.
+The lock operation of multi-remote controller does not activate with the key inserted ignition key cylinder
or if one of the door is opened.
MULTI-REMOTE CONTROL SYSTEM
EL-237

CONSULT DIAGNOSTIC TEST MODE FUNCTION
CONSULT DIAGNOSTIC TEST
MODEDescription
C/U INITIALIZATION When replacing any of the following three components, C/U initialization is necessary.
[NATS ignition key/IMMU/ECM]
SELF-FUNCTION CHECK ECM checks its own NATS communication interface by itself.
SELF-DIAGNOSTIC RESULTS Detected items (screen terms) are as shown in the chart below.
NOTE:
When any initialisation is performed, all ID previously registered will be erased. So all NATS ignition
keys must be registered again.
The engine cannot be started with an unregistered key. In this case, the system may show ``DIFFER-
ENCE OF KEY'' or ``LOCK MODE'' as a self-diagnostic result on the CONSULT screen.
HOW TO READ SELF-DIAGNOSTIC RESULTS
NOTE:
+If trip number is more than 1, MIL does not blink.
+Time data is not indicated for TB45E engine models.
SELF-DIAGNOSTIC RESULTS ITEM CHART
Detected items (Screen terms) Description Reference page
IMMU ECM received the signal from IMMU that IMMU is malfunctioning. EL-246
ECM ECM is malfunctioning. EL-246
CHAIN OF ECM-IMMU Communication impossible between ECM and IMMU. EL-247
DIFFERENCE OF KEYIMMU can receive the key ID signal but the result of ID veri®cation
between key ID and IMMU is NG.EL-249
CHAIN OF IMMU-KEY IMMU cannot receive the key ID signal. EL-250
ID DISCORD, IMM-ECMThe result of ID veri®cation between IMMU and ECM is NG. System ini-
tialisation is required.EL-250
MINGLE NOISENoise (interference) mingled into NATS communication lines during com-
municating.EL-251
DON'T ERASE BEFORE CHECK-
ING ENG DIAGEngine trouble data and NATS trouble data have been detected in ECM. EL-244
LOCK MODEWhen an unregistered ignition key is used, or if the starting operation is
carried out two or more times consecutively with the ignition key, IMMU
or ECM malfunctioning, NATS will shift the mode to one which prevents
the engine from being started.EL-252
SEL332UE
NATS (Nissan Anti-Theft System)/LHD MODELS
CONSULT (Cont'd)
EL-243

SYMPTOM CHART
SYMPTOMDisplayed ``SELF-DIAG RESULTS''
on CONSULT screen.DIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)
+MIL blinking
+Engine will startIMMUPROCEDURE 1
(EL-246)IMMU
ECMPROCEDURE 2
(EL-246)ECM
+MIL blinking
+Engine does not startCHAIN OF ECM-IMMUPROCEDURE 3
(EL-247)Open circuit in battery voltage line
of IMMU circuit
Open circuit in ignition line of IMMU
circuit
Open circuit in ground line of IMMU
circuit
Open or short circuit in communica-
tion line between IMMU and ECM
ECM
IMMU
DIFFERENCE OF KEYPROCEDURE 4
(EL-249)Unregistered key
IMMU
CHAIN OF IMMU-KEYPROCEDURE 5
(EL-250)Malfunction of key ID chip
IMMU
ID DISCORD, IMM-ECMPROCEDURE 6
(EL-250)System initialisation has not yet
been completed.
ECM
IMMU
MINGLE NOISEPROCEDURE 7
(EL-251)Noise interference in communica-
tion line
LOCK MODEPROCEDURE 8
(EL-252)LOCK MODE
+MIL staying ONDON'T ERASE BEFORE CHECK-
ING ENG DIAGWORK FLOW
(EL-244)Engine trouble data and NATS
trouble data have been detected in
ECM.
+Security indicator does not oper-
ate properly.
+Engine starts properly.ÐPROCEDURE 9
(EL-253)Security indicator circuit
Security indicator
Continuation of initialisation mode
*Lighting-up mode of MIL (Malfunction Indicator Lamp)
For single malfunction of NATS: Blinking
For dual malfunctions of NATS and an engine-related part: Stays ON
For single malfunction of an engine-related part: Stays ON
NATS (Nissan Anti-Theft System)/LHD MODELS
Trouble Diagnoses (Cont'd)
EL-245

CONSULT DIAGNOSTIC TEST MODE FUNCTION
CONSULT DIAGNOSTIC TEST
MODEDescription
C/U INITIALIZATION When replacing any of the following three components, C/U initialization is necessary.
[NATS ignition key/IMMU/ECM]
SELF-FUNCTION CHECK ECM checks its own NATS communication interface by itself.
SELF-DIAGNOSTIC RESULTS Detected items (screen terms) are as shown in the chart below.
NOTE:
When any initialisation is performed, all ID previously registered will be erased. So all NATS ignition
keys must be registered again.
The engine cannot be started with an unregistered key. In this case, the system may show ``DIFFER-
ENCE OF KEY'' or ``LOCK MODE'' as a self-diagnostic result on the CONSULT screen.
HOW TO READ SELF-DIAGNOSTIC RESULTS
* If trip number is more than 1, MIL does not blink.
SELF-DIAGNOSTIC RESULTS ITEM CHART
Detected items (Screen terms) Description Reference page
IMMU ECM received the signal from IMMU that IMMU is malfunctioning. EL-261
ECM ECM is malfunctioning. EL-261
CHAIN OF ECM-IMMU Communication impossible between ECM and IMMU. EL-262
DIFFERENCE OF KEYIMMU can receive the key ID signal but the result of ID veri®cation
between key ID and IMMU is NG.EL-264
CHAIN OF IMMU-KEY IMMU cannot receive the key ID signal. EL-265
ID DISCORD, IMM-ECMThe result of ID veri®cation between IMMU and ECM is NG. System ini-
tialisation is required.EL-266
MINGLE NOISENoise (interference) mingled into NATS communication lines during com-
municating.EL-267
DON'T ERASE BEFORE CHECK-
ING ENG DIAGEngine trouble data and NATS trouble data have been detected in ECM. EL-259
LOCK MODEWhen an unregistered ignition key is used, or if the starting operation is
carried out two or more times consecutively with the ignition key, IMMU
or ECM malfunctioning, NATS will shift the mode to one which prevents
the engine from being started.EL-268
SEL332UC
NATS (Nissan Anti-Theft System)/RHD MODELS
CONSULT (Cont'd)
EL-258