1998 NISSAN PATROL battery

TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
50 B Sensors' groundEngine is running.
(Warm-up condition)
Idle speedApproximately 0V
51 L/WAccelerator position sen-
sor groundEngine is running.
(Warm-up condition)
Idle speedApproximately 0V
53
57WControl sleeve position
sensor power supplyEngine is running.
Idle speedApproximately 2.6V
SEF724V
56
61W Power supply for ECM Ignition switch ``ON''BATTERY VOLTAGE
(11 - 14V)
59 BR/W Heat up switchIgnition switch ``ON''
Heat up switch is ``OFF''.0V
Ignition switch ``ON''
Heat up switch is ``ON''.BATTERY VOLTAGE
(11 - 14V)
62
66BControl sleeve position
sensor groundEngine is running.
Idle speedApproximately 2.6V
SEF725V
63
67RControl sleeve position
sensorEngine is running.
Idle speedApproximately 2.6V
SEF726V
68 B/WAccelerator position sen-
sor signal to TCMIgnition switch ``ON''Accelerator pedal fully released0.4 - 0.6V
Ignition switch ``ON''
Accelerator pedal fully depressedApproximately 4.3V
70 BR Power supply (Back-up) Ignition switch ``OFF''
BATTERY VOLTAGE
(11 - 14V)
101
107R/B Electric governorEngine is running.
Idle speedBATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð General Description
ECM Terminals and Reference Value (Cont'd)
EC-60

TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
102
108G/Y Electric governor groundEngine is running.
Idle speedApproximately 10V
SEF727V
Engine is running.
Engine speed is 2,000 rpm.Approximately 10V
SEF728V
103 L/Y EGRC-solenoid valve AEngine is running.
(Warm-up condition)
Idle speed0-1V
Engine is running.
(Warm-up condition)
Engine is revving from idle up to 3,750 rpm.BATTERY VOLTAGE
(11 - 14V)
104
11 0L/WInjection timing control
valveEngine is running.
(Warm-up condition)
Idle speedBATTERY VOLTAGE
(11 - 14V)
SEF729V
Engine is running.(Warm-up condition)
Engine speed is 2,000 rpm.BATTERY VOLTAGE
(11 - 14V)
SEF730V
106
11 2
11 8B ECCS groundEngine is running.
Idle speedApproximately 0V
109 BR/Y EGRC-solenoid valve BEngine is running.
(Warm-up condition)
Idle speed0-1V
Engine is running.
(Warm-up condition)
Engine is revving from idle up to 2,600 rpm.BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð General Description
ECM Terminals and Reference Value (Cont'd)
EC-61

TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
111 LG/B Glow relay Refer to ``Glow Control System'', EC-151.
11 3
11 5R/W Fuel cut solenoid valveIgnition switch ``OFF''
Approximately 0V
Ignition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
11 6
11 7W Power supply for ECM Ignition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð General Description
ECM Terminals and Reference Value (Cont'd)
EC-62

Main Power Supply and Ground Circuit
ECM TERMINALS AND REFERENCE VALUE
Remarks: Speci®cation data are reference values and are measured between each terminal andV43(ECCS
ground) with a voltmeter.
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
4 B/Y ECCS relay (Self-shutoff)Ignition switch ``ON''
Ignition switch ``OFF''
For a few seconds after turning ignition switch
``OFF''0 - 1.5V
Ignition switch ``OFF''
A few seconds passed after turning ignition
switch ``OFF''BATTERY VOLTAGE
(11 - 14V)
38 B/Y Ignition switchIgnition switch ``OFF''
0V
Ignition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
39
43B ECCS groundEngine is running.
Idle speedEngine ground
(Probe this terminal with
@tester probe when
measuring.)
56
61W Power supply for ECM Ignition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
70 BR Power supply (Back-up) Ignition switch ``OFF''
BATTERY VOLTAGE
(11 - 14V)
106
11 2
11 8B ECCS groundEngine is running.
Idle speedApproximately 0V
11 6
11 7W Power supply for ECM Ignition switch ``ON''
BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS FOR POWER SUPPLY
EC-63

INSPECTION START
Start engine.
Is engine running?
Ye s
cNo
CHECK POWER SUP-
PLY-I.
1. Turn ignition switch
``ON''.
2. Check voltage between
ECM terminal
V38and
ground with CONSULT
or tester.
Voltage: Battery volt-
age
If NG, check the following.
+Harness connectors
M51,F6+10A fuse
+Harness for open or
short between ECM and
fuse
If NG, repair harness or
connectors.
OK
Go to
``CHECK
GROUND CIRCUIT'' on
EC-68.
CHECK POWER SUPPLY-II.
1. Stop engine.
2. Check voltage between ECM terminal
V70and ground with CONSULT or
tester.
Voltage: Battery voltage
OK
cNG
Check the following.
+Harness connectors
E127,M21+Harness connectorsM52,F7+7.5A fuse
+Harness for open or
short between ECM and
battery
If NG, repair harness or
connectors.
CHECK POWER SUPPLY-III.
1. Turn ignition switch ``ON'' and then
``OFF''.
2. Check voltage between ECM terminals
V56,V61,11 6,11 7and ground with
CONSULT or tester.
Voltage:
After turning ignition switch ``OFF'',
battery voltage will exist for a few
seconds, then drop to approximately
0V.
NG
cOK
Go to``CHECK
GROUND CIRCUIT'' on
EC-68.
Case-1: Battery voltage does
not exist.
Case-2: Battery voltage exists
for more than a few
seconds.
Case-1
cCase-2
Go to``CHECK ECCS
RELAY'' on next page.
jA
SEF065P
SEF056R
SEF566S
SEF567S
.
.
.
.
.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Main Power Supply and Ground Circuit
(Cont'd)
EC-66

jA
CHECK HARNESS CONTINUITY
BETWEEN ECCS RELAY AND ECM.
1. Disconnect ECM harness connector.
2. Disconnect ECCS relay.
3. Check harness continuity between ECM
terminals
V56,V61and relay terminal
V7, and ECM terminals11 6,11 7
and relay terminalV5.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
+Harness connectors
M52,F7
+Harness connectors
M50,F5
+Harness for open or
short between ECM and
ECCS relay
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK VOLTAGE BETWEEN ECCS
RELAY AND GROUND.
Check voltage between relay terminals
V1,V3,V6and ground with CONSULT
or tester.
Voltage: Battery voltage
OK
cNG
Check the following.
+Harness connectors
E127,M21
+15A fuse
+Harness for open or
short between ECCS
relay and battery
If NG, repair harness or
connectors.
CHECK OUTPUT SIGNAL CIRCUIT.
Check harness continuity between ECM
terminal
V4and relay terminalV2.
Continuity should exist.
If OK, check harness for short to ground
and short to power.
OK
cNG
Check the following.
+Harness connectors
M52,F7
+Harness for open or
short between ECM and
ECCS relay
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK ECCS RELAY.
1. Apply 12V direct current between relay
terminals
V1andV2.
2. Check continuity between relay termi-
nals
V3andV5,V7andV6.
12V (
V1-V2) applied:
Continuity exists.
No voltage applied:
No continuity
OK
cNG
Replace ECCS relay.
jB
SEF513V
SEF569S
SEF030S
SEC202B
.
.
.
.
.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Main Power Supply and Ground Circuit
(Cont'd)
EC-67

DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK POWER SUPPLY.
1. Turn ignition switch ``OFF''.
2. Disconnect mass air ¯ow sensor har-
ness connector.
3. Turn ignition switch ``ON''.
4. Check voltage between terminal
V1and ground with CONSULT or tester.
Voltage: Battery voltage
OK
cNG
Check the following.
+Harness connectors
M52,F7+Harness for open or
short between mass air
¯ow sensor and ECM
+Harness for open or
short between mass air
¯ow sensor and ECCS
relay
If NG, repair harness or
connector.
CHECK GROUND CIRCUIT.
1. Turn ignition switch ``OFF''.
2. Loosen and retighten engine ground
screws.
3. Check harness continuity between ter-
minal
V2and engine ground.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Check the following.
+Harness connectors
E106,M88+Harness connectorsM51,F6+Harness for open or
short between mass air
¯ow sensor and ECM
+Harness for open or
short between mass air
¯ow sensor and TCM
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK INPUT SIGNAL CIRCUIT.
1. Disconnect ECM harness connector.
2. Check harness continuity between ter-
minal
V3and ECM terminalV35.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
cNG
Repair open circuit or short
to ground or short to power
in harness or connectors.
CHECK COMPONENT
(Mass air ¯ow sensor).
Refer to ``COMPONENT INSPECTION''
on next page.
OK
cNG
Replace mass air ¯ow sen-
sor.
Disconnect and reconnect harness con-
nectors in the circuits. Then retest.
Trouble is not ®xed.
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
SEF713V
SEF736V
SEF676V
SEF737V
SEF738V
.
.
.
.
.
.
.
TROUBLE DIAGNOSIS FOR ``MASS AIR FLOW SEN'' (DTC 12)
Mass Air Flow Sensor (MAFS) (Cont'd)
EC-77

Vehicle Speed Sensor (VSS)
The vehicle speed sensor is installed in the transaxle. It contains a
pulse generator which provides a vehicle speed signal to the
speedometer. The speedometer then sends a signal to the ECM.
ECM TERMINALS AND REFERENCE VALUE
Remarks: Speci®cation data are reference values and are measured between each terminal andV43(ECCS
ground) with a voltmeter.
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse
Signal)
26 L/OR Vehicle speed sensorEngine is running.
Lift up the vehicle.In 1st gear positionVehicle speed is 40 km/h (25 MPH).0 - BATTERY VOLTAGE
(11 - 14V)
SEF717V
ON BOARD DIAGNOSIS LOGIC
Diagnostic
Trouble Code
No.Malfunction is detected when ....Check Items
(Possible Cause)
14+The almost 0 km/h (0 MPH) signal from vehicle speed
sensor is sent to ECM even when vehicle is being
driven.+Harness or connector
(The vehicle speed sensor circuit is open or shorted.)
+Vehicle speed sensor
AEC110
TROUBLE DIAGNOSIS FOR ``VEHICLE SPEED SEN'' (DTC 14)
EC-83