Nissan Terrano r20e. Instruction — part 100
Diagnostic test mode I — Bulb check
In this mode, the MI on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to EL
section, “WARNING LAMPS AND CHIME” or see EC-291.
Diagnostic test mode I — Malfunction warning
MI
Condition
ON
When the malfunction is detected or the ECM’s CPU is malfunctioning.
OFF
No malfunction.
Diagnostic test mode II — Self-diagnostic results
In this mode, DTC is indicated by the number of blinks of the MI as shown below.
Long (0.6 second) blinking indicates the two LH digits of number and short (0.3 second) blinking indicates the
two RH digits of number. For example, the MI blinks 10 times for 6 seconds (0.6 sec x 10 times) and then it
blinks three times for about 1 second (0.3 sec x 3 times). This indicates the DTC “1003”.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC “0505” refers to no
malfunction. (See TROUBLE DIAGNOSIS — INDEX, EC-7.)
How to erase diagnostic test mode II (Self-diagnostic results)
The DTC can be erased from the backup memory in the ECM when the diagnostic test mode is changed from
Diagnostic Test Mode II to Diagnostic Test Mode I. (Refer to “How to Switch Diagnostic Test Modes”, EC-36.)
I
If the battery terminal is disconnected, the DTC will be lost from the backup memory within 24
hours.
I
Be careful not to erase the stored memory before starting trouble diagnoses.
SEF298QA
SEF162PB
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ZD30DDTi
Malfunction Indicator (MI) (Cont’d)
EC-37
Relationship between MI, DTC, CONSULT-II and driving patterns
*1: When a malfunction is detected,
MI will light up.
*2: MI will not light up after ignition
switch is turned OFF.
*3: When a malfunction is detected
for the first time, the DTC will be
stored in ECM.
*4: The DTC will not be displayed any
longer after vehicle is driven 40
times without the same malfunc-
tion. (The DTC still remain in
ECM.)
*5: Other screens except SELF-DIAG-
NOSTIC RESULTS & DATA
MONITOR (AUTO TRIG) cannot
display the malfunction. DATA
MONITOR (AUTO TRIG) can dis-
play the malfunction at the
moment it is detected.
PBIB0589E
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ZD30DDTi
Malfunction Indicator (MI) (Cont’d)
EC-38
CONSULT-II
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT-II to data link connector, which is located
under the driver side dash panel.
3. Turn ignition switch ON.
4. Touch “START”.
5. Touch “ENGINE”.
6. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Instruction.
MEC992D
SEF995X
SEF320Y
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ZD30DDTi
EC-39
ENGINE CONTROL COMPONENT PARTS/CONTROL
SYSTEMS APPLICATION
Item
DIAGNOSTIC TEST MODE
SELF-DIAG
RESULTS
DATA MONI-
TOR
ACTIVE
TEST
ENGINE
CONTROL
COMPONENT
P
ARTS
INPUT
Engine coolant temperature sensor
X
X
Vehicle speed sensor
X
X
Accelerator position sensor
X
X
X
Accelerator position switch
X
X
Accelerator switch (F/C)
X
X
Crankshaft position sensor (TDC)
X
X
Ignition switch (start signal)
X
Park/Neutral position (PNP) switch
X
Battery voltage
X
Air conditioner switch
X
Mass air flow sensor
X
X
Stop lamp switch
X
X
Heat up switch
X
Charge air pressure sensor
X
OUTPUT
Glow relay
X
X
EGR volume control valve
X
X
X
Cooling fan relay
X
X
X
Air conditioner relay
X
Variable nozzle turbocharger control solenoid valve
X
Swirl control valve control solenoid valve
X
X
X: Applicable
SELF-DIAGNOSTIC MODE
Regarding items detected in “SELF-DIAG RESULTS” mode,
refer to “TROUBLE DIAGNOSIS — INDEX”, EC-7.
DATA MONITOR MODE
Monitored item
[Unit]
ECM
input
signals
Main
signals
Description
Remarks
CKPS
⋅
RPM (TDC)
[rpm]
q
q
I
The engine speed computed from the
crankshaft position sensor (TDC) signal
is displayed.
CMPS
⋅
RPM
⋅
PUMP
[rpm]
q
q
I
The engine speed computed from the
pulse signal sent from electronic control
fuel injection pump is displayed.
COOLAN TEMP/S
[°C] or [°F]
q
q
I
The engine coolant temperature (deter-
mined by the signal voltage of the engine
coolant temperature sensor) is displayed.
I
When the engine coolant temperature
sensor is open or short-circuited, ECM
enters fail-safe mode. The engine cool-
ant temperature determined by the ECM
is displayed.
VHCL SPEED SE
[km/h] or [mph]
q
q
I
The vehicle speed computed from the
vehicle speed sensor signal is displayed.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ZD30DDTi
CONSULT-II (Cont’d)
EC-40
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