Nissan Terrano r20e. Manual — part 144
Description
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the engine.
On Board Diagnosis Logic
Malfunction is detected when ...
Check Items (Possible Cause)
I
ECM input signal processing function is malfunctioning.
I
ECM
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Turn ignition switch “OFF”, wait at least 20 seconds and then
turn “ON”.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-214.
WITHOUT CONSULT-II
1) Turn ignition switch “ON” and wait at least 2 seconds.
2) Turn ignition switch “OFF”, wait at least 20 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-214.
SEC220B
SEF817Y
DTC 0903 ECM 15
ZD30DDTi
EC-213
Diagnostic Procedure
1
INSPECTION START
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SELF DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4. Perform “DTC Confirmation Procedure”, EC-213, again.
5. Is the malfunction displayed again?
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory.
3. Perform “DTC Confirmation Procedure”, EC-213, again.
4. Perform “Diagnostic Test Mode II (Self-diagnostic results)”.
5. Is the DTC 0903 displayed again?
Yes or No
Yes
E
Replace ECM.
No
E
INSPECTION END
DTC 0903 ECM 15
ZD30DDTi
EC-214
Component Description
The charge air pressure sensor detects pressure in the exit side of
the charge air cooler. The sensor output voltage to the ECM
increases as pressure increases. The charge air pressure sensor
is not used to control the engine system under normal conditions.
ECM Terminals and Reference Value
Specification data are reference values, and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may damage the
ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
46
G
Charge air pressure sen-
sor
Engine is running.
Warm-up condition
Idle speed
Approximately 2.0V
On Board Diagnosis Logic
Malfunction is detected when ...
Check Items (Possible Cause)
I
An excessively high or low voltage from the sensor is sent to
ECM.
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Charge air pressure sensor
SEF340VA
SEF627RA
DTC 0905 TURBO PRESSURE
ZD30DDTi
EC-215
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 1 second.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-219.
WITHOUT CONSULT-II
1) Turn ignition switch “ON” and wait at least 1 second.
2) Turn ignition switch “OFF”, wait at least 5 seconds and then turn
“ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-219.
SEF817Y
DTC 0905 TURBO PRESSURE
ZD30DDTi
EC-216
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