Nissan Terrano model r20 series 2004. Instruction — part 123
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)
4
G
ECM relay (Self-shutoff)
Ignition switch “ON”
Ignition switch “OFF”
For a few seconds after turning ignition switch
“OFF”
Approximately 0.25V
Ignition switch “OFF”
More than a few seconds after turning ignition
switch “OFF”
BATTERY VOLTAGE
(11 - 14V)
38
B/W
Ignition switch
Ignition switch “OFF”
0V
Ignition switch “ON”
BATTERY VOLTAGE
(11 - 14V)
56
61
116
B/W
B/W
B/W
Power supply for ECM
Ignition switch “ON”
BATTERY VOLTAGE
(11 - 14V)
On Board Diagnosis Logic
Malfunction is detected when .
Check Items (Possible Cause)
I
An irregular voltage signal from the ECM relay is sent to ECM.
I
Harness or connectors
(ECM relay circuit is open or shorted.)
I
ECM relay
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-216.
WITHOUT CONSULT-II
1) Turn ignition switch “ON”.
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-216.
SEF817Y
DTC 0902 ECM RLY
ZD30DDTi
EC-214
Wiring Diagram
YEC190A
DTC 0902 ECM RLY
ZD30DDTi
EC-215
Diagnostic Procedure
1
CHECK ECM POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM relay.
MEC021E
3. Check voltage between ECM relay terminals 2, 3 and ground with CONSULT-II or tester.
MEC978D
Voltage: Battery voltage
OK or NG
OK
E
GO TO 3.
NG
E
GO TO 2.
2
DETECT MALFUNCTIONING PART
Check the following.
I
10A fuse
I
15A fuse
I
Harness for open and short between ECM relay and battery
E
Repair open circuit or short to ground or short to power in harness or connectors.
3
CHECK ECM INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 56, 61, 116 and ECM relay terminal 5. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
E
GO TO 5.
NG
E
GO TO 4.
DTC 0902 ECM RLY
ZD30DDTi
EC-216
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M787, F66 (LHD models)
I
Harness for open or short between ECM and ECM relay
E
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK ECM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 4 and ECM relay terminal 1. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK
E
GO TO 7.
NG
E
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M787, F66 (LHD models)
I
Harness for open or short between ECM and ECM relay
E
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between ECM relay terminals 3 and 5, 6 and 7.
SEF296X
OK or NG
OK
E
GO TO 8.
NG
E
Replace ECM relay.
8
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-78.
E
INSPECTION END
DTC 0902 ECM RLY
ZD30DDTi
Diagnostic Procedure (Cont’d)
EC-217
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