Nissan Terrano r20e. Instruction — part 153
Diagnostic Procedure
1
CHECK START SIGNAL OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “START SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.
SEF604X
Without CONSULT-II
Check voltage between ECM terminal 20 and ground under the following conditions.
SEF415Y
OK or NG
OK
E
INSPECTION END
NG
E
GO TO 2.
2
CHECK START SIGNAL INPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and ignition switch harness connector.
3. Check harness continuity between ECM terminal 20 and ignition switch 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 4.
NG
E
GO TO 3.
3
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M787, F66 (LHD models)
I
Harness for open or short between ECM and ignition switch
E
Repair open circuit or short to ground or short to power in harness or connectors.
START SIGNAL
ZD30DDTi
EC-249
4
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-78.
E
INSPECTION END
START SIGNAL
ZD30DDTi
Diagnostic Procedure (Cont’d)
EC-250
Description
When the gear position is in “Neutral”, neutral position is “ON”.
ECM detects the position because the continuity of the line (the
“ON” signal) exists.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
P/N POSI SW
I
Ignition switch: ON
Shift lever: Park/Neutral
ON
Except above
OFF
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)
22
BR/Y
(A/T
mod-
els)
G (M/T
mod-
els)
Park/Neutral position
switch
Ignition switch “ON”
Gear position is “Neutral” (M/T models)
Gear position is “P” or “N” (A/T models)
Approximately 0V
Ignition switch “ON”
Except the above gear position
BATTERY VOLTAGE
(11 - 14V)
MEC029E
PARK/NEUTRAL POSITION (PNP) SWITCH
ZD30DDTi
EC-251
Wiring Diagram
YEC197A
PARK/NEUTRAL POSITION (PNP) SWITCH
ZD30DDTi
EC-252
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