Nissan Terrano r20e. Instruction — part 155
4
CHECK PNP RELAY INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch “OFF”.
2. Disconnect park/neutral position switch and park/neutral position relay harness connectors.
3. Check harness continuity between PNP switch terminal 2 and PNP relay terminals 2. 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
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK GROUND CIRCUIT
1. Disconnect PNP relay harness connector.
2. Check continuity between PNP relay terminal 1 and ground. Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK
E
GO TO 6.
NG
E
Repair open circuit or short to ground or short to power in harness or connectors.
6
CHECK ECM INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector and PNP relay harness connector.
2. Check continuity between ECM terminal 22 and PNP relay terminal 7. Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground or short to power.
OK or NG
OK
E
GO TO 8.
NG
E
GO TO 7.
7
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors F93, M788 (LHD models)
I
Harness for open or short between PNP relay and ECM
E
Repair open circuit or short to ground or short to power in harness or connectors.
8
CHECK PARK/NEUTRAL POSITION (PNP) SWITCH
Refer to “TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS” in AT section.
OK or NG
OK
E
GO TO 9.
NG
E
Replace park/neutral position (PNP) switch.
9
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-78.
E
INSPECTION END
PARK/NEUTRAL POSITION (PNP) SWITCH
ZD30DDTi
Diagnostic Procedure (Cont’d)
EC-257
Component Description
The heat up switch is located on the lower side of the instrument
panel. This switch is used to speed up the heater’s operation when
the engine is cold.
When the ECM received the heat up switch “ON” signal, the ECM
increases the engine idle speed to 1,100 to 1,200 rpm to warm up
engine quickly.
This system works when all conditions listed below are met.
Heat up switch
ON
Engine coolant temperature
Below 105°C (221°F)
Shift lever
“P” or “N”
Accelerator pedal
Fully released
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
WARM UP SW
I
Ignition switch: ON
Heat up switch: ON
ON
Heat up switch: OFF
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 and Pulse
Signal)
59
G
Heat up switch
Ignition switch “ON”
Heat up switch is “OFF”.
0V
Ignition switch “ON”
Heat up switch is “ON”.
BATTERY VOLTAGE
(11 - 14V)
HEAT UP SWITCH
ZD30DDTi
EC-258
Wiring Diagram
LHD MODELS
YEC198A
HEAT UP SWITCH
ZD30DDTi
EC-259
Diagnostic Procedure
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
E
GO TO 2.
No
E
GO TO 3.
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “WARM UP SW” in “DATA MONITOR” mode with CONSULT-II under the following conditions.
SEF302Z
OK or NG
OK
E
INSPECTION END
NG
E
GO TO 4.
3
CHECK OVERALL FUNCTION
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 59 and ground under the following conditions.
SEF303Z
OK or NG
OK
E
INSPECTION END
NG
E
GO TO 4.
HEAT UP SWITCH
ZD30DDTi
EC-260
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