Nissan Terrano r20e. Instruction — part 190
Component Description
VEHICLE SPEED SENSOR (VSS)
The vehicle speed sensor is installed in the combination meter. It
contains a pulse generator which provides a vehicle speed signal
to the speedometer. The speedometer then sends a signal to the
ECM.
On Board Diagnosis Logic
DTC
Malfunction is detected when .
Check Items
(Possible Cause)
P0500
0104
I
The almost 0 km/h (0 mph) signal from vehicle speed
sensor is sent to ECM even when vehicle is being
driven.
I
Harness or connector
(The vehicle speed sensor circuit is open or short-
circuited.)
I
Vehicle speed sensor
Overall Function Check
Use this procedure to check the overall function of the vehicle
speed sensor circuit. During this check, a DTC might not be con-
firmed.
WITH CONSULT-II
1) Jack up drive wheels.
2) Start engine.
3) Read vehicle speed sensor signal in “DATA MONITOR” mode
with CONSULT-II.
The vehicle speed on CONSULT-II should be able to exceed 10
km/h (6 mph) when rotating wheels with suitable gear position.
WITHOUT CONSULT-II
1) Jack up drive wheels.
2) Rotate drive wheel by hand.
3) Check voltage between ECM connector terminal
417
and body
ground with tester.
Voltage should vary between approx. 0 - Battery voltage.
AEC110
SEF864Y
MEC970D
DTC P0500 VEHICLE SPEED SEN
TD27Ti
EC-397
Wiring Diagram
YEC147A
DTC P0500 VEHICLE SPEED SEN
TD27Ti
EC-398
Diagnostic Procedure
INSPECTION START
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch to “LOCK” position.
2. Disconnect ECM harness connector
and combination meter harness con-
nector.
3. Check harness continuity between
ECM connector terminal
417
and
combination meter connector terminal
q
26
. Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short-circuit.
OK
E
NG
Check the following:
I
Harness for open or
short-circuit between
ECM and combination
meter
If NG, repair harness or
connectors.
CHECK SPEEDOMETER FUNCTION.
Make sure that speedometer functions
properly.
OK
E
NG
Check the following:
I
Harness for open or
short-circuit between
combination meter and
vehicle speed sensor
If NG, repair harness or
connectors.
Check vehicle speed sen-
sor and its circuit.
Refer to EL section.
Disconnect and reconnect harness con-
nectors in the circuit. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
H
H
H
H
H
DTC P0500 VEHICLE SPEED SEN
TD27Ti
EC-399
Component Description
BRAKE SWITCH
The ECM receives signals from two brake switches. One is a con-
ventional brake lamp switch, the other is referred to as a redundant
brake switch 2.
In case the accelerator pedal does not return to the idle position
(pedal sticks), the driver will react by depressing the brake. In this
(emergency) situation, the ECM will disregard the accelerator pedal
signal and bring back the engine speed to 1,200 rpm.
On Board Diagnosis Logic
DTC
Malfunction is detected when ...
Check Items
(Possible Cause)
P0571
0807
I
Brake switch circuits are open or shorted.
I
Harness or connectors
(Brake switch circuits are open or shorted.)
I
Stop lamp switch
I
Brake switch 2
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch to “ON” position and select “DATA MONI-
TOR” mode with CONSULT-II.
2) Depress brake pedal for at least 1 minute.
WITHOUT CONSULT-II
1) Turn ignition switch to “ON” position.
2) Depress brake pedal for at least 1 minute.
3) Turn ignition switch to “LOCK” position, wait at least 5 seconds
and then turn to “ON” position.
4) Perform “Diagnostic Test Mode II” (Self-diagnostic results).
DTC P0571 BRAKE SW
TD27Ti
EC-400
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