1999 NISSAN PRIMERA Electronic Repair Manual

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Page 513 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual DESCRIPTION FOR WORK FLOWNCEC0037S01
STEP DESCRIPTION
STEP IGet detailed information about the conditions and the environment when the incident/symptom occurred using the
ªDIAGNOSTIC WORK SHEETº, EC

DESCRIPTION FOR WORK FLOWNCEC0037S01
STEP DESCRIPTION
STEP IGet detailed information about the conditions and the environment when the incident/symptom occurred using the
ªDIAGNOSTIC WORK SHEETº, EC-QG-69.
STEP IIBefore confirming the concern, check and write down (print out using CONSULT-II or Generic Scan Tool) the (1st
trip) Diagnostic Trouble Code (DTC) and the (1st trip) freeze frame data, then erase the code and the data.
(Refer to EC-QG-44.) The (1st trip) DTC and the (1st trip) freeze frame data can be used when duplicating the
incident at STEP III & IV.
Study the relationship between the cause, specified by (1st trip) DTC, and the symptom described by the cus-
tomer. (The ªSymptom Matrix Chartº will be useful. See EC-QG-82.)
Also check related service bulletins for information.
STEP IIITry to confirm the symptom and under what conditions the incident occurs.
The ªDIAGNOSTIC WORK SHEETº and the freeze frame data are useful to verify the incident. Connect CON-
SULT-II to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results.
If the incident cannot be verified, perform INCIDENT SIMULATION TESTS. (Refer to GI section.)
If the malfunction code is detected, skip STEP IV and perform STEP V.
STEP IVTry to detect the (1st trip) Diagnostic Trouble Code by driving in (or performing) the ªDIAGNOSTIC TROUBLE
CODE CONFIRMATION PROCEDUREº. Check and read the (1st trip) DTC and (1st trip) freeze frame data by
using CONSULT-II or Generic Scan Tool.
During the (1st trip) DTC verification, be sure to connect CONSULT-II to the vehicle in DATA MONITOR (AUTO
TRIG) mode and check real time diagnosis results.
If the incident cannot be verified, perform INCIDENT SIMULATION TESTS. (Refer to GI section.)
In case the ªDIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDUREº is not available, perform the
ªOVERALL FUNCTION CHECKº instead. The (1st trip) DTC cannot be displayed by this check, however, this
simplified ªcheckº is an effective alternative.
The ªNGº result of the ªOVERALL FUNCTION CHECKº is the same as the (1st trip) DTC detection.
STEP VTake the appropriate action based on the results of STEP I through IV.
If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC PXXXX.
If the normal code is indicated, proceed to the BASIC INSPECTION. (Refer to EC-QG-72.) If CONSULT-II is
available, perform ªDATA MONITOR (SPEC)º mode with CONSULT-II and proceed to the ªTROUBLE DIAGNO-
SIS-SPECIFICATION VALUEº, EC-QG-98. (If malfunction is detected, proceed to ªREPAIR/REPLACEº. Then per-
form inspections according to the Symptom Matrix Chart. (Refer to EC-QG-82.)
STEP VIIdentify where to begin diagnosis based on the relationship study between symptom and possible causes. Inspect
the system for mechanical binding, loose connectors or wiring damage using (tracing) ªHarness Layoutsº.
Gently shake the related connectors, components or wiring harness with CONSULT-II set in ªDATA MONITOR
(AUTO TRIG)º mode.
Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CON-
SULT-II. Refer to EC-QG-91.
The ªDIAGNOSTIC PROCEDUREº in EC section contains a description based on open circuit inspection. A short
circuit inspection is also required for the circuit check in the DIAGNOSTIC PROCEDURE. For details, refer to GI
section (ªHOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENTº, ªCircuit Inspectionº).
Repair or replace the malfunction parts.
STEP VIIOnce you have repaired the circuit or replaced a component, you need to run the engine in the same conditions
and circumstances which resulted in the customer's initial complaint.
Perform the ªDIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDUREº and confirm the normal code
[Diagnostic trouble code No. P0000 or 0000] is detected. If the incident is still detected in the final check, perform
STEP VI by using a different method from the previous one.
Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) (1st trip) DTC in
ECM. (Refer to EC-QG-44.)
TROUBLE DIAGNOSIS Ð INTRODUCTIONQG16I18DE
Work Flow (Cont'd)
EC-71

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NISSAN PRIMERA 1999 Electronic Repair Manual Basic InspectionNCEC0038Precaution:
Perform Basic Inspection without electrical or mechanical
loads applied;
IHeadlamp switch is OFF,
On vehicle equipped with daytime light system, set lighting
switch

Page 515 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 4 CHECK THROTTLE VALVE OPERATION
1. Remove intake air ducts.
2. Check throttle valve operation when moving throttle drum by hand.
OK or NG
OK©Retighten the throttle drum fixing nuts.
NG©Clean the th

Page 516 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 7 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
With CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memor

Page 517 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 9 ADJUST THROTTLE POSITION SENSOR IDLE POSITION
Without CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Turn throttle position sensor body clockwise or counterclockwise until the voltag

Page 518 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 13 CHECK TARGET IDLE SPEED
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select ªENG SPEEDº in ªDATA MONITORº mode With CONSULT-II.
3. Check idle speed.
700 5

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NISSAN PRIMERA 1999 Electronic Repair Manual 18 CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select ªENG SPEEDº in ªDATA MONITORº mode With CONSULT-II.
3. Check idle speed.

Page 520 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual 22 CHECK IGNITION TIMING
1. Start engine and let it idle.
2. Check ignition timing at idle using a timing light.
SEM872F
Ignition timing: 8É 5É BTDC
OK©GO TO 28.
NG©GO TO 23.
23 PERFORM IDLE AIR

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