turn signal NISSAN GT-R 1998 Service Manual

NISSAN GT-R 1998 Service Manual GT-R 1998 NISSAN NISSAN https://www.carmanualsonline.info/img/5/57354/w960_57354-0.png NISSAN GT-R 1998 Service Manual

Page 9 of 230

NISSAN GT-R 1998  Service Manual 
ENGINE AND EMISSION  CONTROL  OVERALL SYSTEM 
A 1 System Description 
The engine  control  system,  which  performs  various controls  such 
as the fuel injection  control and ignition timing control

Page 22 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES --- - - - -- -- - - 
Fail-safe and Backup Functions 
0 The fail-safe function  estimates the  opening conditions with  other  input signals  and selects  safer  condi- 
tions for  t

Page 24 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES 
Self-diagnosis (Contd) 
I  Malfunction indicator lamp 
MALFUNCTiON INDICATOR LAMP (MIL) INDICATION 
Diagnostic test  mode I - BULB CHECK 
0 The malfunction indicator lamp  bulb ch

Page 25 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES 
Self-diagnosis 
(Contd) 
SELF-DIAGNOSTIC INDICATION ITEMS 
I time while the  engine  is running. I 
MIL indication 
- 
DTC No. 
,, 
MIL  lights  up. l2 
Self-diagnostic  test item

Page 28 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES m 
CONSULT (Contd) 
SELF-DIAGNOSTIC RESULTS MODE 
When any of the  control  unit  input/output  signal circuits fails and  the  self-diagnostic  malfunction detection 
conditions

Page 29 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES 
CONSULT (Contd) 
DATA MONITOR MODE 
ECM input 
signals 
Monitored item 
[Unit]  Main 
signals  Remarks 
Description 
lndicates  the engine  speed computed 
from  the POS signal (l

Page 31 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES 
CONSULT (Contd) 
ACTIVE TEST MODE 
INJECTION I . CCohArthe amount  of  fuel  injection 
TEST ITEM 
CONDITION 
Engine:  Return 
to the  original trouble 
- I . Engine: After  warmi

Page 37 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES 
Symptom Matrix Chart (Contd) 
Sensor-related problems I Symptom characteristics and  ins~ection  hints 
Open  Engine 
will not start  when  either  REF  signal circuit or POS sign

Page 46 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES 
P ECM (aTCM) InputDutput Signal Reference 
Value 
SIGNAL VOLTAGES MEASURED WITH OSCILLOSCOPE AND CIRCUIT TESTER 
- Signal voltages  measured  at ECM  (-TCM)  terminals (terminals

Page 47 of 230

NISSAN GT-R 1998  Service Manual 
TROUBLE DIAGNOSES 
ECM (-TCM) InputlOutput Signal Reference 
Value (Contd) 
d 
voltages are 
Terminal No.  Signal name 
At idle  At 
approx. 2,000 rpm 
Approx. 
12V Approx. 8V 
AAC valve  control 
s
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