1990 MITSUBISHI SPYDER Service Repair Manual

Page 633 of 2103

MITSUBISHI SPYDER 1990  Service Repair Manual   ENGINE  (TURBO)
AND
 ENGINE>  Troubleshooting
INSPECTION  PROCEDURE  USING  AN  ANALYZER
VOLUME  AIR  FLOW  SENSOR
Measurement  method
1.  Disconnect  the  volume  air  flow  sensor  connector,  and

Page 634 of 2103

MITSUBISHI SPYDER 1990  Service Repair Manual   ENGINE  (TURBO)
AND  ENGINE>  Troubleshooting . . 
Observation  conditions (pattern  changes  with  engine   changes.) 
.
id
10--
0Time
Wave  pattern  observation  points
Check  to  be  sure  that

Page 635 of 2103

MITSUBISHI SPYDER 1990  Service Repair Manual   ENGINE  (TURBO)
AND  ENGINE>
CAMSHAFT  POSITION SENSOR  AND 
POSITION  SENSOR
Measurement  method
1.Connect  the  analyzer  special  patterns  pickup  to 
position sensor terminal 2.
2.Disconnect  t

Page 636 of 2103

MITSUBISHI SPYDER 1990  Service Repair Manual   ENGINE  (TURBO)
AND
  ENGINE>  Troubleshooting
Analyzer
Examples  of  abnormal  wave ,
l  Example  1
Cause  problem
Sensor  interface  malfunction
Wave  pattern  characteristics
Rectangular  wave  p

Page 637 of 2103

MITSUBISHI SPYDER 1990  Service Repair Manual   ENGINE  (TURBO)
AND  ENGINE>  Troubleshooting
Standard Wave Pattern 
Observation conditions
FunctionSpecial  patterns
Pattern  height
Variable
Standard  wave  pattern
Variable  knobAdjust  while  vi

Page 638 of 2103

MITSUBISHI SPYDER 1990  Service Repair Manual Analyzer
STEPPER  MOTOR  Engine (Turbo)>
Measurement  method
1.  Disconnect  the  stepper  motor  connector,  and  connect
the  special  tool  (test  harness: 
  in  between.
2. Connect the analyzer s

Page 639 of 2103

MITSUBISHI SPYDER 1990  Service Repair Manual Wave  pattern  observation  pointsCheck  that  the  standard  wave  pattern  appears  when  t he  stepper 
  operating.
Point  A:  Presence  or  absence  of  induced  voltage  fro m  the  motor  turni

Page 640 of 2103

MITSUBISHI SPYDER 1990  Service Repair Manual   ENGINE  (TURBO)
AND  ENGINE>
Analyzer
IGNITION  COIL  AND  IGNITION 
l Ignition  coil  primary 
Refer  to  GROUP  16   Ignition  System.
l Ignition  power  transistor  control  signal.
Measurement