Protege Workshop Manual - Engine

PCM Inspection Using the SST (104 Pin Breakout Box)

  1. Disconnect the negative battery cable.

  2. Disconnect the PCM connector.

  3. Connect the SST (104 Pin Breakout Box) to the PCM as shown.

  4. Tighten the connector bolt.

  5. Connect the negative battery cable.

  6. Measure the voltage at each terminal.

Terminal voltage table (Reference)

 Terminal  Signal  Connected to  Test condition  Voltage (V)  Action
 1*1  Shift solenoid E control  Shift solenoid E  Idle (P position)  Below 1.0  
 1 range (1GR)  B+
 2  MIL control  MIL (in instrument cluster)  Ignition switch ON  Below 1.0  
  • Inspect MIL
  • Inspect related harness
 Idle  B+
 3*2  M range switch  Selector lever component  Ignition switch ON  Manual mode  Below 1.0  
  • Inspect selector lever
  • Inspect related harness
 Others  B+
 4  B+ monitor  Battery  Under any condition  B+  
 5  Diagnostic test mode  DLC terminal TEN  Ignition switch ON  Open terminal TEN  B+  
  • Inspect related harness
 Short to ground terminal TEN  Below 1.0
 6  Clutch operation (MTX)  Clutch switch  Clutch pedal depressed  Below 1.0  
 Clutch pedal released  B+
 D range (ATX)  TR switch*4

(terminal G)

 Ignition switch ON  Selector lever is at D range  B+  
 Selector lever component*3  Selector lever is at other than D range  Below 1.0
 7*3  1 range  TR switch

(terminal E)

 Ignition switch ON  Selector lever is at 1 range  B+  
 Selector lever is at other then 1 range  Below 1.0
 8*2  Up switch  Selector lever component  Ignition switch ON  Detects up-shift operation of selector lever in M range  Below 1.0  
  • Inspect selector lever
  • Inspect related harness
 Others  B+
 9*3  2 range  TR switch

(terminal F)

 Ignition switch ON  Selector lever is at 2 range  B+  
 Selector lever is at other then 2 range  Below 1.0
 10  ¾  ¾  ¾  ¾  ¾
 11  ¾  ¾  ¾  ¾  ¾
 12*2  1st gear light  Instrument cluster  Ignition switch ON  1st gear  Below 1.0  
  • Inspect instrument cluster
  • Inspect related harness
 Others  Applox. 5
 13  EPROM flashing  DLC-2 terminal FEPS  Because this terminal is for serial communication, good/no good judgment by terminal voltage is not possible.  
  • Inspect related harness
 14  ¾  ¾  ¾  ¾  ¾
 15  ¾  ¾  ¾  ¾  ¾
 16  ¾  ¾  ¾  ¾  ¾
 17*2  2nd gear light  Instrument cluster  Ignition switch ON  2nd gear  Below 1.0  
  • Inspect instrument cluster
  • Inspect related harness
 Others  Applox. 5
 18  CDCV control  CDCV  Ignition switch ON  B+  
 Diagnosis executed (while on-board device control is carried out)  Below 1.0
 19  VICS control  VICS solenoid valve  Engine speed: above 4,750 rpm  B+  
 Engine speed: below4,750 rpm  Below 1.0
 20*2  Down switch  Selector lever component  Ignition switch ON  Detects down-shift operation of selector lever in M range  Below 1.0  
  • Inspect selector lever
  • Inspect related harness
 Others  B+
 21  NE (+)  CKP sensor    
 22  NE (-)  CKP sensor    
 23*1  Input/turbine speed (-)  Input/turbine speed sensor    
 24  GND  GND  Under any condition  Below 1.0  
  • Inspect related harness
 25  ¾  ¾  ¾  ¾  ¾
 26  IGT1  Ignition coil (No. 1, 4 cylinders)    
 27*1  Shift solenoid D control  Shift solenoid D  Idle  Selector lever is at P, N position and 1 range  B+  
 Others  Below 1.0
 28*1  Vehicle speed output  Speedometer (in instrument cluster)    
  • Inspect speedometer

    (See Speedometer )

  • Inspect related harness
 29*3  O/D OFF signal  O/D OFF switch  Ignition switch ON  O/D OFF switch pushed  Below 1.0  
 O/D OFF switch released  B+
 30  Generator output voltage  Generator

(terminal P)

   
 31  PSP  PSP switch  Ignition switch ON  B+  
 Idle  Steering wheel at straight ahead position  B+
 While turning steering wheel  Below 1.0
 32*1  R position  TR switch

(terminal C)

 Ignition switch ON  Selector lever is at R position  B+  
 Selector lever is at other then R position  Below 1.0
 33  ¾  ¾  ¾  ¾  ¾
 34  BARO/EGR boost  EGR boost sensor  Ignition switch ON (Barometric pressure at 102 kPa

{765 mmHg, 30 inHg})

 Approx. 4.0  
 35  Catalytic converter efficiency  HO2S (Rear)  Ignition switch ON  Below 1.0  
 Idle  Engine cold  Approx. 0
 After warm up  0.1¾0.9
 36  ¾  ¾  ¾  ¾  ¾
 37*1  TFT  TFT sensor  Ignition switch ON  TFT 20 °C

{68 °F}

 3¾4  
 TFT 130 °C {266 °F}  0.2¾0.7
 38  ECT  ECT sensor  Ignition switch ON  ECT 20 °C

{68 °F}

 2.9¾3.1  
 After warm up  0.2¾1.0
 39  IAT  IAT sensor (integrated with MAF sensor)  Ignition switch ON  IAT 20 °C

{68 °F}

 2.3¾2.4  
 IAT 30 °C

{86 °F}

 1.7¾1.9
 40  ¾  ¾  ¾  ¾  ¾
 41  A/C on signal  Refrigerant pressure switch  Idle  A/C switch and fan switch on  Below 1.0  
 A/C switch off  B+
 42  Generator warning light control  Generator warning light (in instrument cluster)  Ignition switch ON  Below 1.0  
  • Inspect generator warning light
  • Inspect related harness
 Idle  B+
 43*3  O/D OFF indicator light signal  O/D OFF indicator light  Ignition switch ON  O/D OFF indicator light illuminates  Below 1.0  
  • Inspect O/D OFF indicator light
  • Inspect related harness
 O/D OFF indicator light does not illuminate  B+
 44*1  Pressure control solenoid control (+)  Pressure control solenoid    
 45  Condenser fan control  Condenser fan relay  Ignition switch ON  B+  
 Idle  Condenser fan operating  Below 1.0
 Others  B+
 46  EGR valve #3 coil control  EGR valve (terminal B)  Ignition switch ON  B+  
 Idle  B+
 47  Cooling fan control  Cooling fan relay  Ignition switch ON  B+  
 Idle  Cooling fan operating  Below 1.0
 Others  B+
 48  Engine speed  Tachometer (in instrument cluster), DLC terminal IG-    
  • Inspect tachometer

    (See Tachometer )

  • Inspect related harness
 49  ¾  ¾  ¾  ¾  ¾
 50  ¾  ¾  ¾  ¾  ¾
 51  GND  GND  Under any condition  Below 1.0  
  • Inspect related harness
 52  IGT2  Ignition coil (No. 2, 3 cylinders)    
 53  Generator field coil control  Generator

(terminal D)

   
 54  IAC (+)  IAC valve  Ignition switch ON  B+  
 Idle (After warm up and E/L off)  B+
 55  Back-up power supply  Battery (positive terminal)  Under any condition  B+  
 56  EGR valve #4 coil control  EGR valve

(terminal F)

 Ignition switch ON  Below 1.0  
 Idle  Below 1.0
 57  Knocking  Knock sensor (+)  Ignition switch ON (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter)  Below 1.0  
 58  Vehicle speed  Speedometer (MTX)    
 VSS (ATX)  
 59  Knocking  Knock sensor (-)  Ignition switch ON (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter)  Below 1.0  
 60  HO2S (Front)  HO2S (Front)  Ignition switch ON  0¾1.0  
 Idle  After warm up  0¾1.0
 Acceleration  0.5¾1.0
 Deceleration  0¾0.5
 61  ¾  ¾  ¾  ¾  ¾
 62  Fuel tank pressure  Fuel tank pressure sensor  Ignition switch ON  Fuel tank pressure 0 kPa {0 mmHg,

0 inHg}

 Approx. 2.5  
 Fuel tank pressure 1 kPa {7.5 mmHg,

0.3 inHg}

 Approx. 2.8
 63  Fuel tank level  Fuel gauge sender unit  Full fuel  0.2¾0.5  
  • Inspect fuel gauge sender unit

    (See Fuel Gauge )

  • Inspect related harness
 Half fuel  2.0¾2.8
 Empty fuel  3.4¾4.4
 64  Neutral position (MTX)  Neutral switch  Shift lever is at neutral position  Below 1.0  
 Shift lever is not at neutral position  B+
 Load/no load signal (ATX)  TR switch

(terminal H)

 Ignition switch ON  Selector lever is at P or N position  Below 1.0  
 Others  B+
 65  ¾  ¾  ¾  ¾  ¾
 66  ¾  ¾  ¾  ¾  ¾
 67  Purge control  Purge solenoid valve    
 68  EGR valve #1 coil control  EGR valve

(terminal E)

 Ignition switch ON  Below 1.0  
 Idle  Below 1.0
 69  ¾  ¾  ¾  ¾  ¾
 70  ¾  ¾  ¾  ¾  ¾
 71  Power supply  Main relay  Ignition switch ON  B+  
  • Inspect main relay

    (See RELAY INSPECTION )

  • Inspect EGI fuse
  • Inspect related harness
 Ignition switch OFF  Below 1.0
 72  EGR valve #2 coil control  EGR valve

(terminal A)

 Ignition switch ON  B+  
 Idle  B+
 73  VTCS control  VTCS solenoid valve  ECT above 67.5 °C {154 °F} while idling  B+  
 ECT below 67.5 °C {154 °F} and engine speed below 3,250 rpm  Below 1.0
 74  Fuel injection (#3)  Fuel injector No.3    
 75  Fuel injection (#1)  Fuel injector No.1    
 76  GND  GND  Under any condition  Below 1.0  
  • Inspect related harness
 77  GND  GND  Under any condition  Below 1.0  
  • Inspect related harness
 78*2  3rd gear light  Instrument cluster  Ignition switch ON  3rd gear  Below 1.0  
  • Inspect instrument cluster
  • Inspect related harness
 Others  Applox. 5
 79  K-LINE (serial communication)  DLC terminal KLN  Because this terminal is for serial communication, good/no good judgment by terminal voltage is not possible.  
  • Inspect related harness
 80  Fuel pump control  Fuel pump relay  Ignition switch ON  B+  
 Cranking  Below 1.0
 Idle  Below 1.0
 81*1  Pressure control solenoid control (-)  Pressure control solenoid    
 82*1  Shift solenoid A control  Shift solenoid A    
 83  IAC (-)  IAC valve    
 84*1  Input/turbine speed (+)  Input/turbine speed sensor    
 85  SGC(+)  CMP sensor    
 86  SGC(-)  CMP sensor    
 87  ¾  ¾  ¾  ¾  ¾
 88  MAF  MAF sensor  Ignition switch ON  0.9¾2.0  
 Idle  1.7¾2.4
 89  Throttle position  TP sensor  Ignition switch ON  CTP  0.1¾1.1  
 WOT  3.0¾4.6
 90  Constant voltage (Vref)  TP sensor, EGR boost sensor, Fuel tank pressure sensor  Ignition switch ON  Approx. 5.0  
  • Inspect related harness
 91  Sensor GND  ECT sensor, IAT sensor, EGR boost sensor, Fuel tank pressure sensor, TP sensor, HO2S (Front, Rear), TFT sensor  Under any condition  Below 1.0  
  • Inspect related harness
 92  Brake  Brake switch  Brake pedal depressed  B+  
 Brake pedal released  Below 1.0
 93  HO2S (Rear) heater control  HO2S (Rear)  Idle  ECT above 70 °C {158 °F}  Below 1.0  
 HO2S (Rear) is malfunctioning  B+
 94  HO2S (Front) heater control  HO2S (Front)  Ignition switch ON (engine stopped)  B+  
 Approx. 15 s after engine start with ECT 20¾30°C {68¾86 °F}  Below 1.0
 Others  Below 1.0 Û B+
 95  PRC  PRC solenoid valve  Ignition switch ON  B+  
 After hot start  Below 1.0
 96  A/C control  A/C relay  Idle  A/C switch and fan switch on  Below 1.0  
 A/C switch off  B+
 97  Power supply  Main relay  Ignition switch ON  B+  
 Ignition switch off  Below 1.0
 98  EGR boost sensor switching control  EGR boost solenoid valve  Ignition switch ON  B+  
 Idle  B+
 99*1  Shift solenoid B control  Shift solenoid B    
 100  Fuel injection (#4)  Fuel injector No.4    
 101  Fuel injection (#2)  Fuel injector No.2    
 102*1  Shift solenoid C Control  Shift solenoid C    
 103  GND  GND  Under any condition  Below 1.0  
  • Inspect related harness
 104*2  4th gear light  Instrument cluster  Ignition switch ON  4th gear  Below 1.0  
  • Inspect instrument cluster
  • Inspect related harness
 Others  Applox. 5

*1
ATX only
*2
For Sport AT
*3
For 4AT