Test NTC-11A - Checking Pcm Power & Ground Circuits

NOTE: For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in this section.

PCM CONNECTOR A (BLACK) TERMINAL ⁽¹⁾

Cavity

Circuit I.D.

Function

N/A

A21

Fused Ignition Switch Output (Run/Start)

N/A

Sensor Ground

N/A

T41

⁽²⁾ Park/Neutral Position Switch Sense

K19

Ignition Coils No. 1. No. 6 Driver

K24

Crankshaft Posion Sensor Signal

N/A

A10

K60

Idle Air Control Motor No. 2 Driver

A11

K40

Idle Air Control Motor No. 2 Driver

A12

K10

⁽³⁾ Power Steering Pressure Switch Signal

A13

N/A

A14

N/A

A15

K21

Intake Air Temp. Sensor Signal

A16

Engine Coolant Temp. Sensor Signal

A17

5 Volt Supply

A18

K44

Camshaft Position Sensor Signal

A19

K39

Idle Air Control Motor No. 1 Driver

A20

K59

Idle Air Control Motor No. 4 Driver

A21

N/A

A22

A14

Fused B(+)

A23

K22

Throttle Position Sensor Signal

A24

K41

Upstream Heated Oxygen Sensor Signal

A25

K341

Downstream Heated Oxygen Sensor Signal

A26

N/A

A27

MAP Sensor Signal

A28

N/A

A29

N/A

A30

N/A

A31

Z12

Ground

A32

Z12

Ground

⁽¹⁾	See Figure.

⁽²⁾	With automatic transmission.

⁽³⁾	With Police Package

PCM CONNECTOR B (WHITE) TERMINAL ⁽¹⁾

Cavity

Circuit I.D.

Function

N/A

K11

Injector No. 1 Driver

K13

Injector No. 3 Driver

K38

Injector No. 5 Driver

N/A

B10

K20

Generator Field Driver

B11

K54

Torque Converter Clutch Solenoid Control

B12

K58

Injector No. 6 Driver

B13

N/A

B14

N/A

B15

K12

Injector No. 2 Driver

B16

K14

Injector No. 4 Driver

B17

N/A

B18

N/A

B19

N/A

B20

N/A

B21

N/A

B22

N/A

B23

N/A

B24

N/A

B25

N/A

B26

N/A

B27

Vehicle Speed Sensor Signal

B28

N/A

B29

N/A

B30

N/A

B31

5 Volt Supply

B32

N/A

⁽¹⁾	See Figure.

PCM CONNECTOR C (GRAY) TERMINAL ⁽¹⁾

Cavity

Circuit I.D.

Function

C13

A/C Compressor clutch Relay Control

C27

Radiator Fan Relay Control

K51

Automatic Shut Down Relay Control

V36

Speed Control Vacuum Solenoid Contol

V35

Speed Control Vent Solenoid Control

N/A

C10

N/A

C11

V32

12 Volt Supply

C12

A142

Automatic Shut Down Relay Output

C13

N/A

C14

N/A

C15

K118

Battery Temperature Sensor Signal

C16

G14

Generator Lamp Driver

C17

Malfunction Indicator Lamp Driver

C18

N/A

C19

K31

Fuel Pump Relay Control

C20

K52

Evap/Purge Solenoid Control

C21

N/A

C22

C21

A/C Switch Sense

C23

C90

A/C Select Signal

C24

K29

Stop Lamp Switch Sense

C25

N/A

C26

Fuel Level Sense

C27

D21

SCI Transmit

C28

CCD Bus (-)

C29

D20

SCI Receive

C30

CCD Bus (+)

C31

G21

Tachometer Signal

C32

V33

Speed Control Switch Sense

⁽¹⁾	See Figure.

Turn ignition off. Disconnect Powertrain Control Module (PCM) Black connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A . If connector and terminals are okay, go to next step.
Using scan tool in ohmmeter mode, check resistance of PCM Black connector terminal No. 31, ground circuit (Black/Tan wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A. If resistance is less than 5 ohms, go to next step.
Using scan tool in ohmmeter mode, check resistance of PCM Black connector terminal No. 32, ground circuit (Black/Tan wire). If resistance is 5 ohms or more, repair open ground circuit and perform TEST VER-2A . If resistance is less than 5 ohms, go to next step.
Using scan tool in voltmeter mode, check voltage on of PCM Black connector, fused B+ circuit (Red wire). If voltage is 10 volts or less, repair open B+ circuit and perform TEST VER-2A. If voltage is more than 10 volts, go to next step.
Turn ignition on. Check voltage on PCM Black connector, ignition switch output circuit (Dark Blue wire). If voltage is 10 volts or less, repair open ignition switch output circuit and perform TEST VER-2A . If voltage is more than 10 volts, turn ignition off. Reconnect PCM connector. PCM ground and power circuits are operating properly. Test passed.