Test TC-1A - Checking For DTCS

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION at beginning of article. For wiring diagrams, see WIRING DIAGRAMS at the end of this article. Perform TEST VER-2A after each repair.

Battery must be fully charged before proceeding. Attempt to start engine. Crank engine for at least 10 seconds if necessary. Connect scan tool to engine Data Link Connector (DLC). Using scan tool, display and record trouble code messages. If scan tool displays NO RESPONSE, go to TEST NS-6A .
If scan tool has a blank screen or displays RAM TEST FAILURE, CARTRIDGE ERROR, KEY PAD TEST FAILURE, LOW BATTERY or HIGH BATTERY, scan tool failure is indicated. Ensure DLC ground circuit (Black/White wire) is good. If ground circuit is okay, go to next step.
Replace scan tool cable, cartridge and scan tool until condition is corrected. For more scan tool problem diagnostics, see G - BODY CONTROL COMPUTER - VEHICLE COMMUNICATIONS article in ENGINE PERFORMANCE section.
If trouble code messages are displayed, see SCAN TOOL DIAGNOSTIC TROUBLE CODES/MESSAGES table. If no trouble code messages are displayed and a driveability problem is present, go to TEST NTC-1A . If no trouble code messages are displayed and a no-start problem is present, go to TEST NS-1A . If no trouble code messages are displayed and a charging system problem is present, see GENERATORS - NIPPONDENSO article in the ELECTRICAL section. If no trouble code messages are displayed and a cruise control system problem is present, see CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT section.

SCAN TOOL DIAGNOSTIC TROUBLE CODES/MESSAGES

DTC

Scan Tool Message

Test No.

Code 11

NO CRANK REFERENCE SIGNAL AT PCM

TC-2A

Code 54

NO CAM SYNC SIGNAL AT PCM

TC-3A

Code 13

SLOW CHANGE IN IDLE MAP SENSOR SIGNAL

TC-4A

Code 13

NO OR SLOW CHANGE IN MAP FROM START TO RUN

TC-4A

Code 14

MAP SENSOR VOLTAGE TOO LOW

TC-5A

Code 14

MAP SENSOR VOLTAGE TOO HIGH

TC-6A

Code 15

NO VEHICLE SPEED SENSOR SIGNAL

TC-7A

Code 21

O2S STAYS AT CENTER

TC-8A

Code 21

O2S SHORTED TO VOLTAGE

TC-9A

Code 52

O2S STAYS ABOVE CENTER (RICH)

TC-10A

Code 51

O2S STAYS BELOW CENTER (LEAN)

TC-11A

Code 22

ECT SENSOR VOLTAGE TOO HIGH

TC-12A

Code 22

ECT SENSOR VOLTAGE TOO LOW

TC-13A

Code 23

INTAKE AIR TEMP SENSOR VOLTAGE LOW

TC-14A

Code 23

INTAKE AIR TEMP SENSOR VOLTAGE HIGH

TC-15A

Code 24

THROTTLE POSITION SENSOR VOLTAGE HIGH

TC-16A

Code 24

THROTTLE POSITION SENSOR VOLTAGE LOW

TC-17A

Code 25

IDLE AIR CONTROL MOTOR CIRCUITS

TC-18A

Code 27

INJECTOR CONTROL CIRCUIT

TC-19A

Code 33

A/C CLUTCH RELAY CIRCUIT

TC-25A

Code 35

RAD FAN CONTROL RELAY CIRCUIT

TC-26A

Code 42

AUTO SHUTDOWN RELAY CONTROL CIRCUIT

TC-27A

Code 42

NO ASD RELAY VOLT SENSE AT PCM

TC-28A

Code 62

PCM FAILURE SRI MILE NOT STORED

TC-29A

Code 63

PCM FAILURE EEPROM WRITE DENIED

TC-30A

Code 37

TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT

TC-37A

Code 31

EVAP SOLENOID CIRCUIT

TC-38A

Code 44

BATTERY TEMP SENSOR VOLTS OUT OF LIMIT

⁽¹⁾

Code 47

CHARGING SYSTEM VOLTAGE TOO LOW

⁽¹⁾

Code 46

CHARGING SYSTEM VOLTAGE TOO HIGH

⁽¹⁾

Code 41

GENERATOR FIELD NOT SWITCHING PROPERLY

⁽¹⁾

Code 17

ENGINE IS COLD TOO LONG

⁽²⁾

Code 53

INTERNAL CONTROLLER FAILURE

⁽³⁾

Code 53

PCM FAILURE SRI COMMUNICATIONS

⁽³⁾

Code 34

SPEED CONTROL SOLENOID CIRCUITS

⁽⁴⁾

⁽¹⁾	See GENERATORS - NIPPONDENSO article in ELECTRICAL section.

⁽²⁾	Check cooling system if engine temperature does not reach 176°F (80°C) after driving 20 minutes. This may be caused by a faulty thermostat. This code may set in error during very cold slow speed driving.

⁽³⁾	Replace PCM and perform TEST VER-2A.

⁽⁴⁾	See CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT section.