TCCS Resistance Tests
The TCCS can be checked using an ohmmeter. Before making resistance tests, turn ignition off and disconnect wiring connectors at ECU. Insert ohmmeter probes into wiring connectors from wire side. Measure resistance at connector terminals, NOT at ECU terminals.
TCCS TROUBLE CODE IDENTIFICATION
| Code No. (Pattern) | Circuit Affected | ||
|---|---|---|---|
| 1 | System Normal | ||
| 11 | ECU Power Source | ||
| 12 & 13 | RPM Signal | ||
| 14 | Ignition Signal | ||
| 21 | Oxygen Sensor Signal | ||
| 22 | Coolant Temperature Signal | ||
| 23 | Intake Air Temperature Signal | ||
| 31 | Airflow Meter Signal | ||
| 32 | Airflow Meter Signal | ||
| 41 | (1) PTS Signal | ||
| 42 | VSS Signal | ||
| 43 | Start Signal | ||
| 51 | (1) Switch Signal | ||
| 52 | Knock Sensor Signal | ||
| 53 | Knock CPU (ECU) | ||
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TROUBLE CODES & PROBABLE CAUSE
| Code No. | Probable Cause |
|---|---|
| 11 | Main Relay Or Circuit, ECU |
| 12 & 13 | Distributor Or Circuit, Starter Signal Circuit, ECU |
| 14 | Ignitor Or Circuit, ECU |
| 21 | Oxygen Sensor Or Circuit, ECU |
| 22 | Coolant Temp. Sensor Or Circuit, ECU |
| 23 & 24 | Intake Air Temperature Sensor Or Circuit, ECU |
| 31 & 32 | Airflow Meter Or Circuit, ECU |
| 41 | Throttle Position Sensor Or Circuit, ECU |
| 42 | Vehicle Speed Sensor Or Circuit, Slipping Torque Converter, ECU |
| 43 | Main Relay Circuit, Starter Circuit, Ignition Circuit, ECU |
| 51 | Neutral/Start Switch, A/C Switch, ECU |
| 52 | Knock Sensor Or Circuit, ECU |
| 53 | ECU |