CHECK HYBRID VEHICLE CONTROL ECU
Tech Tips
The standard voltage, resistance and waveform between each pair of the hybrid vehicle control ECU terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as displayed in the Specified Condition column. The illustration above can be used as a reference to identify the hybrid vehicle control ECU terminal locations.
| Terminal No. (Symbols) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A48-26 (DB1) - F3-4 (E12) | W - W-B | Shift lever position signal | Power switch on (IG), shift lever in D or B | 11 to 14 V |
| Power switch on (IG), shift lever not in D or B | Below 1 V | |||
| A48-14 (DB2) - F3-4 (E12) | G - W-B | Shift lever position signal | Power switch on (IG), shift lever in D or B | 11 to 14 V |
| Power switch on (IG), shift lever not in D or B | Below 1 V | |||
| A49-15 (STP) - F3-4 (E12) | SB - W-B | Stop light signal | Brake pedal depressed | 11 to 14 V |
| Brake pedal released | Below 1 V | |||
| F3-3 (BATT) - F3-4 (E12) | B - W-B | Constant power source | Power switch off | 11 to 14 V |
| F2-28 (CCS) - F3-4 (E12) | R - W-B | Cruise control main switch circuit | Cruise control main switch off | 10 MΩ or higher |
| Cruise control main switch on | Below 1.5 Ω | |||
| +RES switch ON | 235 to 245 Ω | |||
| -SET switch ON | 617 to 643 Ω | |||
| CANCEL switch ON | 1509 to 1571 Ω | |||
| A48-28 (ST1-) - F3-4 (E12) | R - W-B | Stop light signal | Power switch on (IG), brake pedal depressed | Below 1 V |
| Power switch on (IG), brake pedal released | 11 to 14 V | |||
| F3-4 (E12) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |