ECM
Tech Tips
The standard voltage and resistance of each ECM terminal is shown in the table below.
In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol) " for the terminals to be inspected. The standard voltage and resistance between the terminals is shown under "Specific Condition".
Use the illustration above as a reference for the ECM terminals.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A58-1 (BATT) - B23-16 (E1) | Y - W-B | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| A58-2 (+B) - B23-16 (E1) | B - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A58-3 (+B2) - B23-16 (E1) | B - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A58-9 (STP) - B23-16 (E1) | G - W-B | Stop light switch assembly signal | Brake pedal depressed | 7.5 to 14 V |
| Brake pedal released | Below 1.5 V | |||
| A58-13 (CANH) - B23-16 (E1) | L - W-B | CAN communication line | Ignition switch ON | Pulse generation |
| A58-26 (CANL) - B23-16 (E1) | W - W-B | CAN communication line | Ignition switch ON | Pulse generation |
| A58-41 (S) - B23-16 (E1) | V - W-B | M position switch signal | Ignition switch ON and shift lever in M | 11 to 14 V |
| Ignition switch ON and shift lever not in M | Below 1 V | |||
| A58-42 (SFTU) - B23-16 (E1) | GR - W-B | Up-shift position switch signal | Ignition switch ON and shift lever in M | 11 to 14 V |
|
Below 1 V | |||
| A58-43 (SFTD) - B23-16 (E1) | P - W-B | Down-shift position switch signal | Ignition switch ON and shift lever in M | 11 to 14 V |
|
Below 1 V | |||
| A58-46 (MREL) - B23-16 (E1) | GR - W-B | EFI MAIN relay operation signal | Ignition switch ON | 11 to 14 V |
| A58-57 (PWMS) - B23-16 (E1) | L - W-B | Pattern select switch (SPORT) signal | Ignition switch ON and pattern select switch (SPORT) off | 11 to 14 V |
| Ignition switch ON and pattern select switch (SPORT) on | Below 1.5 V | |||
| B23-16 (E1) - Body ground | W-B | Ground | Always | Below 1 Ω |
| B23-29 (+BM) - B23-16 (E1) | GR - W-B | Power source of throttle actuator | Always | 11 to 14 V |
| B23-48 (SLU+) - B23-47 (SLU-) | V - R | Shift solenoid valve SLU signal | Lock-up turned from off to on | Pulse generation |
| B23-63 (NSW) - B23-16 (E1) | BE - W-B | Park/neutral position switch signal | Ignition switch ON and shift lever in P or N | Below 1 Ω |
| Ignition switch ON and shift lever not in P or N | 11 to 14 V | |||
| B23-67 (SLP+) - B23-66 (SLP-) | W - GR | Shift solenoid valve SLP signal | Engine idling | Pulse generation |
| B23-68 (SL) - B23-16 (E1) | P - W-B | Shift solenoid valve SL signal | Engine idling | Pulse generation |
| B23-71 (SC) - B23-16 (E1) | LG - W-B | Shift solenoid valve SC signal | Engine idling | Pulse generation |
| B23-72 (SLS-) - B23-73 (SLS+) | BE - V | Shift solenoid valve SLS signal | Engine idling | Pulse generation |
| B23-79 (R) - B23-16 (E1) | R - W-B | R position switch signal | Ignition switch ON and shift lever in R | 11 to 14 V |
| Ignition switch ON and shift lever not in R | Below 1 Ω | |||
| B23-81 (D) - B23-16 (E1) | L - W-B | D position switch signal | Ignition switch ON and shift lever in D or M | 11 to 14 V |
| Ignition switch ON and shift lever not in D and M | Below 1 V | |||
| B23-89 (PTO) - B23-121 (EPTO) | L - BE | Oil pressure sensor signal | Engine idling and shift lever in P | 0.8 to 1.2 V |
| B23-95 (THO1) - B23-96 (ETHO) | Y - B | CVT fluid temperature sensor signal | CVT fluid temperature: 60 to 120°C (140 to 248°F) | 0.2 to 1.0 V |
| B23-97 (N) - B23-16 (E1) | V - W-B | N position switch signal | Ignition switch ON and shift lever in N | 11 to 14 V |
| Ignition switch ON and shift lever not in N | Below 1 V | |||
| B23-99 (P) - B23-16 (E1) | P - W-B | P position switch signal | Ignition switch ON and shift lever in P | 11 to 14 V |
| Ignition switch ON and shift lever not in P | Below 1 V | |||
| B23-120 (VCPT) - B23-121 (EPTO) | V - BE | Power supply for oil pressure sensor signal | Ignition switch ON | 4.75 to 5.25 V |
| B23-125 (NTO) - B23-16 (E1) | G - W-B | Transmission revolution sensor (NT) signal | When driving with shift lever in D | Pulse generation |
| B23-126 (NTB) - B23-16 (E1) | B - W-B | Power supply for transmission revolution sensor (NT) | Ignition switch ON | 11 to 14 V |
| B23-127 (NIN+) - B23-128 (NIN-) | Y - LG | Transmission revolution sensor (NIN) signal | When driving with shift lever in D | Pulse generation |
| B23-129 (NOTO) - B23-16 (E1) | BE - W-B | Transmission revolution sensor (NOUT) signal | When driving with shift lever in D | Pulse generation |
| B23-130 (NOTB) - B23-16 (E1) | W - W-B | Power supply for transmission revolution sensor (NOUT) | Ignition switch ON | 11 to 14 V |