CHECK ECM
Tech Tips
The standard voltage, resistance and waveform between each pair of the ECM 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 ECM terminal locations.
| Terminal No. (Symbols) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A173-9 (STP) - B208-53 (E1) | L - W-B | Stop light switch assembly signal | Brake pedal depressed | 11 to 14 V |
| A173-9 (STP) - B208-53 (E1) | L - W-B | Stop light switch assembly signal | Brake pedal released | Below 1 V |
| A173-10 (ST1-) - B208-53 (E1) | R - W-B | Stop light switch assembly signal | Ignition switch ON and brake pedal depressed | Below 1 V |
| A173-10 (ST1-) - B208-53 (E1) | R - W-B | Stop light switch assembly signal | Ignition switch ON and brake pedal released | 11 to 14 V |
| A173-33 (TC) - B208-53 (E1) | P - W-B | Terminal TC of DLC3 | Engine stopped and ignition switch ON | 11 to 14 V |
| A173-42 (SFTU) - B208-53 (E1) | W - W-B | Up-shift position switch signal | Ignition switch ON and shift lever in M | 11 to 14 V |
| A173-42 (SFTU) - B208-53 (E1) | W - W-B | Up-shift position switch signal | Ignition switch ON and shift lever in "+" | Below 1 V |
| A173-43 (SFTD) - B208-53 (E1) | R - W-B | Down-shift position switch signal | Ignition switch ON and shift lever in M | 11 to 14 V |
| A173-43 (SFTD) - B208-53 (E1) | R - W-B | Down-shift position switch signal | Ignition switch ON and shift lever in "-" | Below 1 V |
| A173-55 (CCS) - A173-41 (ECCS) | SB - BR | Cruise control main switch circuit | Cruise control main switch (ON-OFF button) not pushed | 10 kΩ or higher |
| A173-55 (CCS) - A173-41 (ECCS) | SB - BR | Cruise control main switch circuit | Cruise control main switch (ON-OFF button) pushed | Below 2.5 Ω |
| A173-55 (CCS) - A173-41 (ECCS) | SB - BR | Cruise control main switch circuit | +/RES switch ON | 235 to 245 Ω |
| A173-55 (CCS) - A173-41 (ECCS) | SB - BR | Cruise control main switch circuit | -/SET switch ON | 617 to 643 Ω |
| A173-55 (CCS) - A173-41 (ECCS) | SB - BR | Cruise control main switch circuit | CANCEL switch ON | 1509 to 1571 Ω |
| A173-59 (S) - B208-53 (E1) | L - W-B | M shift position signal | Ignition switch ON and shift lever in M | 11 to 14 V |
| A173-59 (S) - B208-53 (E1) | L - W-B | M shift position signal | Ignition switch ON and shift lever not in M | Below 1 V |
| B208-34 (D) - B208-53 (E1)*1 | GR - W-B | D shift position signal | Ignition switch ON and shift lever in D or M | 11 to 14 V |
| B208-34 (D) - B208-53 (E1)*1 | GR - W-B | D shift position signal | Ignition switch ON and shift lever not in D or M | Below 1 V |
| B208-34 (D) - B208-53 (E1)*2 | GR - W-B | Clutch switch signal | Ignition switch ON and clutch pedal depressed | Below 1 V |
| B208-34 (D) - B208-53 (E1)*2 | GR - W-B | Clutch switch signal | Ignition switch ON and clutch pedal released | 11 to 14 V |
*1: for CVT
*2: for Manual Transaxle