ECM Terminal Arrangement
NOTE:
- Regarding the collation ECM (smart key ECM assembly) (entry function related), refer to the following. (Refer to DIAGNOSIS SYSTEM )
- Regarding the ID code box (immobilizer code ECM), refer to the following. (Refer to ECM TERMINAL ARRANGEMENT )
- Regarding the steering lock actuator assembly (steering lock ECM), refer to the following. (Refer to ECM TERMINAL ARRANGEMENT )
- Check the collation ECM (smart key ECM assembly).
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- Remove the D41 and the D48 connectors of the collation ECM (smart key ECM assembly).
- Measure the voltage and resistance according to the following table.SYMBOL TERMINAL DESCRIPTION
Terminal No. (Terminal symbol) Input/Output Terminal description Conditions Specified condition Related [Current Data Display & Save] item D41-4 (ACCD) - chassis ground Output ACC signal 20°C (68°F) 81.49 to 118.98 Ω [ACC relay monitor] D41-6 (IG1D) - chassis ground Output IG1 signal 20°C (68°F) 40.74 to 54.49 Ω IG1 relay monitor (outside)] D41-25 (P) - D48-11 (GND)(1) Input Shift lever P position signal The shift lever is in the P position →the shift lever is not in the P position 40 kΩ or more →200 Ωor less [Shift P Signal] D41-26 (SLP) - D48-11 (GND) Input Steering lock bar position signal Always 10 kΩ or more [Steering unlock SW] D41-27 (SPD) - chassis ground Input Vehicle speed signal Always 30 kΩ or more [Vehicle Speed] D41-28 (SSW1) - chassis ground Input SSW1 contact signal The engine switch is being pushed →the engine switch is not being pushed 1 Ωor less →10 kΩ or more [Start switch1] D41-30 (SSW2) - chassis ground Input SSW2 contact signal (Back-up for SSW1, and works in the same way as SSW1) NOTE: Back-up of SSW1. Works in the same way as SSW1.The engine switch is being pushed →the engine switch is not being pushed 1 Ωor less →10 kΩ or more [Start switch2] D48-11 (GND) - chassis ground - Ground Always 1 Ωor less - D48-5 (N-SW) - chassis ground (1) Input Neutral switch signal Shift position P or N →Other than P or N 1V or less →9 V or more [Neutral SW/Clutch SW] D48-10 (CLUT) - chassis ground (2) Input Clutch switch signal Except for when the engine in cranking, perform the following operations: remove your foot from the clutch pedal →depress the clutch pedal 1V or less →9 V or more [Neutral SW/Clutch SW] D48-9 (IG2D) - chassis ground Output IG2 signal 20°C (68°F) 74.15 to 460.88 Ω [IG2 relay monitor (outside)] D48-2 (+B) - chassis ground Input +B power supply Always 11 to 14 V - D48-17 (TACH) - chassis ground Input Engine speed signal Always 10 kΩ or more [Engine conditions] D48-18 (STP1) - chassis ground (1) Input Stop light switch signal Remove your foot from the brake pedal →depress the brake pedal 1V or more →9V or less [Stop Light Switch 1] (1) With automatic transmission (2) Manual transmission If you cannot get the specified result, there could be a problem in the wiring harnesses.
- Reconnect the D41 and the D48 connectors of the collation ECM (smart key ECM assembly).
- Refer to the table below and measure the voltage and check for a pulse.SYMBOL TERMINAL DESCRIPTION
Terminal No. (Terminal symbol) Input/Output Terminal description Conditions Specified condition Related [Current Data Display & Save] item D41-25 (P) - D48-11 (GND) (1) Input Shift lever P position signal The shift lever is in the P position →the shift lever is not in the P position 1.5V or more →9V or less [Shift P Signal] D41-4 (ACCD) - D48-11 (GND) Output ACC signal Engine switch off →Engine switch on (ACC) 1V or less →8.5V or more [ACC relay monitor] D41-6 (IG1D) - D48-11 (GND) Output IG1 signal Engine switch on (ACC) →Engine switch on (IG) 1V or less →9 V or more [IG1 relay monitor (outside)] D41-26 (SLP) - D48-11 (GND) Input Steering lock bar position signal Steering wheel lock →Steering wheel unlock (3) 11 to 14 V →1.2 V or less [Steering unlock SW] D41-27 (SPD) - D48-11 (GND) Input Vehicle speed signal The engine switch on (IG), the vehicle running at approx. 5 km/h {3 MPH} Pulse generation (Refer to Fig 2 waveform 1) [Vehicle Speed] D41-28 (SSW1) - D48-11 (GND) Input Engine switch signal The engine switch is not being pushed →the engine switch is being pushed 9 V or more →1 V or less [Start switch1] D41-29 (SLR+) - D48-11 (GND) Output Steering lock motor drive command (motor drive permission signal sent from the collation ECM (smart key ECM assembly)) Steering lock motor is operated →steering lock motor does not operate →steering lock motor operates (4) Pulse generation (Refer to Fig 3 waveform 2) - D41-30 (SSW2) - D48-11 (GND) Input SSW2 contact signal NOTE: Back-up of SSW1. Works in the same way as SSW1.The engine switch is not being pushed →the engine switch is being pushed 9 V or more →1 V or less [Start switch2] D48-7 (STSW) - D48-11 (GND) Output Starter request signal Depress the brake pedal (1) or the clutch pedal (2) and press the engine switch (starter on)→ After approx. 1 second, the engine switch is released (starter off) 2V or less →9 V or more Starter request signal D48-5 (N-SW) - chassis ground (1) Input Neutral switch signal Shift position P or N →Other than P or N 1V or less →9 V or more [Neutral SW/Clutch SW] D48-10 (CLUT) - chassis ground (2) Input Clutch switch signal Except for when the engine in cranking, perform the following operations: remove your foot from the clutch pedal →depress the clutch pedal 1V or less →9 V or more [Neutral SW/Clutch SW] D40-28 (ACCR) - D48-11 (GND) Input ACC Relay Cut Signal Depress the brake pedal (1) or the clutch pedal (2) and press the engine switch (starter on)→ After approx. 1 second, the engine switch is released (starter off) 2V or less →9 V or more ACC Relay Cut Signal D48-17 (TACH) - D48-11 (GND) Input Clutch shift position sensor signal Idle revolutions after the engine is warmed up Pulse generation (Refer to Fig 4 waveform 3) [Engine conditions] D48-9 (IG2D) - D48-11 (GND) Output IG2 signal Engine switch on (ACC) →Engine switch on (IG) 1V or less →9 V or more [IG2 relay monitor (outside)] D48-18 (STP1) - D48-11 (GND)(1) Input Stop light switch signal Remove your foot from the brake pedal →depress the brake pedal 1V or less →9 V or more [Stop Light Switch 1] (1) With automatic transmission (2) With manual transmission NOTE:(3) When the shift lever is in P (with automatic transmission), if a door is opened or closed with the engine switch off, the steering is locked. If the key is in the vehicle interior and the engine switch is on (ACC) or on (IG), the steering is unlocked. (4) If all the following conditions are met, the steering lock motor operates and the door opens. - The shift lever is in P (for automatic transmission).
- Holding the electrical key transmitter sub-assembly, turn the engine switch on (IG), and after unlocking the steering, turn the engine switch off.
- Using an oscilloscope, check the ECM waveform.CAUTION: The oscilloscope waveform shown in the figure is an example for reference. The noise and chattering are not shown in the figure.
- Waveform 1 (reference)
Item Contents Tester connection D41-27 (SPD) - D48-11 (GND) Tool setting 5 V/DIV., 100 ms./DIV. Conditions The engine switch on (IG), the vehicle running at approx. 5 km/h {3 MPH} NOTE: The faster the vehicle speed, the shorter the wavelength becomes. - Waveform 2 (reference)
Item Contents Tester connection D41-29 (SLR+) - D48-11 (GND) Tool setting 2V/DIV., 200ms./DIV. Conditions Steering lock motor is operated →steering lock motor does not operate →steering lock motor operates (1) NOTE:(1) If all the following conditions are met, the steering lock motor operates when a door is opened. - The shift lever is in P. *
- *: for automatic transmission
- When you turn the engine switch on (IG) holding the electrical key transmitter sub-assembly, the handle is unlocked.
- The engine switch is off.
- The shift lever is in P. *
- Waveform 3 (reference)
Item Contents Tester connection D48-17 (TACH) - D48-11 (GND) Tool setting 2 V/DIV., 2 ms./DIV. Conditions Idle revolutions after the engine is warmed up NOTE: The faster the engine speed, the shorter the wavelength becomes.
- Waveform 1 (reference)
- Check ECM
- Refer to the table below and measure the resistance and the voltage and check for a pulse.
Terminal No. (Terminal symbol) Input/Output Terminal description Conditions Specified condition Related [Current Data Display & Save] item A36-4 (GNDEG1) - chassis ground - Ground Always 1 Ωor less - A33-14 (STSW2) - A36-4 (GNDEG1) Input Starter switch signal Engine switch is ON (IG) 1 V or less [Starter control] Cranking 6 to 13V A33-16 (NEUT) - A36-4 (GNDEG1) Input Neutral switch signal The engine switch is on (IG), the shift lever is not in P or N. 10 to 13V - The engine switch is on (IG), the shift lever is in P or N. 1 V or less A33-17 (START) - A36-4 (GNDEG1) Input Starter request signal Engine switch is ON (IG) 1 V or less - Cranking 6V or more A35-15 (TACHO) - A36-4 (GNDEG1) Output Engine speed signal Idle revolutions after the engine is warmed up Pulse generation (Refer to Fig 2 waveform 1) Engine speed A35-26 (STRLY) - A36-4 (GNDEG1) Output Starter relay signal Engine switch is ON (IG) 11 to 14 V →1V or less [Starter signal] Cranking 1 V or less A35-32 (ACCR) - A36-4 (GNDEG1) Output ACC Relay Cut Signal Engine switch is ON (IG) 10 to 13V - Cranking 1 V or less A35-34 (STCTRLY) - A36-4 (GNDEG1) Output Starter relay cut signal Engine switch is ON (IG) 10 to 13V [Starter cut relay] Cranking 1 V or less If you cannot get the specified result, there could be a problem in the ECM.
- Inspect using an oscilloscope.CAUTION: The waveform shown in the figure is an example for reference. The noise and chattering are not shown in the figure.
- Refer to the table below and measure the resistance and the voltage and check for a pulse.