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Terminals Of ECM

Fig 1: Identifying Terminals Of ECM
G05109984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The standard voltage of each ECM terminal is shown in the table below.

In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specified Condition".

Use the illustration above as a reference for the ECM terminals.

Standard voltage 

STANDARD VOLTAGE

Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
STP (E47-15) - E1 (B3-1) G-Y - BR Stop light switch signal Brake pedal is depressed 7.5 to 14 V
Brake pedal is released Below 1.5 V
L (E46-9)-E1 (B3-1) B-L - BR L shift position switch signal Ignition switch ON and shift lever L position 11 to 14 V
Ignition switch ON and. shift lever other than L position Below 1 V
2 (E46-10)-E1 (B3-1) G-R - BR 2 shift position switch signal Ignition switch ON and shift lever 2 or L positions 11 to 14 V
Ignition switch ON and shift lever other than 2 and L positions Below 1 V
R (E46-11)-E1 (B3-1) R-Y - BR R shift position switch signal Ignition switch ON and shift lever R position 11 to 14 V
Ignition switch ON and shift lever other than R position Below 1 V
3 (E46-19)-E1 (B3-1) W-R - BR 3 shift position switch signal Ignition switch ON and shift lever 3 position 11 to 14 V
Ignition switch ON and shift lever other than 3 position Below 1 V
4 (E46-20)-E1 (B3-1) B-O - BR 4 shift position switch signal Ignition switch ON and shift lever 4 position 11 to 14 V
Ignition switch ON and shift lever other than 4 position Below 1 V
D (E46-21)-E1 (B3-1) V - BR D shift position switch signal Ignition switch ON and shift lever D or 4 positions 11 to 14 V
Ignition switch ON and shift lever other than D and 4 positions Below 1 V
L4 (B3-13)-E1 (B3-1) W-L - BR Transfer L4 shift position switch signal Ignition switch ON and transfer high and low shift lever L position Below 1 V
Ignition switch ON and transfer high and low shift lever other than L position 11 to 14 V
TFN (B2-25)-E1 (B3-1) W - BR N shift position switch signal Ignition switch ON and transfer high and low shift lever N position Below 1 V
Ignition switch ON and transfer high and low shift lever other than N position 11 to 14 V
NSW (B2-8)-E1 (B3-1) L-Y - BR Park or neutral shift position switch signal Ignition switch ON and shift lever P or N positions Below 2 V
Ignition switch ON and shift lever other than P and N positions 11 to 14 V
SR (B2-9) - E1 (B3-1) P-L - BR SR solenoid signal 5th gear 11 to 14 V
1st gear Below 1 V
S2 (B2-10)-E1 (B3-1) W-L - BR S2 solenoid signal 2nd or 3rd gear 11 to 14 V
1st, 4th or 5th gear Below 1 V
S1 (B2-11)-E1 (B3-1) GR - BR S1 solenoid signal 1st or 2nd gear 11 to 14 V
3rd, 4th or 5th gear Below 1 V
SLT+ (B2-13) - SLT- (B2-12) LG-B - L-R SLT solenoid signal Engine is idling Pulse generation (see  1waveform 1)
SLU+ (B2-15) - SLU- (B2-14) R-B - R-W SLU solenoid signal 5th (lock-up) gear Pulse generation (see  2waveform 2)
SL2+ (B2-17) - SL2- (B2-16) B-W - B-R SL2 solenoid signal Engine idling speed Pulse generation (see  3waveform 3)
SL1+ (B2-19) - SL1- (B2-18) G-B - B-Y SL1 solenoid signal Engine idling speed Pulse generation (see  4waveform 4)
THO2 (B2-32) - E2 (B1-28) L - W-G No. 2 ATF temperature sensor signal ATF temperature: 115°C (239°F) or more Below 1.5 V
THO1 (B2-24) - E2 (B1-28) Y-G - W-G No. 1 ATF temperature sensor signal ATF temperature: 115°C (239°F) or more Below 1.5 V
SP2+ (B2-34) - SP2- (B2-26) Y - L Speed sensor (SP2) signal Vehicle speed 12 mph (20 km/h) Pulse generation (see  5waveform 5)
NT+ (B2-35) - NT- (B2-27) P - V Speed sensor (NT) signal Engine is idling Pulse generation (see  6waveform 6)
  1. Waveform 1 
    WAVEFORM 1 REFERENCE

    Item Condition
    Terminal SLT+ - SLT-
    Tool setting 5 V/DIV, 1 ms/DIV
    Vehicle condition Engine idling speed
    Fig 2: Waveform Graph - 1
    G05190690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Waveform 2 
    WAVEFORM 2 REFERENCE

    Item Condition
    Terminal SLU+ - SLU-
    Tool setting 5 V/DIV, 1 ms/DIV
    Vehicle condition 5th (lock-up) gear
    Fig 3: Waveform Graph - 2
    G05190689Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Waveform 3 
    WAVEFORM 3 REFERENCE

    Item Condition
    Terminal SL2+ - SL2-
    Tool setting 5 V/DIV, 1 ms/DIV
    Vehicle condition Engine idling speed
    Fig 4: Waveform Graph - 3
    G05578760Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Waveform 4 
    WAVEFORM 4 REFERENCE

    Item Condition
    Terminal SL1+-SL1-
    Tool setting 5 V/DIV, 1 ms/DIV
    Vehicle condition Engine idling speed
    Fig 5: Waveform Graph - 4
    G05190690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Waveform 5 
    WAVEFORM 5 REFERENCE

    Item Condition
    Terminal SP2+ - SP2-
    Tool setting 2 V/DIV, 2 ms/DIV
    Vehicle condition Vehicle speed 12 mph (20 km/h)
    Fig 6: Waveform Graph - 5
    G05110014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Waveform 6 
    WAVEFORM 6 REFERENCE

    Item Condition
    Terminal NT+ - NT-
    Tool setting 2 V/DIV, 2 ms/DIV
    Vehicle condition Engine idling speed
    Fig 7: Waveform Graph - 6
    G05109990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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