Toyota Corolla Cross: Terminals Of Ecu
TERMINALS OF ECU
COMBINATION METER ASSEMBLY
(a) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
I4-1 (EP) - Body ground |
Ground | Always |
Below 1 Ω |
|
I4-2 (ES) - Body ground |
Ground | Always |
Below 1 Ω |
|
I4-5 (B) - Body ground |
Auxiliary battery | Ignition switch off |
11 to 14 V |
|
I4-6 (IG+) - Body ground |
Ignition switch signal |
Ignition switch off | Below 1 V |
|
Ignition switch ON | 11 to 14 V | ||
|
I4-8 (+S) - Body ground |
Vehicle speed output signal |
Ignition switch ON, wheel being rotated |
Pulse generation (See waveform 1) |
|
I4-11 (SW) - Body ground*1 |
Brake fluid level warning switch signal |
Ignition switch ON, brake fluid level not low (brake warning light/red (malfunction) off) → low (brake warning light/red (malfunction) on) |
11 to 14 V → Below 1 V |
|
I4-12 (HZSW) - Body ground |
Hazard warning signal switch signal |
Hazard warning signal switch off → on |
11 to 14 V → Below 1 V |
|
I4-13 (WLVL) - Body ground*2 |
Washer fluid level signal |
Ignition switch ON, washer fluid level not low → low |
11 to 14 V → Below 1 V |
|
I4-14 (OILW) - Body ground |
Engine oil level sensor signal |
Ignition switch ON, engine oil level not low → low |
Below 1 V → 11 to 14 V |
|
I4-22 (BKSW) - Body ground |
Stop light signal input |
Stop light switch assembly on → off (Brake pedal depressed → released) |
11 to 14 V → 1.5 V or less |
|
I4-25 (SI) - Body ground |
Vehicle speed input signal |
Ignition switch ON, wheel being rotated |
Pulse generation (See waveform 1) |
|
I4-29 (BKL) - Body ground |
Driver seat belt buckle switch signal |
Ignition switch ON, driver seat belt unfastened → fastened |
Below 1 V → 11 to 14 V |
|
I5-2 (B) - Body ground |
Auxiliary battery | Ignition switch off |
11 to 14 V |
|
I5-5 (LL) - Body ground |
Front turn signal flasher signal (LH side) |
Turn indicator light (LH) blinking |
11 to 14 V → Below 1 V |
|
Turn indicator light (LH) off |
Below 1 V | ||
|
I5-6 (LR) - Body ground |
Front turn signal flasher signal (RH side) |
Turn indicator light (RH) blinking |
11 to 14 V → Below 1 V |
|
Turn indicator light (RH) off |
Below 1 V | ||
|
I5-7 (FR) - I5-25 (FE&B) |
Fuel level signal | Ignition switch ON, fuel receiver gauge indicates F → E (fuel level warning light on) |
Pulse generation (See waveform 3) |
|
I5-10 (TC) - Body ground |
Tail cancel switch signal |
Ignition switch ON, light control rheostat knob not fully turned upward (Tail cancel switch off) → fully turned upward (Tail cancel switch on) |
Below 1 V → 4 to 6 V |
|
I5-11 (SW1) - Body ground |
Light control rheostat (Power source) |
Ignition switch ON | 4 to 6 V |
|
I5-12 (MSTI) - Body ground |
Steering pad switch signal |
Ignition switch ON, up, down, left and right switches on steering pad switch not pushed |
4.8 to 5.2 V |
|
I5-14 (CANL) | CAN communication signal |
- | - |
|
I5-15 (TX-) | Local bus communication signal |
- | - |
|
I5-21 (TRNR) - Body ground |
Side/rear turn signal flasher signal (RH side) |
Turn indicator light (RH) blinking |
11 to 14 V → Below 1 V |
|
Turn indicator light (RH) off |
Below 1 V | ||
|
I5-22 (TRNL) - Body ground |
Side/rear turn signal flasher signal (LH side) |
Turn indicator light (LH) blinking |
11 to 14 V → Below 1 V |
|
Turn indicator light (LH) off |
Below 1 V | ||
|
I5-23 (FV) - Body ground |
Power source for fuel sender gauge |
Ignition switch ON | Pulse generation (See waveform 2) |
|
I5-24 (FR2) - I5-25 (FE&B)*3 |
Fuel level signal | Ignition switch ON, fuel level full → low (fuel level warning light on) |
Pulse generation (See waveform 3) |
|
I5-25 (FE&B) - Body ground |
Ground for fuel sender gauge |
Always | Below 1 Ω |
|
I5-26 (SW3) - Body ground |
Ground for trip switch |
Always | Below 1 Ω |
|
I5-28 (SW2) - Body ground |
Light control rheostat signal |
Ignition switch ON, light control rheostat knob fully turned downward → fully turned upward |
Below 1 V → 4 to 6 V (Gradually change) |
|
I5-29 (MSM+) - Body ground |
Steering pad switch signal |
Ignition switch ON, OK and back switches on steering pad switch not pushed |
4.8 to 5.2 V |
|
I5-31 (CANH) | CAN communication signal |
- | - |
|
I5-32 (TX+) | Local bus communication signal |
- | - |
- *1: for Gasoline Model
- *2: w/ Washer Fluid Level Warning System
- *3: for AWD
(b) Check for pulses according to the value(s) in the table below.
- Waveform 1:
Item
Condition
Tester connection
- I4-25 (SI) - Body ground
- I4-8 (+S) - Body ground
Tool setting
5 V/DIV., 20 ms./DIV.
Condition
Ignition switch ON, wheel being rotated
HINT:
When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.
Waveform 2:
Item
Condition
Tester connection
I5-23 (FV) - Body ground
Tool setting
2.5 V/DIV., 20 ms./DIV.
Condition
Ignition switch ON
Specified Condition
4.5 to 5.5 V
- Waveform 3:
Item
Condition
*1: for AWD Tester connection
- I5-7 (FR) - I5-25 (FE&B)
- I5-24 (FR2) - I5-25 (FE&B)*1
Tool setting
2.5 V/DIV., 20 ms./DIV.
Condition
Ignition switch ON, fuel level full → low (fuel level warning light on)
HINT:
(A) varies depending on the fuel level.
- Fuel level full: 4.2 to 4.6 V
- Fuel level low (fuel level warning light on): 0.3 to 0.7 V
READ NEXT:
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Meter / Gauge System
DTC No. Detection Item
Link B132187
Lost Communication with EMV Missing Message
B150013 Fuel Sender Circuit
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE
1. INSPECT SPEEDOMETER
NOTICE:
The combination meter assembly receives the vehicle speed signal from the skid control ECU (brake actuator assembly) via CAN comm
SEE MORE:
Steering Heater Switch
Removal
REMOVAL
CAUTION / NOTICE / HINT
COMPONENTS (REMOVAL)
Procedure
Part Name Code
1
SWITCH BASE
55449D
-
-
-
2
STEERING HEATER SWITCH
VEHICLE CONTROL HISTORY (RoB)
VEHICLE CONTROL HISTORY (RoB)
DESCRIPTION
Vehicle Control History is a function that captures and stores ECU data
when triggered by specific vehicle behavior.
It may be possible to determine the cause of the malfunction by checking
the vehicle history information and freeze frame data.
