DESCRIPTION
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CAUTION / NOTICE / HINT
PRECAUTIONS WHEN THE ENGINE STOP AND START ECU AND THE STARTER ASSEMBLY ARE REPLACED
NOTICE:
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PRECAUTIONS WHEN BATTERY IS DISCHARGED AFTER LEAVING VEHICLE FOR A LONG TIME
HINT:
If the vehicle has not been used for a long time, the battery charge may be low and stop and start control operation may be prohibited. After recharging the battery until the charging current decreases to 5 A or below, if the integrated current value still does not increase to the threshold value*1 or above, initialize the integrated current value*2 and drive the vehicle approximately 5 to 40 minutes until stop and start control operates.
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PRECAUTIONS WHEN CONNECTING/DISCONNECTING CABLE TO/FROM NEGATIVE BATTERY TERMINAL
HINT:
IF THE ENGINE FAILS TO RESTART FROM IDLING STOP
NOTICE:
If the engine fails to restart when stopped by stop and start control, the brake actuator may be activated. Brake actuator activation conditions:HINT:
PRECAUTIONS FOR FOUR-WHEEL TOWING
Do not tow the vehicle with all 4 wheels on the ground.
NOTICE:
HINT:
If it is absolutely necessary to tow the vehicle with all 4 wheels on the ground, before towing first turn the ignition switch off. Then, turn the ignition switch to ON without starting the engine, and tow the vehicle.
PRECAUTIONS WHEN REPLACING ECM
NOTICE:
When the ECM is replaced on a vehicle with a non-specified battery, it is necessary to perform battery type switching.
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PROCEDURE
1. | CHECK VEHICLE CONTROL HISTORY (Engine Stall History during Stop&Start (Hood Open)) |
Tester Display |
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Vehicle Control History (RoB) |
(a) Check vehicle control history.
HINT:
Result | Proceed to |
---|---|
Vehicle control history item "Engine Stall History during Stop&Start (Hood Open)" stored | A |
Vehicle control history item "Engine Stall History during Stop&Start (Hood Open)" not stored | B |
B | GO TO STEP 3 |
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2. | CHECK VEHICLE CONDITION (ENGINE HOOD CONDITION) |
(a) Check the condition of the engine hood.
Check with the driver to confirm whether or not the engine hood was opened during stop and start control.
Result | Proceed to |
---|---|
Engine hood was not opened during stop and start control | A |
Engine hood was opened during stop and start control | B |
A | GO TO ENGINE HOOD COURTESY SWITCH CIRCUIT |
B | ENGINE STALL DUE TO ENGINE HOOD BEING OPENED DURING STOP AND START CONTROL EXPLAIN THAT ENGINE RESTART BECOMES PROHIBITED |
3. | CHECK VEHICLE CONTROL HISTORY (ENGINE STALL HISTORY DURING STOP&START (COLLISION OR BATTERY VOLTAGE LOW)) |
Tester Display |
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Vehicle Control History (RoB) |
(a) Check vehicle control history.
HINT:
Result | Proceed to |
---|---|
Vehicle control history item "Engine Stall History during Stop&Start (Collision or Battery Voltage Low)" stored | A |
Vehicle control history item "Engine Stall History during Stop&Start (Collision or Battery Voltage Low)" not stored | B |
A | ENGINE STALL DUE TO POWER SOURCE MOMENTARY INTERRUPTION |
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4. | CHECK VEHICLE CONDITION (DRIVER OPERATION ITEMS) |
Tester Display |
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Vehicle Control History (RoB) |
(a) Select the vehicle control history item "Engine Start Fail" to display the data from the time of control.
(b) Check the output data, and check whether operations were performed that could result in an MT engine stall.
Result | Proceed to |
---|---|
When failure to restart from Stop and Start occurred, check whether the vehicle was put into "Shift Position" and "Clutch Lower Switch" was released (= incorrect operation). Or, for all recorded points, "Neutral Switch" is "OFF" (= driving range) | A |
None of the above conditions are met | B |
A | ENGINE STALL DUE TO INCORRECT CLUTCH OPERATION |
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5. | CHECK DTC OUTPUT |
(a) Following the instructions on the GTS screen, check for SFI system DTCs.
Result | Proceed to | |
---|---|---|
"SFI system poor startability DTCs/RoBs not output", but "SFI system poor startability related/connected DTCs/RoBs are output". HINT:
| A | |
None of the above conditions are met |
| B |
| C | |
| D |
A | GO TO SFI SYSTEM (RoB CHART) |
B | GO TO THEFT DETERRENT/SMART ENTRY (START FUNCTION) (ENGINE DOES NOT START) |
C | INSPECT STARTER SYSTEM |
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6. | STOP AND START SYSTEM OPERATION CHECK |
(a) Perform an operation check of the stop and start system to confirm what kind of operations result in the engine failing to restart after it has been stopped by the stop and start system.
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Result | Proceed to |
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While vehicle is stopped with the engine stopped by idling stop, the engine cannot restart when attempting to drive forward. | A |
During idling stop, an operation that should restart the engine (brake off, shift operation, etc.) is performed, but there is no response to the start request (refer to Data List). | B |
B | IDENTIFY START REQUEST LOCATION |
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7. | CHECK VEHICLE (FAILURE TO RESTART FROM STOP AND START) |
Tester Display |
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Vehicle Control History (RoB) |
(a) Check the vehicle control history.
HINT:
Result | Proceed to |
---|---|
"Failure To Restart From Stop And Start" exists in Vehicle Control History | A |
"Failure To Restart From Stop And Start" does not exist in Vehicle Control History | B |
A | GO TO SFI SYSTEM (RoB CHART) |
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8. | CHECK VEHICLE CONTROL HISTORY AND PROBLEM SYMPTOMS |
Tester Display |
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Vehicle Control History (RoB) |
(a) Select the vehicle control history item "Failure to Restart from Stop and Start" to display the data from the time of control.
(b) Check the output data.
Result | Proceed to |
---|---|
All recorded sections "Starter Status"*1 = OFF, and all recorded sections "Engine Speed" = 0 rpm HINT: It is possible that the starter drive command is not being sent from the engine stop and start ECU. | A |
"Starter Status"*1 = ON for any sections, and all recorded sections "Engine Speed" = 0 rpm HINT: It is possible that the drive command is being sent from the engine stop and start ECU but the starter itself is not moving. | B |
"Engine Speed" > 0 rpm for any sections HINT: It is possible that cranking was achieved but the engine stopped. | C |
A | REPLACE ENGINE STOP AND START ECU |
C | GO TO STEP 13 |
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9. | CHECK VEHICLE CONTROL HISTORY AND PROBLEM SYMPTOMS |
Tester Display |
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Vehicle Control History (RoB) |
(a) Check the vehicle control history item "Engine Starting Time".
Result | Proceed to |
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"Cranking Time" is 1.5 seconds or more HINT: It is possible that there is an external malfunction outside of the stop and start ECU (drive circuit). | A |
"Cranking Time" is less than 1.5 seconds HINT: It is possible that there is a malfunction in the stop and start ECU (drive circuit). | B |
B | REPLACE ENGINE STOP AND START ECU |
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10. | CHECK ENGINE STOP AND START ECU (+B VOLTAGE) |
(a) Disconnect the A67 engine stop and start ECU connector.
(b) Turn the ignition switch to ON.
(c) Turn off any electrical loads.
(d) Measure the resistance according to the value(s) in the table below.
OK:
11 V or higher
Standard Voltage:
Tester Connection | Switch Condition | Specified Condition |
---|---|---|
A67-1 (+B) - Body ground | Ignition switch ON | 11 V or higher |
NG | GO TO STEP 12 |
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11. | CHECK VEHICLE CONTROL HISTORY (BATTERY VOLTAGE) |
Tester Display |
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Vehicle Control History (RoB) |
(a) Check the voltage of the auxiliary battery.
HINT:
Result | Proceed to |
---|---|
Auxiliary battery voltage is 8.92 V or more | A |
Auxiliary battery voltage is less than 8.92 V | B |
A | INSPECT STARTER SYSTEM |
B | GO TO STEP 12 |
12. | INSPECT AUXILIARY BATTERY |
(a) Measure the voltage of the auxiliary battery.
Standard Voltage:
11 to 14 V
OK | INSPECT STARTER SYSTEM |
NG | REPLACE AUXILIARY BATTERY |
13. | CHECK VEHICLE CONTROL HISTORY (CRANKING TIME AND STARTER OFF PERMISSION HISTORY (ECM)) |
Tester Display |
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Vehicle Control History (RoB) |
(a) Select a vehicle control history item to display the "Cranking Time" and "Starter OFF Permission History (ECM)" data from the time of control.
(b) Check the output data.
Result | Proceed to | |
---|---|---|
"Cranking Time" is less than 1.5 seconds | "Starter OFF Permission History (ECM)" is ON HINT: It is possible that the ECM made a judgment of complete combustion and the ECM then stopped the starter. | A |
"Starter OFF Permission History (ECM)" is OFF HINT: It is possible that the engine stop and start ECU made a judgment of complete combustion and the engine stop and start ECU then stopped the starter. | B | |
"Cranking Time" is 1.5 seconds or more HINT: It is possible that the stop and start ECU did not stop the starter. | - | C |
A | SFI SYSTEM (Poor Startability) |
C | GO TO STEP 17 |
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14. | READ VALUE USING GTS (Engine Speed) |
Tester Display |
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Engine Speed |
(a) Using the Data List, check the current engine speed value of the stop and start ECU.
OK:
Stop and Start ECU "Engine Speed" > "Engine Speed (ENG)" + 300 rpm
NG | GO TO STEP 16 |
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15. | CHECK DATA POINTS (Engine Speed) |
(a) Check the RoB data points.
OK:
For each and all of the data points, "Engine Speed" > "Engine Speed (ECM)" + 300 rpm
OK | READ VALUE USING GTS (Engine Speed) |
NG | GO TO STEP 16 |
16. | CHECK ENGINE STOP AND START ECU (STA SIGNAL) |
*a | Component with harness connected (Engine Stop and Start ECU) | - | - |
Tester Display |
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Starter Motor Drive Magnet Switch(Hood Close) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tandem Starter Tester Connection | Condition | Specified Condition |
---|---|---|
A67-21 (STA) - A67-6 (DGND) | Performing Active Test, while cranking. | 6 to 14 V |
(b) Using an oscilloscope, measure the waveform immediately after starting.
OK: Voltage and waveform both normal | |
OK | INSPECT ENGINE (Pre-ignition, SFI System, Poor Startability) |
NG | REPLACE ENGINE STOP AND START ECU |
17. | CHECK DATA POINTS (Engine Speed) |
(a) Check the RoB data points.
OK:
When "Starter Status"*1 is ON, there is even 1 point at which "Engine Speed" < 300 rpm
* "Starter Status" in the case of other than tandem starter, "Starter Motor Status" in the case of tandem starter.
OK | INSPECT STARTER SYSTEM |
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18. | CHECK OPERATION |
(a) Check how long it took the engine to stall after turning the starter off.
Result | Proceed to |
---|---|
After starter turned off, engine immediately stalls. HINT: Engine stalls within 2 seconds. | A |
After starter turned off, engine stalls after a time. | B |
A | SFI SYSTEM (Engine Difficult to Start) |
B | SFI SYSTEM (Engine stalls) |
WARNING
When removing the fuel-filler cap, loosen the cap slightly and wait for any hissing to stop, then remove it
Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness if ingested. Fuel spray is released when there is pressure in the fuel tank and the fuel-filler cap is removed too quickly.