STOP AND START STOP AND START SYSTEM Starter Signal Circuit
DESCRIPTION
The engine stop and start ECU can activate the ST NO. 1 relay to operate the starter assembly.
WIRING DIAGRAM
Refer to Neutral Position Switch Circuit.
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.
·After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.
·After replacing the engine stop and start ECU or airbag ECU assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.
·Bleed the oil pump with motor assembly (continuously variable transaxle assembly) after removing and installing the continuously variable transaxle assembly or replacing the CVT fluid.
·After replacing the starter assembly, perform initialization of the number of starter operations stored in the engine stop and start ECU.
·When the starter assembly is replaced, "ST NO. 1 relay" must be also replaced.
·Inspect the fuses for circuits related to this system before performing the following procedure.
·After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
·When disconnecting and reconnecting the battery.
- HINT:
-
When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
PROCEDURE
Turn the ignition switch START and check that the engine cranks.
- Result:
Result Proceed to Engine cranks A Engine does not crank B
A
B
Check that the engine hood is closed.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Active Test / Starter(Hood Close).
- Powertrain > Stop and Start > Active Test
-
Tester Display Starter(Hood Close) - 50004 392 42017
Check whether the engine cranks while the Active Test "Starter(Hood Close)" is being performed.
- NOTICE:
-
The Active Test "Starter(Hood Close)" is stopped automatically 3 seconds after the starter assembly begins operating.
- Standard:
Engine cranks
- Result:
Proceed to OK NG
OK
NG
Enter the following menus: Powertrain / Engine / Utility / Vehicle Control History (RoB).
- Powertrain > Engine > Utility
-
Tester Display Vehicle Control History (RoB) - 50005 372 55
Check the vehicle control history (RoB).
- Result:
Result Proceed to Engine control system Vehicle Control History (RoB) is not output A Engine Difficult to Start is output B Result other than Engine Difficult to Start is output C
- HINT:
- ·
If the value of "Cranking Time" is approximately 1.5 seconds, the stop and start control system or starter system may be malfunctioning.
·If the value of "Cranking Time" is small (approximately 0.5 seconds or less: the minimum value varies depending on the model), the engine control system may be malfunctioning.
·The Data List item "Cranking Time" indicates the length of time starter operation is requested by the engine stop and start ECU. If the engine speed exceeds the specified value, the engine stop and start ECU cancels its start request.
A
B
C
for M20C-FKS:
for M20D-FKS:
Enter the following menus: Powertrain / Engine / Utility / Vehicle Control History (RoB).
- Powertrain > Engine > Utility
-
Tester Display Vehicle Control History (RoB) - 50005 372 55
Select Engine Difficult to Start from the Vehicle Control History to display the data from the time of control.
Check the output data.
- HINT:
- ·
Checking the freeze frame data allows the vehicle conditions at the time of detection to be confirmed.
·As Vehicle Control History may be overwritten whenever the trigger conditions are met, make sure to save the Vehicle Control History data before performing any inspections.
- Result:
Result Proceed to Engine speed does not rise to approximately 300 rpm (Starter does not rotate) A Engine speed rises to approximately 300 rpm (Starter rotates) B
A
B
for M20C-FKS:
for M20D-FKS:
Enter the following menus: Powertrain / Stop and Start / Utility / Vehicle Control History (RoB).
- Powertrain > Stop and Start > Utility
-
Tester Display Vehicle Control History (RoB) - 50005 392 55
Select a vehicle control history item to display the data from the time of control.
Check the output data.
- Result:
Tester Display Result Proceed to Engine Stall History during Stop&Start (Collision or Battery Voltage Low) Yes A Engine Stall History during Engine Starting (Collision) Yes Engine Start Fail Yes B Vehicle control history item is not output or No is displayed for the results of all of the freeze frame data above
A
B
Check if the vehicle was in a collision when the engine stalled.
- Result:
Result Proceed to Vehicle was in collision when engine stalled A Vehicle was not in collision when engine stalled B
- HINT:
-
When "Engine Stall History during Stop&Start (Collision or Battery Voltage Low)" or "Engine Stall History during Engine Starting (Collision)" is stored:
-
This may have been stored because the vehicle was in a collision or a collision detection signal was input while stop and start control was operating.
A
B
Disconnect the engine stop and start ECU connector.
Remove the ST NO. 1 relay from the NO. 1 engine room relay block and junction block assembly.
Disconnect the certification ECU (smart key ECU assembly) connector.
Disconnect the park/neutral position switch assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A34-21 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω A34-21 (STA) - Body ground Always 10 kΩ or higher ST NO. 1 relay terminal 2 - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 1 relay from the NO. 1 engine room relay block and junction block assembly
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition ST NO. 1 relay terminal 1 - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 1 relays from the NO. 1 engine room relay block and junction block assembly
| *1 | NO. 1 Engine Room Relay Block and Junction Block Assembly |
| *2 | ST NO. 1 Relay Terminal |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition ST NO. 1 relay terminal 5 - Body ground Always 9.5 to 14 V
- Result:
Proceed to OK NG
OK
NG
| *1 | Starter Assembly |
| *a | D1-1 (B) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition D1-1 (B) - Body ground Always 9.5 to 14 V
- NOTICE:
-
Before performing this step, check that the starter assembly connector C56 is not disconnected or loose.
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 1 relays from the NO. 1 engine room relay block and junction block assembly.
Disconnect the starter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition ST NO. 1 relay terminal 3 - C43-2 (SL1) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Inspect the ST NO. 1 relay.
- Result:
Proceed to OK NG
OK
NG
Inspect the starter assembly.
- Result:
Proceed to OK NG
OK
- HINT:
-
If arriving at this item from the item "Drive command is being sent from the engine stop and start ECU but the starter itself is not moving" of "After Engine Stops due to Stop and Start System, Engine does not Restart" in Stop and Start / Stop and Start System / Problem Symptoms Table, go to SIMULATION METHOD.
NG
| *a | Front view of wire harness connector
(to Engine Stop and Start ECU) |
Disconnect the engine stop and start ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A33-1 (BIN2) - Body ground Always 9.5 to 14 V A33-3 (BIN1) - Body ground Always 9.5 to 14 V
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Engine Stop and Start ECU) |
Disconnect the engine stop and start ECU connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A32-21 (IGR) - Body ground Ignition switch ON 9.5 to 14 V
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Engine Stop and Start ECU) |
- | - |
Disconnect the engine stop and start ECU connectors.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A34-1 (+B) - Body ground Ignition switch ON 9.5 to 14 V A32-18 (IGP) - Body ground Ignition switch ON 9.5 to 14 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the engine stop and start ECU connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A33-2 (GND2) - Body ground Always Below 1 Ω A33-8 (GND1) - Body ground Always Below 1 Ω A34-6 (DGND) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the engine stop and start ECU connector.
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the certification ECU (smart key ECU assembly) connector. (w/ Smart Entry and Start System)
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A34-21 (STA) - 2 (ST NO. 1 relay) Always Below 1 Ω A34-21 (STA) or 2 (ST NO. 1 relay) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Check that the engine hood is closed.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Active Test / Starter(Hood Close).
- Powertrain > Stop and Start > Active Test
-
Tester Display Starter(Hood Close) - 50004 392 42017
Check whether the engine cranks while the Active Test "Starter(Hood Close)" is being performed.
- NOTICE:
-
The Active Test "Starter(Hood Close)" is stopped automatically 3 seconds after the starter assembly begins operating.
- Standard:
Engine cranks
- Result:
Result Proceed to Engine cranks A Engine does not crank B
A
B
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Data List / Neutral Switch.
- Powertrain > Stop and Start > Data List
-
Tester Display Neutral Switch - 50003 392 202
In accordance with the display on the GTS, read the Data List.
- OK:
GTS Display Condition Normal Condition Neutral Switch Shift lever in P or N ON Shift lever not in P or N OFF
- Result:
Result Proceed to NG A OK (w/ Smart Entry and Start System) B OK (w/o Smart Entry and Start System) C
A
B
C
Disconnect the certification ECU (smart key ECU assembly) connector.
Disconnect the engine stop and start ECU connector.
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A126-9 (STAR) - 2 (ST NO. 1 relay) Always Below 1 Ω A126-20 (STA) - A125-81 (PPOS) Always Below 1 Ω A126-9 (STAR) or 2 (ST NO. 1 relay) - Body ground and other terminals Always 10 kΩ or higher A126-20 (STA) or A125-81 (PPOS) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List / Starter Start Judgment Signal.
- Powertrain > Engine > Data List
-
Tester Display Starter Start Judgment Signal - 50003 372 1888
In accordance with the display on the GTS, read the Data List.
- OK:
GTS Display Condition Normal Condition Starter Start Judgment Signal Shift lever in P or N 1 Shift lever not in P or N 0
- Result:
Proceed to OK NG
OK
NG
Inspect the ST NO. 2 relay.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly |
| *2 | ST NO. 1 relay |
| *3 | ST NO. 2 Relay |
Remove the ST NO. 1 relay and ST NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the ignition or starter switch assembly connector.
Disconnect the engine stop and start ECU connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition G28-5 (ST1) - 5 (ST NO. 2 relay) Always Below 1 Ω 3 (ST NO. 2 relay) - 2 (ST NO. 1 relay) Always Below 1 Ω G28-5 (ST1) or 5 (ST NO. 2 relay) - Body ground and other terminals Always 10 kΩ or higher 3 (ST NO. 2 relay) or 2 (ST NO. 1 relay) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Inspect the ignition or starter switch assembly.
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C71-32 (NSR+) - 2 (ST NO. 2 relay) Always Below 1 Ω C71-33 (NSR-) - 1 (ST NO. 2 relay) Always Below 1 Ω C71-32 (NSR+) or 2 (ST NO. 2 relay) - Body ground and other terminals Always 10 kΩ or higher C71-33 (NSR-) or 1 (ST NO. 2 relay) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Engine Stop and Start ECU) |
- | - |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A34-21 (STA) - A34-6 (DGND) Engine start 6 to 14 V
- Result:
Proceed to OK NG
OK
NG
Inspect the ST NO. 1 relay.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly |
| *2 | ST NO. 1 Relay |
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition 5 (ST NO. 1 relay) - Body ground Always 9.5 to 14 V
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the starter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 3 (ST NO. 1 relay) - C43-2 (SL1) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 1 (ST NO. 1 relay) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the engine stop and start ECU connector.
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the certification ECU (smart key ECU assembly) connector. (w/ Smart Entry and Start System)
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A34-21 (STA) - 2 (ST NO. 1 relay) Always Below 1 Ω A34-21 (STA) or 2 (ST NO. 1 relay) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
| *1 | Starter Assembly |
| *a | D1-1 (B) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition D1-1 (B) - Body ground Always 9.5 to 14 V
- NOTICE:
-
Before performing this step, check that the starter assembly connector D1 is not disconnected or loose.
- Result:
Proceed to OK NG
OK
NG
Connect the positive (+) lead of an oscilloscope to the positive (+) battery terminal and the negative (-) lead to the negative (-) battery terminal.
While cranking the engine, count the number of times the waveform drops.
- Standard:
Waveform drops 2 times
- Result:
Number of Times Waveform Dropped Proceed to 0 times A 2 times B
A
B
| *1 | Starter Assembly |
| *a | B Terminal |
| *b | M Terminal |
Disconnect the cable from the negative (-) battery terminal.
Disconnect terminals B and M of the starter inrush current reduction relay.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition B Terminal - M Terminal Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
| *1 | Starter Assembly |
| *a | Inspect Part |
| *b | B Terminal |
| *c | M Terminal |
Disconnect the cable from the negative (-) battery terminal.
Disconnect terminal B of the starter inrush current reduction relay.
Disconnect terminal M of the starter assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition M Terminal - B Terminal Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
| *1 | Starter Assembly |
| *a | Inspect Part |
| *b | M Terminal |
Disconnect the cable from the negative (-) battery terminal.
Disconnect terminal M of the starter inrush current reduction relay.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition M Terminal - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Inspect the starter assembly.
- Result:
Proceed to OK NG
OK
NG