THEFT DETERRENT / KEYLESS ENTRY SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model) Engine does not Start
DESCRIPTION
When the electrical key transmitter sub-assembly is in the cabin and the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Additionally, when the shift position is in P and the brake pedal is depressed, the engine can be started by pressing the engine switch.
| Problem Symptom | Data List and Active Test |
|---|---|
| Engine does not start | Power Source Control
·
Stop Light Switch ·
Shift P Signal ·
Neutral SW/ Clutch SW ·
Starter Relay Driving Request (Starting Control) ·
Starter Relay ·
Power Supply Condition Entry&Start
·
Immobiliser ·
Start Request ·
L Code Check ·
S Code Check |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
·The smart entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
·If the smart entry and start system (for Start Function) has been disabled, enable the system before performing troubleshooting.
·Inspect the fuses of circuits related to this system before performing the following procedure.
·Before replacing the certification ECU (smart key ECU assembly) or an electrical key transmitter sub-assembly, refer to Service Bulletin.
·After completing repairs, confirm that the problem does not recur.
·After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation."
- HINT:
- ·
If the ignition switch is changed from ON to ACC with the shift position in any position other than P, and then the shift position is moved to P and the engine switch is pressed with the brake pedal depressed, the ignition switch will turn off.
·If the brake pedal is repeatedly depressed while the engine is stopped, the brake booster pressure will be released and the force required to depress the brake pedal to illuminate the stop lights will increase.
PROCEDURE
Using an electrical key transmitter sub-assembly which is registered to the vehicle, turn the ignition switch to ON.
Check that the engine can be started 5 seconds after the ignition switch turned to ON.
- OK:
Engine starts normally.
- Result:
Proceed to OK NG
OK
NG
Get into the vehicle while carrying an electrical key transmitter sub-assembly.
Move the shift position to P.
Press the engine switch with the brake pedal released and check that the security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.
- OK:
The security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.
- HINT:
-
The immobiliser function can be determined to be operating correctly if the security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.
- Result:
Proceed to OK NG
OK
NG
Using the GTS, check if LIN communication DTC B278588 and B278987 are output.
- Body Electrical > Entry&Start > Trouble Codes
- 50001 440
- OK:
DTC B278588 and B278987 are not output.
- Result:
Proceed to OK NG
OK
NG
for GTMC Made:
for SFTM Made:
Get into the vehicle while carrying an electrical key transmitter sub-assembly.
Move the shift position to P.
Check that the key indicator display is displayed on the multi-information display in the combination meter assembly, and then press the engine switch and check that the engine cranks.
- Result:
Result Proceed to Engine cranks and initial combustion occurs A Engine cranks but initial combustion does not occur B Engine does not crank C
A
B
for M20C-FKS:
for M20D-FKS:
C
Get into the vehicle while carrying an electrical key transmitter sub-assembly.
Move the shift position to P.
With the brake pedal released, check that pressing the engine switch causes the power source mode to change.
- Result:
Result Proceed to Power source mode changes : Off → ACC → ON → off A Power source mode does not change to ACC or ON B Power source mode changes to ON but not to ACC C Power source mode changes to ACC but not to ON D
A
B
C
D
Read the Data List according to the display on the GTS.
- Body Electrical > Power Source Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Stop Light Switch State of brake pedal OFF or ON OFF: Brake pedal released
ON: Brake pedal depressed·Use this item to determine if the stop light switch assembly is malfunctioning.
·The engine cannot be started when this item is OFF.
·If the stop light switch assembly is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.
- Body Electrical > Power Source Control > Data List
-
Tester Display Stop Light Switch - 50003 454 206
- OK:
The GTS display changes correctly in response to the brake pedal operation.
- Result:
Proceed to OK NG
OK
NG
Read the Data List according to the display on the GTS.
- Body Electrical > Power Source Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Shift P Signal Shift position P OFF or ON OFF: Shift lever not in P
ON: Shift lever in P·Use this item to determine if the shift position switch is malfunctioning.
·The engine cannot be started when this item is OFF.
- Body Electrical > Power Source Control > Data List
-
Tester Display Shift P Signal - 50003 454 205
- OK:
The GTS display changes correctly in response to the shift position operation.
- Result:
Proceed to OK NG
OK
NG
Read the Data List according to the display on the GTS.
- Body Electrical > Power Source Control > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note Power Supply Condition Power supply state OFF, ACC ON, IGR ON, IGP ON or Starter ON OFF: Ignition switch off
ACC ON: Ignition switch ACC
IGR ON: Ignition switch ON
IGP ON: Ignition switch ON
Starter ON: Sending engine start request signal-
- Body Electrical > Power Source Control > Data List
-
Tester Display Power Supply Condition - 50003 454 405
- NOTICE:
-
Check that the key indicator display is displayed on the multi-information display in the combination meter assembly, and then press the engine switch.
- OK:
The GTS display changes correctly in response to the engine switch operation.
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A126-3 (STA) - Body ground Shift lever in P/N → Shift lever not in P/N 11 to 14 V → 1.0 V or less
- Result:
Proceed to OK NG
OK
NG
for M20C-FKS:
for M20D-FKS:
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
(ST No. 1 Relay Holder) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition ST No. 1 relay terminal 2 - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1.0 V or less
- HINT:
-
*: While the engine is cranking, the auxiliary battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
(ST No. 1 Relay Holder) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition ST relay terminal 1 - Body ground Always Below 1 Ω
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition ST relay terminal 5 - Body ground Always 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the C75 and C76 starter assembly connectors.
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 - C75-1 (ST) Always Below 1 Ω ST No. 1 relay terminal 3 - C76-1 (ZYV) Always Below 1 Ω ST No. 1 relay terminal 3 or C75-1 (ST) - Other terminals and body ground Always 10 kΩ or higher ST No. 1 relay terminal 3 or C76-1 (ZYV) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Disconnect the D1 starter assembly connector.
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 11 to 14 V
- Result:
Proceed to OK NG
OK
for M20C-FKS:
for M20D-FKS:
NG
Disconnect the A34 engine stop and start ECU connector.
| *a | No. 1 Engine Room Relay Block
(ST No. 1 Relay Installation Terminal) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition ST NO. 1 relay installation terminal 2 - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1 V or less
- HINT:
-
*: While the engine is cranking, the battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A126-10 (STAR) - Body ground Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off) 6 V or higher* → 1.0 V or less
- HINT:
-
*: While the engine is cranking, the auxiliary battery voltage may drop to approximately 6 V.
- Result:
Proceed to OK NG
OK
NG
Disconnect the A126 certification ECU (smart key ECU assembly) connector.
Disconnect the A125*1 or A116*2 ECM connector.
*1: for GTMC Made
*2: for SFTM Made
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for GTMC Made: Tester Connection Condition Specified Condition A126-10 (STAR) - ST No. 1 relay terminal 2 Always Below 1 Ω A126-10 (STAR) or ST No. 1 relay terminal 2 - Other terminals and body ground Always 10 kΩ or higher A126-10 (STAR) - A125-18 (STA) Always Below 1 Ω A126-10 (STAR) or A125-18 (STA) - Other terminals and body ground Always 10 kΩ or higher A126-10 (STAR) - A34-21 (STA) Always Below 1 Ω A126-10 (STAR) or A34-21 (STA) - Other terminals and body ground Always 10 kΩ or higher
for SFTM Made: Tester Connection Condition Specified Condition A126-10 (STAR) - ST No. 1 relay terminal 2 Always Below 1 Ω A126-10 (STAR) or ST No. 1 relay terminal 2 - Other terminals and body ground Always 10 kΩ or higher A126-10 (STAR) - A116-18 (STA) Always Below 1 Ω A126-10 (STAR) or A116-18 (STA) - Other terminals and body ground Always 10 kΩ or higher A126-10 (STAR) - A34-21 (STA) Always Below 1 Ω A126-10 (STAR) or A34-21 (STA) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
for M20C-FKS:
for M20D-FKS:
NG
Disconnect the A126 certification ECU (smart key ECU assembly) connector.
Disconnect the A125*1 or A116*2 ECM connector.
*1: for GTMC Made
*2: for SFTM Made
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for GTMC Made: Tester Connection Condition Specified Condition A126-3 (STA) - A125-81 (PPOS) Always Below 1 Ω A126-3 (STA) or A125-81 (PPOS) - Other terminals and body ground Always 10 kΩ or higher
for SFTM Made: Tester Connection Condition Specified Condition A126-3 (STA) - A116-81 (PPOS) Always Below 1 Ω A126-3 (STA) or A116-81 (PPOS) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
for M20C-FKS:
for M20D-FKS:
NG
Get into the vehicle while carrying an electrical key transmitter sub-assembly.
Move the shift position to P.
Press the engine switch with the brake pedal released and check that the security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.
- OK:
The security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.
- HINT:
-
The immobiliser function can be determined to be operating correctly if the security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition G170-14 (P) - Body ground Shift lever in P → Shift lever not in P 9 V or higher → 2.76 V or less
- Result:
Proceed to OK NG
OK
NG
Disconnect the G170 certification ECU (smart key ECU assembly) connector.
Disconnect the G26 shift lock control unit assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for GTMC Made: Tester Connection Condition Specified Condition G170-14 (P) - G26-1 (P2) Always Below 1 Ω G170-14 (P) or G26-1 (P2) - Other terminals and body ground Always 10 kΩ or higher
for SFTM Made: Tester Connection Condition Specified Condition G170-14 (P) - G26-3 (P2) Always Below 1 Ω G170-14 (P) or G26-3 (P2) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
for K121: Click hereDrivetrain>K121 (CVT)>SHIFT LEVER>DISASSEMBLY202304,999999,_52,_138176,_0579406,RM1000000029ENP,
for K121F: Click hereDrivetrain>K121F (CVT)>SHIFT LEVER>DISASSEMBLY202304,999999,_52,_138817,_0584990,RM1000000029ILM,
NG
| *a | Component with harness connected
(Stop Light Switch Assembly) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A40-7 (B) - Body ground Ignition switch off 11 to 14 V
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A40-2 (GND) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG
Disconnect the A126 certification ECU (smart key ECU assembly) connector.
Disconnect the A125*1 or A116*2 ECM connector.
*1: for GTMC Made
*2: for SFTM Made
Disconnect the A39 skid control ECU (brake actuator assembly) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A126-21 (STP1) - A40-3 (L) Always Below 1 Ω A126-21 (STP1) or A40-3 (L) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG