DESCRIPTION
When the key is in the vehicle and the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. In addition, when the shift lever is in P or N and the brake pedal is depressed, the engine can be started by pressing the engine switch.
HINT:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
Problem Symptom |
Data List Item |
Active Test Item |
---|---|---|
Engine does not start |
Power Source Control
Smart Key
Starting Control
|
- |
HINT:
If the brake pedal is repeatedly depressed while the engine is stopped, the brake booster pressure is released and the force required to depress the brake pedal to illuminate the stop lights increases.
PROCEDURE
1. |
CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY |
(a) Press a switch of the electrical key transmitter sub-assembly.
OK:
The electrical key transmitter sub-assembly LED illuminates.
NG |
GO TO STEP 11 |
|
2. |
READ VALUE USING TECHSTREAM (KEY LOW BATTERY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Data List.
(e) Read the Data List according to the display on the Techstream.
Smart Key
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Key Low Battery |
Transmitter battery depleted/Yes or No |
YES: Transmitter battery depleted NO: Transmitter battery not depleted |
The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. The certification ECU (smart key ECU assembly) displays "YES" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), "YES" may be displayed even if the transmitter battery is new). |
Result |
Proceed to |
---|---|
"NO" is displayed on the Techstream screen |
A |
"YES" is displayed on the Techstream screen |
B |
B |
REPLACE TRANSMITTER BATTERY |
|
3. |
CHECK WAVE ENVIRONMENT |
(a) If the problem occurs in certain locations or times of day, the possibility of wave interference is high.
HINT:
Whether the problem is due to wave interference can be checked by holding the electrical key transmitter sub-assembly near the electrical key and TPMS receiver assembly.
OK:
Engine starts.
Result
Result |
Proceed to |
---|---|
NG |
A |
OK |
B |
B |
AFFECTED BY WAVE INTERFERENCE |
|
4. |
CHECK ENGINE SWITCH CONDITION |
(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.
(b) Move the shift lever to P.
(c) 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 → on (ACC) → on (IG) → off |
A |
Power source mode does not change to on (ACC) or on (IG) |
B |
Power source mode changes to on (IG) but not to on (ACC) |
C |
Power source mode changes to on (ACC) but not to on (IG) |
D |
B |
GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG AND ACC) |
C |
GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC) |
D |
GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG) |
|
5. |
READ VALUE USING TECHSTREAM (NEUTRAL SW / CLUTCH SW, SHIFT POSITION P OR N) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Power Source Control or Starting Control / Data List.
(e) Read the Data List according to the display on the Techstream.
Power Source Control
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Neutral SW/ Clutch SW |
Shift position (P and N)/ON or OFF |
ON: Shift lever in P or N OFF: Shift lever in any position other than P or N |
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Shift Position P or N |
Park/neutral position switch status/ON or OFF |
ON: Shift lever in P OFF: Shift lever not in P |
When malfunctioning, the engine will not crank. |
OK:
The Techstream display changes correctly in response to the shift position.
NG |
GO TO STEP 23 |
|
6. |
CHECK FOR DTC |
(a) Using the Techstream, check for certification ECU (smart key ECU assembly) DTCs (See page ).
Result
Result |
Proceed to |
---|---|
DTCs are not output |
A |
Smart key system (for Start Function) DTCs are output |
B |
B |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
7. |
READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Power Source Control / Data List.
(e) Read the Data List according to the display on the Techstream.
Power Source Control
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Stop Light Switch1 |
State of brake pedal/ON or OFF |
ON: Brake pedal depressed OFF: Brake pedal released |
|
OK:
The Techstream display changes correctly in response to the brake operation.
NG |
GO TO STEP 21 |
|
8. |
READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Power Source Control / Data List.
(e) Read the Data List according to the display on the Techstream.
Power Source Control
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Starter Request Signal |
Engine start request signal status/ON or OFF |
ON: With the shift lever in P and the brake pedal depressed, the engine switch is pressed and held OFF: After approx. 1 second has elapsed, the engine switch is released |
|
NOTICE:
Check that the key indicator is displayed on the multi-information display in the combination meter assembly, and then press the engine switch.
OK:
The Techstream display changes correctly in response to the engine switch operation.
NG |
GO TO STEP 12 |
|
9. |
CHECK STEERING LOCK |
(a) Check that the steering unlocks when the engine switch is turned on (ACC).
OK:
The steering unlocks.
NG |
GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING) |
|
10. |
CHECK SECURITY INDICATOR LIGHT (IMMOBILISER SYSTEM UNSET) |
(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.
(b) Move the shift lever to P.
(c) 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 on (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 on (ACC).
OK:
The security indicator light changes from blinking to off at the same time that power source mode changes to on (ACC).
OK |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG |
GO TO IMMOBILISER SYSTEM (PROBLEM SYMPTOMS TABLE) |
11. |
INSPECT TRANSMITTER BATTERY |
(a) Inspect the transmitter battery (See page ).
NOTICE:
Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.
OK |
REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY |
NG |
REPLACE TRANSMITTER BATTERY |
12. |
READ VALUE USING TECHSTREAM (STARTER SW) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Starting Control / Data List.
(e) Read the Data List according to the display on the Techstream.
(f) Get into the vehicle while carrying the electrical key transmitter sub-assembly, move the shift lever to P, press the engine switch while depressing the brake pedal and confirm that the Techstream display changes.
Starting Control
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Starter SW |
Starter operation request/ON or OFF |
ON: Starter operation requested OFF: Starter operation not requested |
When malfunctioning, the engine will not crank. |
OK:
The Techstream display changes.
NG |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
13. |
INSPECT ST RELAY (STARTER RELAY ASSEMBLY) |
(a) Inspect the ST relay (starter relay assembly) (See page ).
NG |
REPLACE ST RELAY (STARTER RELAY ASSEMBLY) |
|
14. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - BODY GROUND) |
(a) Disconnect the C27 certification ECU (smart key ECU assembly) connector. |
|
(b) Disconnect the E13 ECM connector.
(c) Move the shift lever to P or N.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C27-10 (STAR) - Body ground |
20°C (68°F) |
107.05 to 116.33 Ω |
C27-12 (STA) - Body ground |
20°C (68°F) |
106.78 to 115.98 Ω |
*a |
Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)) |
NG |
GO TO STEP 17 |
|
15. |
INSPECT STARTER ASSEMBLY |
(a) Remove the starter assembly (See page ).
(b) Inspect the starter assembly (See page ).
NG |
REPLACE STARTER ASSEMBLY |
|
16. |
CHECK HARNESS AND CONNECTOR (BATTERY - STARTER ASSEMBLY AND ST RELAY (STARTER RELAY ASSEMBLY)) |
(a) Disconnect the S5 and S6 starter assembly connectors.
(b) Remove the ST relay (starter relay assembly) from the engine room relay block assembly.
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3 (ST relay (starter relay assembly)) - S6-1 |
Always |
Below 1 Ω |
3 (ST relay (starter relay assembly)) or S6-1 - Body ground |
Always |
10 kΩ or higher |
*a |
Engine Room Relay Block |
*b |
ST Relay (Starter Relay Assembly) Holder |
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
17. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH) |
(a) Disconnect the C27 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the P1 park/neutral position switch connector.
(c) Disconnect the E13 ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C27-10 (STAR) - P1-4 (B) |
Always |
Below 1 Ω |
C27-10 (STAR) or P1-4 (B) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
18. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY (STARTER RELAY ASSEMBLY)) |
(a) Disconnect the P1 park/neutral position switch connector.
(b) Remove the ST relay (starter relay assembly) from the engine room relay block assembly.
(c) Disconnect the E13 ECM connector.
(d) Disconnect the C27 certification ECU (smart key ECU assembly) connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
P1-5 (L) - 1 (ST relay (starter relay assembly)) |
Always |
Below 1 Ω |
P1-5 (L) or 1 (ST relay (starter relay assembly)) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
19. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ST RELAY (STARTER RELAY ASSEMBLY)) |
(a) Disconnect the C27 certification ECU (smart key ECU assembly) connector.
(b) Remove the ST relay (starter relay assembly) from the engine room relay block assembly.
(c) Disconnect the E13 ECM connector.
(d) Disconnect the P1 park/neutral position switch connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C27-12 (STA) - 1 (ST relay (starter relay assembly)) |
Always |
Below 1 Ω |
C27-12 (STA) or 1 (ST relay (starter relay assembly)) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
20. |
CHECK HARNESS AND CONNECTOR (ST RELAY (STARTER RELAY ASSEMBLY - BODY GROUND)) |
(a) Remove the ST relay (starter relay assembly) from the engine room relay block assembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1 (ST relay (starter relay assembly)) - Body ground |
Always |
Below 1 Ω |
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
21. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY) |
(a) Disconnect the C27 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the S10 stop light switch assembly connector.
(c) Disconnect the E13 ECM connector.
(d) Disconnect the S7 transmission floor shift assembly connector.
(e) Disconnect the S1 skid control ECU (brake actuator assembly) connector.
(f) Disconnect the R38 rear combination light assembly LH connector.
(g) Disconnect the R39 rear combination light assembly RH connector.
(h) Disconnect the C15 center stop light assembly connector.
(i) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(j) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C27-2 (STP1) - S10-1 |
Always |
Below 1 Ω |
C27-2 (STP1) or S10-1 - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
22. |
INSPECT STOP LIGHT SWITCH ASSEMBLY |
(a) Inspect the stop light switch assembly (See page ).
OK |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG |
REPLACE STOP LIGHT SWITCH ASSEMBLY |
23. |
INSPECT PARK/NEUTRAL POSITION SWITCH |
(a) Remove the park/neutral position switch.
for AC60E: (See page )
for AC60F: (See page )
(b) Inspect the park/neutral position switch.
for AC60E: (See page )
for AC60F: (See page )
Result
Result |
Proceed to |
---|---|
OK |
A |
NG (for AC60E) |
B |
NG (for AC60F) |
C |
B |
REPLACE PARK/NEUTRAL POSITION SWITCH |
C |
REPLACE PARK/NEUTRAL POSITION SWITCH |
|
24. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH)) |
(a) Disconnect the C27 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the P1 park/neutral position switch connector.
(c) Disconnect the E13 ECM connector.
(d) Remove the ST relay (starter relay assembly) from the engine room relay block assembly.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C27-10 (STAR) - P1-4 (B) |
Always |
Below 1 Ω |
C27-10 (STAR) or P1-4 (B) - Body ground |
Always |
10 kΩ or higher |
OK |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Adjustment
ADJUSTMENT
CAUTION / NOTICE / HINT
CAUTION:
Radiofrequency radiation exposure information:
This equipment complies with FCC radiation exposure limits set forth
for an uncontrolled environment.
This equipment should be kept with minimum distance of 20 cm (7.87 in.)
between the ...
Terminals Of Ecu
TERMINALS OF ECU
FORWARD RECOGNITION CAMERA
NOTICE:
DTCs may be output when connectors are disconnected during inspection.
Therefore, be sure to clear the DTCs using the Techstream once the inspection
has been completed.
Do not apply excessive force to the forward recognition ...
Operation Check
OPERATION CHECK
1. INSPECT INTERIOR LIGHT CONTROL OPERATION
NOTICE:
Perform this inspection with the customize parameters at the default settings.
The interior light control illuminates the lights below.
Engine Switch Illumination*1
Transponder Key Coil (Ignition Key Cylinder Light)* ...