| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000YSRF |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: Starter Signal Circuit; 2017 - 2020 MY Sienna [08/2016 - ] | ||
|
Starter Signal Circuit |
DESCRIPTION
While the engine is being cranked, current flows from terminal STAR of the certification ECU (smart key ECU assembly) to the park/neutral position switch and to terminal STA of the ECM (STA signal).
WIRING DIAGRAM
Refer to DTC P061512.
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![2017 MY Sienna [08/2016 - 11/2017]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: P061512; Starter Relay Circuit Short to Battery](/t3Portal/stylegraphics/info.gif)
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
-
After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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PROCEDURE
|
1. |
CHECK WHETHER ENGINE CAN BE CRANKED |
(a) Check if the engine can be cranked.
|
Result |
Proceed to |
|---|---|
|
Engine cannot be cranked |
A |
|
Engine can be cranked |
B |
| B |
|
|
|
2. |
READ VALUE USING TECHSTREAM (STARTER SW) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Starter SW.
(e) Check the value displayed on the Techstream when the ignition switch is turned ON and the engine is cranked.
OK:
|
Condition |
Techstream Display (Starter SW) |
|---|---|
|
Ignition switch ON |
OFF |
|
Cranking position |
ON |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (for 2WD) |
B |
|
NG (for AWD) |
C |
| B |
|
| C |
|
|
|
3. |
INSPECT ST RELAY |
(a) Inspect the ST relay.
Click here
| NG |
|
REPLACE RELAY (ST RELAY) |
|
|
4. |
INSPECT STARTER ASSEMBLY |
(a) Inspect the starter assembly.
Click here
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY) |
(a) Remove the ST relay from the engine room relay block.
(b) Disconnect the B6 starter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3 (ST relay holder) - B6-1 |
Always |
Below 1 Ω |
|
3 (ST relay holder) or B6-1 - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK HARNESS AND CONNECTOR (BATTERY - STARTER ASSEMBLY) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the cable from the positive (+) battery terminal.
(c) Disconnect the h2 starter assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Positive (+) battery terminal -h2-1 |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST RELAY) |
|
(a) Remove the ST relay from the engine room relay block. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
5 (ST relay holder) - Body ground |
Ignition switch ON |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND) |
(a) Remove the ST relay from the engine room relay block.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2 (ST relay holder) - Body ground |
Always |
Below 1 Ω |
|
Result |
Proceed to |
|---|---|
|
OK (w/ Smart Key system) |
A |
|
OK (w/o Smart Key system) |
B |
|
NG |
C |
| B |
|
| C |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
9. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ST RELAY) |
(a) Remove the ST relay from the engine room relay block.
(b) Disconnect the B66 park/neutral position switch connector.
(c) Disconnect the A35 power management control ECU connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B66-9 (L) - 2 (ST relay holder) |
Always |
Below 1 Ω |
|
A35-2 (STA) - 2 (ST relay holder) |
Always |
Below 1 Ω |
|
B66-9 (L), A35-2 (STA) or 2 (ST relay holder) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
10. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY) |
(a) Remove the ST relay from the engine room relay block.
(b) Disconnect the B66 park/neutral position switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B66-9 (L) - 2 (ST relay holder) |
Always |
Below 1 Ω |
|
B66-9 (L), or 2 (ST relay holder) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
| NG |
|
REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
11. |
INSPECT PARK/NEUTRAL POSITION SWITCH |
(a) Inspect the park/neutral position switch.
Click here
|
Result |
Proceed to |
|---|---|
|
OK (w/ Smart Key system) |
A |
|
OK (w/o Smart Key system) |
B |
|
NG |
C |
| B |
|
| C |
|
|
|
12. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH - ECM) |
(a) Disconnect the B66 park/neutral position switch connector.
(b) Disconnect the A35 Power management control ECU connector.
(c) Disconnect the B67 ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A35-3 (STAR) - B66-4 (B) |
Always |
Below 1 Ω |
|
A35-3 (STAR) - B67-106 (NSW) |
Always |
Below 1 Ω |
|
A35-3 (STAR), B66-4 (B) or B67-106 (NSW) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
13. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM - ST RELAY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Disconnect the B66 park/neutral position switch connector.
(b) Disconnect the A69 ECM connector.
(c) Remove the ST relay from the engine room relay block.
(d) Disconnect the A35 power management control ECU connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B66-9 (L) - A69-43 (STA) |
Always |
Below 1 Ω |
|
B66-9 (L), A69-43 (STA), 2 (ST relay holder) or A35-2 (STA) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
14. |
INSPECT IGNITION OR STARTER SWITCH ASSEMBLY |
(a) Inspect the ignition or starter switch assembly.
Click here
| NG |
|
|
|
15. |
CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH - ECM) |
(a) Disconnect the D27 ignition or starter switch assembly connector.
(b) Disconnect the B66 park/neutral position switch connector.
(c) Disconnect the B67 ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D27-8 (ST2) - B66-4 (B) |
Always |
Below 1 Ω |
|
D27-8 (ST2) - B67-106 (NSW) |
Always |
Below 1 Ω |
|
D27-8 (ST2), B66-4 (B) or B67-106 (NSW) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
16. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY - ECM) |
(a) Disconnect the B66 park/neutral position switch connector.
(b) Disconnect the A69 ECM connector.
(c) Remove the ST relay from the engine room relay block.
(d) Measure the resistance according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B66-9 (L) - A69-43 (STA) |
Always |
Below 1 Ω |
|
B66-9 (L), A69-43 (STA) or 2 (ST relay holder) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
17. |
INSPECT PARK/NEUTRAL POSITION SWITCH |
(a) Inspect the park/neutral position switch.
Click here
|
Result |
Proceed to |
|---|---|
|
OK (w/ Smart Key system) |
A |
|
OK (w/o Smart Key system) |
B |
|
NG |
C |
| B |
|
| C |
|
|
|
18. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH - ECM) |
(a) Disconnect the B66 park/neutral position switch connector.
(b) Disconnect the A35 Power management control ECU connector.
(c) Disconnect the B67 ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A35-3 (STAR) - B66-4 (B) |
Always |
Below 1 Ω |
|
A35-3 (STAR) - B67-106 (NSW) |
Always |
Below 1 Ω |
|
A35-3 (STAR), B66-4 (B) or B67-106 (NSW) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
19. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM - ST RELAY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Disconnect the B66 park/neutral position switch connector.
(b) Disconnect the A69 ECM connector.
(c) Remove the ST relay from the engine room relay block.
(d) Disconnect the A35 power management control ECU connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B66-9 (L) - A69-43 (STA) |
Always |
Below 1 Ω |
|
B66-9 (L), A69-43 (STA), 2 (ST relay holder) or A35-2 (STA) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
20. |
INSPECT IGNITION OR STARTER SWITCH ASSEMBLY |
(a) Inspect the ignition or starter switch assembly.
Click here
| NG |
|
|
|
21. |
CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH - ECM) |
(a) Disconnect the D27 ignition or starter switch assembly connector.
(b) Disconnect the B66 park/neutral position switch connector.
(c) Disconnect the B67 ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D27-8 (ST2) - B66-4 (B) |
Always |
Below 1 Ω |
|
D27-8 (ST2) - B67-106 (NSW) |
Always |
Below 1 Ω |
|
D27-8 (ST2), B66-4 (B) or B67-106 (NSW) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
22. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY - ECM) |
(a) Disconnect the B66 park/neutral position switch connector.
(b) Disconnect the A69 ECM connector.
(c) Remove the ST relay from the engine room relay block.
(d) Measure the resistance according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B66-9 (L) - A69-43 (STA) |
Always |
Below 1 Ω |
|
B66-9 (L), A69-43 (STA) or 2 (ST relay holder) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
23. |
READ VALUE USING TECHSTREAM (STARTER SW) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Starter SW.
(e) Check the value displayed on the Techstream when the ignition switch is turned ON and the engine is cranked.
OK:
|
Condition |
Techstream Display (Starter SW) |
|---|---|
|
Ignition switch ON |
OFF |
|
Cranking position |
ON |
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - ECM) |
|
|