| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM100000001NMKQ |
| Model Year Start: 2020 | Model: Camry | Prod Date Range: [03/2020 - ] |
| Title: A25A-FKS (ENGINE CONTROL): SFI SYSTEM: Starter Signal Circuit; 2020 - 2024 MY Camry [03/2020 - ] | ||
|
Starter Signal Circuit |
DESCRIPTION
While the engine is being cranked, current flows from terminal ST1 of the ignition switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to the park/neutral position switch assembly and to terminal STA of the ECM (STA signal).
*1: w/o Smart Key System.
*2: w/ Smart Key System.
WIRING DIAGRAM
Refer to DTC P061512.
Click here
![2020 - 2024 MY Camry [03/2020 - ]; A25A-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 procedure.
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.
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Starter SW |
(e) Check the value displayed on the Techstream when the ignition switch is turned to ON and the engine is cranked.
OK:
|
Condition |
Techstream Display (Starter SW) |
|---|---|
|
Ignition switch ON |
OFF |
|
Cranking position |
ON |
| NG |
|
|
|
3. |
INSPECT RELAY (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 |
|
REPLACE STARTER ASSEMBLY
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY) |
(a) Remove the ST relay from the engine room relay block and junction block assembly.
(b) Disconnect the 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) - C61-1 |
Always |
Below 1 Ω |
|
3 (ST relay) or C61-1 - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND) |
(a) Remove the ST relay from the engine room relay block and junction 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) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
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 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 - D1-1 |
Always |
Below 1 Ω |
|
Result |
Proceed to |
|---|---|
|
OK (w/o Smart Key System) |
A |
|
OK (w/ Smart Key System) |
B |
|
NG |
C |
| B |
|
| C |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST RELAY) |
(a) Remove the ST relay from the engine room relay block and junction block assembly.
(b) Disconnect the park/neutral position switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C55-9 (L) - 2 (ST relay) |
Always |
Below 1 Ω |
| OK |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ST RELAY) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY - ST RELAY) |
(a) Remove the ST relay from the engine room relay block and junction block assembly.
(b) Disconnect the certification ECU (smart key ECU assembly) connector.
(c) Disconnect the park/neutral position switch assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C55-9 (L) - 2 (ST relay) |
Always |
Below 1 Ω |
|
A13-20 (STA) - 2 (ST relay) |
Always |
Below 1 Ω |
| OK |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ST RELAY) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
10. |
INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY |
(a) Inspect the park/neutral position switch assembly.
for 2WD models: Click here
for AWD models: Click here
|
Result |
Proceed to |
|---|---|
|
OK (w/o Smart Key System) |
A |
|
OK (w/ Smart Key System) |
B |
|
NG |
C |
| B |
|
| C |
|
REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for 2WD models: Click here
for AWD models: Click here
|
|
|
11. |
INSPECT IGNITION SWITCH ASSEMBLY |
(a) Inspect the ignition switch assembly.
Click here
| NG |
|
|
|
12. |
CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM) |
(a) Disconnect the park/neutral position switch assembly connector.
(b) Disconnect the ignition switch assembly connector.
(c) Disconnect the ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K30-5 (ST1) - C55-4 (B) |
Always |
Below 1 Ω |
|
K30-5 (ST1) - A24-23 (NSW) |
Always |
Below 1 Ω |
|
K30-5 (ST1), C55-4 (B) or A24-23 (NSW) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
13. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST RELAY - ECM) |
(a) Remove the ST relay from the engine room relay block and junction block assembly.
(b) Disconnect the park/neutral position switch assembly connector.
(c) Disconnect the ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2 (ST relay) - C55-9 (L) |
Always |
Below 1 Ω |
|
2 (ST relay), C55-9 (L) or A24-30 (STA) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH ASSEMBLY) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
14. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM - ST RELAY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
(a) Disconnect the park/neutral position switch assembly connector.
(b) Disconnect the ECM connector.
(c) Remove the ST relay from the engine room relay block and junction block assembly.
(d) Disconnect the 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 |
|---|---|---|
|
C55-9 (L) - A24-30 (STA) |
Always |
Below 1 Ω |
|
C55-9 (L), A24-30 (STA), 2 (ST relay) or A13-20 (STA) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
15. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM) |
(a) Disconnect the park/neutral position switch assembly connector.
(b) Disconnect the certification ECU (smart key ECU assembly) connector.
(c) Disconnect the ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A13-9 (STAR) - C55-4 (B) |
Always |
Below 1 Ω |
|
A13-9 (STAR) - A24-23 (NSW) |
Always |
Below 1 Ω |
|
A13-9 (STAR), C55-4 (B) or A24-23 (NSW) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
GO TO SMART KEY SYSTEM
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
16. |
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.
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Starter SW |
(e) Check the value displayed on the Techstream when the ignition switch is turned to 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) |
|
|