Starter Signal Circuit [12/2021 - ]: Procedure

1. Check if the engine can be cranked.

   Result

   Result	Proceed to
   Engine cannot be cranked	A
   Engine can be cranked	B

Result: 

B 

See step  13

Result: 

A 

See step  2

1. Check the value displayed on the GTS when the ignition switch is turned to ON and START positions.

   Powertrain > Engine > Data List 

   Tester Display
   Starter SW

   OK

   Condition	GTS Display (Starter SW)
   Ignition switch ON	OFF
   Engine started	ON

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  10

Result: 

OK 

See step  3

Refer to ON-VEHICLE INSPECTION [12/2021 - ]

Result

Result: 

NG 

REPLACE ST NO. 1 RELAY 

Result: 

OK 

See step  4

Refer to INSPECTION [12/2021 - ]

Result

Result: 

NG 

REPLACE STARTER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

OK 

See step  5

1. Remove the ST NO. 1 relay from No. 2 engine room relay block and junction block assembly.
2. Disconnect the starter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 (ST NO. 1 relay) - C52-2 (ST)	Always	Below 1 Ω
   3 (ST NO. 1 relay) or C52-2 (ST) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the cable from the positive (+) battery terminal.
3. Disconnect the starter assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Positive (+) battery terminal - C188-1 (B)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the ST NO. 1 relay from No. 2 engine room relay block and junction block assembly
2. 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	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ST NO. 1 RELAY) 

Result: 

OK 

See step  8

1. Remove the ST NO. 1 relay from No. 2 engine room relay block and junction block assembly.
2. 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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Remove the ST NO. 1 relay from the No. 2 engine room relay block and junction block assembly.
2. Disconnect the park/neutral position switch assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2 (ST NO. 1 relay) - C34-5 (L)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Inspect the park/neutral position switch assembly.

   Refer to INSPECTION [12/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

OK 

See step  11

1. Disconnect the park/neutral position switch assembly connector.
2. Remove the ST NO. 1 relay from No. 2 engine room relay block and junction block assembly.
3. Disconnect the ECM connector.
4. Disconnect the certification ECU (smart key ECU assembly) connector.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C34-5 (L) - 2 (ST NO. 1 relay)	Always	Below 1 Ω
   B70-34 (STA) - 2 (ST NO. 1 relay)	Always	Below 1 Ω
   I40-3 (STA), 2 (ST NO. 1 relay), C34-5 (L) or B70-34 (STA) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  12

1. Disconnect the certification ECU (smart key ECU assembly) connector.
2. Disconnect the park/neutral position switch assembly connector.
3. Disconnect the ECM connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I40-10 (STAR) - C34-4 (B)	Always	Below 1 Ω
   I40-10 (STAR) - C37-7 (NSW)	Always	Below 1 Ω
   I40-10 (STAR), C34-4 (B) or C37-7 (NSW) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Check the value displayed on the GTS when the ignition switch is turned to ON and START positions.

   Powertrain > Engine > Data List 

   Tester Display
   Starter SW

   OK

   Condition	GTS Display (Starter SW)
   Ignition switch ON	OFF
   Engine started	ON

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (ST NO. 1 RELAY - ECM)