Cranking Holding Function Circuit: Procedure

1. When starting the engine, check whether the starter motor starts.

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   12 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Select the following menu items: Powertrain / Engine / Data List / Starter Signal. Read the values.
5. Check the result when the ignition switch is turned ON and when the engine is started.

   Standard

   Display (STARTER SIG)	Ignition Switch Position
   OFF	ON
   ON	START

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   7 

A: Go to next step 

1. Disconnect the ECM Connector.
   Fig 1: Identifying A55 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to ON.
3. Measure the voltage between the terminals of the ECM connector and body ground while cranking the engine.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   A55-14 (STSW) - Body ground	Ignition switch ON	11 to 14 V

4. Reconnect the ECM connector.

NG → See step   11 

OK: Go to next step 

1. Remove the ST CUT relay from the engine room R/B.
   Fig 2: Identifying Engine Room Relay Block & ST CUT Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to ON.
3. Measure the voltage between the terminals of the engine room R/B and body ground while cranking the engine.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   ST CUT relay (3) - Body ground	Ignition switch ON	11 to 14 V

4. Reinstall the ST CUT relay.

NG → See step   8 

OK: Go to next step 

1. Remove the ST CUT relay from the engine room R/B.
   Fig 3: Identifying Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance between the terminals.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Always	10 kΩ or higher
   3 - 5	Always	Below 1 Ω (when battery voltage applied to terminals 1 and 2)

3. Reinstall the ST CUT relay.

NG → REPLACE ST CUT RELAY 

OK: Go to next step 

1. Inspect the Park/Neutral Position (PNP) switch.
   Fig 4: Identifying C1 Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the PNP switch connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Gear Selector Lever Position	Tester Connection	Specified Condition
      P	4 - 9	Below 1 Ω
      N	4 - 9	Below 1 Ω

   3. Reconnect the PNP switch connector.

NG → See step   13 

OK → CHECK HARNESS AND CONNECTOR 

1. Remove the ST relay from the engine room R/B.
   Fig 5: Identifying Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance between the terminals.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Always	10 kΩ or higher
   3 - 5	Always	Below 1 Ω (when battery voltage applied between terminals 1 and 2)

3. Reinstall the ST relay.

NG → REPLACE STARTER RELAY 

OK: Go to next step 

1. Disconnect the park/neutral position switch connector.
   Fig 6: Checking Harness And Connector (Park/Neutral Position Switch - Starter Relay)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the ST relay from the engine room R/B.
3. Measure the resistance between the terminals.

   Standard resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   C1-9 - ST relay terminal (1)	Always	Below 1 Ω

   Standard resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   C1-9 or ST relay terminal (1) - Body ground	Always	10 kΩ or higher

4. Reinstall the ST relay.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the ST relay from the engine room R/B.
   Fig 7: Identifying ST Relay Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to ON.
3. Measure the voltage between the terminals of the engine room R/B and body ground.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   ST relay (5) - Body ground	Ignition switch ON	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect the starter assembly. Refer to INSPECTION .

NG → REPAIR OR REPLACE STARTER ASSEMBLY 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - STARTER, STARTER - BATTERY) 

1. Disconnect the main body ECU connector.
   Fig 8: Checking Harness And Connector (Main Body ECU - ECM)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the ECM connector.
3. Measure the resistance between the terminals.

   Standard resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   E9-4 (STSW) - A55-14 (STSW)	Always	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   E9-4 (STSW) or A55-14 (STSW) - Body ground	Always	10 kΩ or higher

4. Reconnect the main body ECU connector.
5. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → GO TO SMART KEY SYSTEM