Cranking Holding Function Circuit: Procedure

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

OK → CHECK FOR INTERMITTENT PROBLEMS 

NG: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
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 engine switch is turned on (IG) and when the engine is started.

   Standard

   Display (STARTER SIG)	Condition
   OFF	Engine switch on (IG)
   ON	Engine start

OK → See step   7 

NG: Go to next step 

1. Disconnect the A10 ECM Connector.
   Fig 1: Identifying A10 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage between the specified terminal of the ECM connector and body ground while cranking the engine.

   Standard voltage

   Tester Connection	Specified Condition
   STSW (A10-14) - Body ground	9 to 14 V

3. 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. Measure the voltage between the specified terminal of the engine room R/B and body ground while cranking the engine.

   Standard voltage

   Tester Connection	Specified Condition
   ST CUT relay (3) - Body ground	9 to 14 V

3. 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

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

   Standard resistance

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (when battery voltage is 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 Park/Neutral Position Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the B36 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 - 5	Below 1 Ω
      N	4 - 5	Below 1 Ω

   3. Reconnect the PNP switch connector.

NG → See step   12 

OK → CHECK HARNESS AND CONNECTOR 

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

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

   Standard resistance

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

3. Reinstall the ST relay.

NG → REPLACE STARTER RELAY 

OK: Go to next step 

1. Disconnect the B36 park/neutral position switch connector.
   Fig 6: Identifying Park/Neutral Position Switch Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the ST relay from the engine room R/B.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   B36-9 - ST relay terminal (1)	Below 1 Ω

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   B36-9 or ST relay terminal (1) - Body ground	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: Checking Harness And Connector (ST Relay - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage between the specified terminal of the engine room R/B and body ground.

   Standard voltage

   Tester Connection	Specified Condition
   ST relay (5) - Body ground	9 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → REPAIR OR REPLACE STARTER ASSEMBLY 

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

1. Disconnect the E58 main body ECU connector.
   Fig 8: Identifying Main Body ECU & ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A10 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   STSW (E58-4) - STSW (A10-14)	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   STSW (E58-4) or STSW (A10-14) - Body ground	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 ACCESS SYSTEM