AUTOMATIC TRANSMISSION SYSTEM Transmission Control Switch Circuit

DESCRIPTION

When moving the shift lever into the M position using the transmission control switch, it is possible to switch the shift range position between "1" (first range) and "6" (sixth range).

Shifting up "+" once raises one shift range position, and shifting down "-" lowers one shift range position.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)

   
   
   1. 

      Text in Illustration

      *A	for LHD
      *B	for RHD
      *1	Component without harness connected (Transmission Control Switch)

      Disconnect the transmission control switch connector.

   2. Measure resistance between each terminal of transmission control switch when the shift lever is moved to each position.

      Standard resistance
      for LHD Tester Connection Shift Position Specified Condition 4 - 5 M, "+" and "-" Below 1 Ω ↑ Except M, "+" and "-" 10 kΩ or higher 3 - 2 Press continuously "+" (Up shift) Below 1 Ω ↑ M 10 kΩ or higher 1 - 2 Press continuously "-" (Down shift) Below 1 Ω ↑ M 10 kΩ or higher
      for RHD Tester Connection Shift Position Specified Condition 4 - 5 M, "+" and "-" Below 1 Ω ↑ Except M, "+" and "-" 10 kΩ or higher 1 - 2 Press continuously "+" (Up shift) Below 1 Ω ↑ M 10 kΩ or higher 3 - 2 Press continuously "-" (Down shift) Below 1 Ω ↑ M 10 kΩ or higher

   
   

   NG

   REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY) Click here

   OK

2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - RH ECU-IG FUSE, BODY GROUND)

   

   Text in Illustration

   *A	for LHD
   *B	for RHD
   *1	Front view of wire harness connector (to Transmission Control Switch)

   
   

   1. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      for LHD Tester Connection Switch Condition Specified Condition N50-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V ↑ Engine switch off Below 1 V
      for RHD Tester Connection Switch Condition Specified Condition T11-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V ↑ Engine switch off Below 1 V

   2. Turn the engine switch off position.

   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      for LHD Tester Connection Specified Condition N50-2 (E) - Body ground Below 1 Ω
      for RHD Tester Connection Specified Condition T11-2 (E) - Body ground Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

   
   
   1. 

      Text in Illustration

      *1	Rear view of wire harness connector (to ECM)

      Connect the transmission control switch connector.

   2. Disconnect the ECM connector.

   3. Turn the engine switch on (IG) position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

      Standard voltage
      Tester Connection Shift Position Specified Condition A21-16 (S) - Body ground M, "+" and "-" 11 to 14 V ↑ Except M, "+" and "-" Below 1 V

   4. Turn the engine switch off position.

   5. Disconnect the spiral cable connector.

   6. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard resistance
      Tester Connection Shift Position Specified Condition A21-8 (SFTU) - Body ground Press continuously "+" (Up shift) Below 1 Ω ↑ M 10 kΩ or higher A21-7 (SFTD) - Body ground Press continuously "-" (Down shift) Below 1 Ω ↑ M 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here