ELECTRONIC SHIFT LEVER SYSTEM "P" Position Switch Indicator Light Circuit

DESCRIPTION

The indicator light comes on when the P position switch (transmission shift main switch) is pressed (park (P) selected) and goes off when a shift state other than park (P) is selected or when a system malfunction occurs. In the case of a malfunction, a parking lock system warning message is displayed on the combination meter sub-assembly and the parking lock system warning light comes on.

WIRING DIAGRAM

PROCEDURE

1. CHECK P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH) (INDICATOR LIGHT)

   
   

   1. Turn the power switch on (IG).

   2. Depress the brake pedal and move the shift lever to select neutral (N).

   3. Inspect the indicator light condition by operating the P position switch (transmission shift main switch).

      Result
      Condition of Indicator Light Proceed to Indicator light does not go off. (Remains on) A Indicator light does not come on. B

   4. Turn the power switch off.

   
   

   B

   CHECK HARNESS AND CONNECTOR (P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH) POWER SOURCE CIRCUIT) Click here

   A

2. CHECK P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH) (INDICATOR LIGHT)

   
   

   1. Disconnect the A23 transmission control ECU assembly connector.

   2. Turn the power switch on (IG).

   3. Inspect the indicator light condition by operating the P position switch (transmission shift main switch).

      Result
      Condition of Indicator Light Proceed to Indicator light does not go off. (Remains on) A Indicator light goes off. B

      Note

      Turning the power switch on (IG) with the transmission control ECU assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

   4. Turn the power switch off.

   5. Connect the A23 transmission control ECU assembly connector.

   
   

   B

   REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

   A

3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH))

   
   

   1. Disconnect the A23 transmission control ECU assembly connector.

   2. Disconnect the L124 P position switch (transmission shift main switch) connector.

   3. 

      Text in Illustration

      *a	Front view of wire harness connector (to Transmission Control ECU Assembly)
      *b	Front view of wire harness connector (to P Position Switch (Transmission Shift Main Switch))

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition A23-20 (IND) or L124-7 (IND-) - Body ground and other terminals Power switch off 10 kΩ or higher

   4. Connect the L124 P position switch (transmission shift main switch) connector.

   5. Connect the A23 transmission control ECU assembly connector.

   
   

   OK

   REPLACE P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH)

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

4. CHECK HARNESS AND CONNECTOR (P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH) POWER SOURCE CIRCUIT)

   
   

   1. Disconnect the L124 P position switch (transmission shift main switch) connector.

   2. 

      Text in Illustration

      *a	Front view of wire harness connector (to P Position Switch (Transmission Shift Main Switch))

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

      Standard Voltage
      Tester Connection Condition Specified Condition L124-6 (IND+) - Body ground Power switch off 9 to 14 V

   3. Connect the L124 P position switch (transmission shift main switch) connector.

   
   

   NG

   CHECK AND REPAIR POWER SOURCE CIRCUIT

   OK

5. INSPECT P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH)

   
   

   1. Disconnect the L124 P position switch (transmission shift main switch) connector.

   2. 

      Text in Illustration

      *a	Component without harness connected (P Position Switch (Transmission Shift Main Switch))

      Apply auxiliary battery voltage between terminals L124-6 (IND+) and L124-7 (IND-) and check the indicator light.

      Result
      Condition Specified Condition Auxiliary battery voltage applied between terminals L124-6 (IND+) and L124-7 (IND-) Comes on

      Tech Tips

      Terminals No. 1 and No. 8 on the component side connector are empty.

   3. Connect the L124 P position switch (transmission shift main switch) connector.

   
   

   NG

   REPLACE P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH)

   OK

6. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - P POSITION SWITCH (TRANSMISSION SHIFT MAIN SWITCH))

   
   

   1. Disconnect the A23 transmission control ECU assembly connector.

   2. Disconnect the L124 P position switch (transmission shift main switch) connector.

   3. 

      Text in Illustration

      *a	Front view of wire harness connector (to Transmission Control ECU Assembly)
      *b	Front view of wire harness connector (to P Position Switch (Transmission Shift Main Switch))

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition A23-20 (IND) - L124-7 (IND-) Power switch off Below 1 Ω

   4. Connect the L124 P position switch (transmission shift main switch) connector.

   5. Connect the A23 transmission control ECU assembly connector.

   
   

   OK

   REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR