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

DESCRIPTION

The P position switch (transmission shift main switch) indicator light comes on when the P position switch (transmission shift main switch) is pressed (park (P) selected), goes off when a shift state other than park (P) is selected and blinks when a system malfunction occurs. Then an error message is displayed on the multi-information display.

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 A131 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
      Result 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. Reconnect the A131 transmission control ECU assembly connector.

   
   

   B

   REPLACE TRANSMISSION CONTROL ECU ASSEMBLY for LHD: Click here REPLACE TRANSMISSION CONTROL ECU ASSEMBLY for RHD: Click here

   A

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

   
   

   1. Disconnect the A131 transmission control ECU assembly connector.

   2. Disconnect the E109 P position switch (transmission shift main switch) connector.

   3. 

      *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 A131-20 (IND) or E109-7 (IND-) - Body ground and other terminals Power switch off 10 kΩ or higher

   4. Reconnect the E109 P position switch (transmission shift main switch) connector.

   5. Reconnect the A131 transmission control ECU assembly connector.

      Result
      Proceed to OK NG

   
   

   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 E109 P position switch (transmission shift main switch) connector.

   2. 

      *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 E109-6 (IND+) - Body ground Power switch off 9 to 14 V

   3. Reconnect the E109 P position switch (transmission shift main switch) connector.

      Result
      Proceed to OK NG

   
   

   NG

   CHECK AND REPAIR POWER SOURCE CIRCUIT

   OK

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

   
   

   1. Disconnect the E109 P position switch (transmission shift main switch) connector.

   2. 

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

      Apply auxiliary battery voltage between terminals E109-6 (IND+) and E109-7 (IND-) and check the indicator light.

      Result
      Condition Specified Condition Auxiliary battery voltage applied between terminals E109-6 (IND+) and E109-7 (IND-) Comes on

      Tech Tips

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

   3. Reconnect the E109 P position switch (transmission shift main switch) connector.

      Result
      Proceed to OK NG

   
   

   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 A131 transmission control ECU assembly connector.

   2. Disconnect the E109 P position switch (transmission shift main switch) connector.

   3. 

      *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 A131-20 (IND) - E109-7 (IND-) Power switch off Below 1 Ω

   4. Reconnect the E109 P position switch (transmission shift main switch) connector.

   5. Reconnect the A131 transmission control ECU assembly connector.

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE TRANSMISSION CONTROL ECU ASSEMBLY for LHD: Click here REPLACE TRANSMISSION CONTROL ECU ASSEMBLY for RHD: Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR