AUTOMATIC TRANSMISSION SYSTEM (for 1GR-FE), Diagnostic DTC:P0985, P0986

DESCRIPTION

Shifting from 1st to 5th is performed in combination with the ON and OFF operation of the shift solenoid valves SL1, SL2, S1, S2 and SR, which is controlled by the ECM. If an open or short circuit occurs in one of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly. In case of an open or short circuit, the ECM stops sending current to the circuit. For details, refer to the fail-safe chart (Click here).

MONITOR DESCRIPTION

These DTCs indicate an open or short in the shift solenoid valve SR circuit. When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem, illuminates the MIL and stores the DTC. When the shift solenoid valve SR is on, if its resistance is 8 Ω or less, the ECM determines there is a short in the shift solenoid valve SR circuit.

When the shift solenoid valve SR is off, if its resistance is 100 kΩ or higher, the ECM determines there is an open in the shift solenoid valve SR circuit (Click here).

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SR)

   
   
   1. 

      Disconnect the C30 transmission wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 7 (SR) - Body ground 20°C (68°F) 11 to 15 Ω

      Table 1. Text in Illustration

      *a	Component without harness connected (Transmission Wire)

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

   
   
   1. 

      Disconnect the C34 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition C34-31 (SR) - Body ground 20°C (68°F) 11 to 15 Ω

      Table 2. Text in Illustration

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

   
   
   • OKClick here
   • NGClick here
3. Click here

   INSPECT SHIFT SOLENOID VALVE SR

   
   
   1. 

      Remove shift solenoid valve SR.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Shift solenoid valve SR connector terminal - Shift solenoid valve SR body 20°C (68°F) 11 to 15 Ω

   3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK
      Measurement Condition Specified Condition Battery positive (+) → Shift solenoid valve SR connector Battery negative (-) → Shift solenoid valve SR body Valve moves and makes operating noise

      Table 3. Text in Illustration

      *a	Component without harness connected (Shift Solenoid Valve SR)

   
   
   • OKClick here
   • NGClick here
4. Click here

   REPAIR OR REPLACE TRANSMISSION WIREClick here

5. Click here

   REPLACE ECMClick here

6. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

7. Click here

   REPLACE SHIFT SOLENOID VALVE SRClick here