Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001EEK8
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 10/2019]
Title: STOP AND START: STOP AND START SYSTEM: P085012,P085014; Park/Neutral Switch Circuit Short to Battery; 2019 MY RAV4 [11/2018 - 10/2019]

DTC

P085012

Park/Neutral Switch Circuit Short to Battery

DTC

P085014

Park/Neutral Switch Circuit Short to Ground or Open

DESCRIPTION

The engine stop and start ECU detects malfunctions by comparing the conditions of the shift position signal and NSW signal. If a malfunction is detected, the engine stop and start ECU blinks the stop and start cancel indicator, prohibits stop and start control and stores DTC P085012 or P085014.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

Note

P085012

Park/Neutral Switch Circuit Short to Battery

Both of the following conditions are met for 15 seconds or more (2 trip detection logic):

  • Ignition switch ON.
  • NSW signal is off with the shift lever in P or N.
  • Wire harness or connector
  • Park/Neutral position switch assembly
  • ECM
  • Engine stop and start ECU

Blinks

DTC stored

SAE Code: P0852

P085014

Park/Neutral Switch Circuit Short to Ground or Open

Both of the following conditions are met for 2 seconds or more (2 trip detection logic):

  • Ignition switch ON.
  • NSW signal is on with the shift lever not in P or N.
  • Wire harness or connector
  • Park/Neutral position switch assembly
  • ECM
  • Engine stop and start ECU

Blinks

DTC stored

SAE Code: P0851

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.

    Click here 2019 MY RAV4 [11/2018 - 10/2019]; STOP AND START: STOP AND START SYSTEM: REGISTRATION

  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

    Click here 2019 MY RAV4 [11/2018 - 10/2019]; STOP AND START: STOP AND START SYSTEM: REGISTRATION

  • After replacing the engine stop and start ECU or airbag ECU assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

    Click here 2019 MY RAV4 [11/2018 - 10/2019]; STOP AND START: STOP AND START SYSTEM: REGISTRATION

  • When the engine stop and start ECU or oil pump with solenoid assembly is replaced, check the oil pump with solenoid assembly.

    Click here 2019 MY RAV4 [11/2018 - 10/2019]; STOP AND START: STOP AND START SYSTEM: REGISTRATION

  • When the ECM is replaced on a vehicle with a non-specified battery, it is necessary to perform battery type switching.

    Click here 2019 MY RAV4 [11/2018 - 10/2019]; STOP AND START: STOP AND START SYSTEM: REGISTRATION

  • Perform Registration (VIN registration or frame number registration) when replacing the ECM.

    Click here

    Click here 2019 - 2020 MY RAV4 [11/2018 - 08/2020]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM (w/ Canister Pump Module): REGISTRATION

  • Make sure to perform Reset Memory (A/T initialization), when replacing the automatic transaxle assembly, ECM or engine assembly.

    Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: REGISTRATION

  • Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

  • Using the Techstream, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.

    Click here 2019 - 2021 MY RAV4 [11/2018 - 12/2021]; STOP AND START: STOP AND START SYSTEM: FREEZE FRAME DATA

  • DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.

    Click here 2019 - 2023 MY RAV4 [11/2018 - 10/2023]; STOP AND START: STOP AND START SYSTEM: DTC CHECK / CLEAR

PROCEDURE

1.

READ VALUE USING TECHSTREAM (SHIFT SW STATUS)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Transmission / Data List / Shift SW Status (P, R, N, D Range).

Powertrain > Transmission > Data List

Tester Display

Shift SW Status (P Range)

Shift SW Status (R Range)

Shift SW Status (N Range)

Shift SW Status (D Range)

(e) In accordance with the display on the Techstream, read the Data List.

Powertrain > Transmission > Data List

Tester Display

Measurement Item

Range

Normal Condition

Shift SW Status (P Range)

Park/Neutral position switch assembly status

OFF or ON

OFF: Shift lever not in P

ON: Shift lever in P

Shift SW Status (R Range)

Park/Neutral position switch assembly status

OFF or ON

OFF: Shift lever not in R

ON: Shift lever in R

Shift SW Status (N Range)

Park/Neutral position switch assembly status

OFF or ON

OFF: Shift lever not in N

ON: Shift lever in N

Shift SW Status (D Range)

Park/Neutral position switch assembly status

OFF or ON

OFF: Shift lever not in D or S

ON: Shift lever in D or S

NG

GO TO STEP 5

OK

2.

READ VALUE USING TECHSTREAM (NEUTRAL POSITION SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Transmission / Data List / Neutral Position SW.

Powertrain > Transmission > Data List

Tester Display

Neutral Position SW

(e) In accordance with the display on the Techstream, read the Data List.

Powertrain > Transmission > Data List

Tester Display

Measurement Item

Range

Normal Condition

Neutral Position SW

Park/Neutral position switch assembly status

OFF or ON

OFF: Shift lever not in P or N

ON: Shift lever in P or N

OK

USE SIMULATION METHOD TO CHECK

NG

3.

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Inspect the park/neutral position switch assembly.

Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): PARK / NEUTRAL POSITION SWITCH: INSPECTION

NG

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

OK

4.

CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

(a) Disconnect the engine stop and start ECU connector.

(b) Disconnect the park/neutral position switch assembly connector.

(c) Disconnect the ECM connector.

(d) Disconnect the certification ECU (smart key ECU assembly) connector. (w/ Smart Key System)

(e) Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A34-21 (STA) - C31-9 (L)

Always

Below 1 Ω

A34-17 (CLL) - C31-4 (B)

Always

Below 1 Ω

A34-21 (STA) or C31-9 (L) - Body ground and other terminals

Always

10 kΩ or higher

A34-17 (CLL) or C31-4 (B) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ENGINE STOP AND START ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Inspect the park/neutral position switch assembly.

Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): PARK / NEUTRAL POSITION SWITCH: INSPECTION

NG

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

OK

6.

CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

(a) Disconnect the ECM connector.

(b) Disconnect the park/neutral position switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C41-26 (P) - C31-3 (PL)

Always

Below 1 Ω

C41-25 (R) - C31-2 (RL)

Always

Below 1 Ω

C41-24 (N) - C31-8 (NL)

Always

Below 1 Ω

C41-23 (D) - C31-7 (DL)

Always

Below 1 Ω

A24-23 (NSW) - C31-4 (B)

Always

Below 1 Ω

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR