Toyota Corolla Cross: Park/Neutral Switch Circuit Short to Battery (P085012,P085014)
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 stores DTC P085012 or P085014.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Warning Indicate |
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):
|
| Does not come on |
Does not come on | 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):
|
| Does not come on |
Does not come on | SAE Code: P0851 |
WIRING DIAGRAM
w/ Smart Key System
w/o Smart Key System
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
.gif)
- After replacing the engine stop and start ECU, perform learning of the external backup boost converter (eco run vehicle converter assembly).
Click here
- 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
- When the ECM is replaced on a vehicle with a non-specified auxiliary battery, it is necessary to perform auxiliary battery type switching.
Click here
- When the engine stop and start ECU or oil pump with motor assembly is replaced, check the oil pump with motor assembly.
Click here
- Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
- Using the GTS, 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
- For wire harness and connector inspection procedures and precautions, refer to
- 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.
PROCEDURE
|
1. | READ VALUE USING GTS (SHIFT SW STATUS) |
(a) 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) |
(b) In accordance with the display on the GTS, 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 | .gif) | GO TO STEP 5 |
|
.gif)
| 2. |
READ VALUE USING GTS (NEUTRAL POSITION SW) |
(a) Enter the following menus.
Powertrain > Transmission > Data List|
Tester Display |
|---|
| Neutral Position SW |
(b) In accordance with the display on the GTS, 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 |
|
| 3. |
INSPECT PARK/NEUTRAL POSITION SWITCH |
- for 2WD: Click here
- for AWD: Click here
| NG | | REPLACE PARK/NEUTRAL POSITION SWITCH for 2WD: Click here for AWD: Click here
|
|
| 4. |
CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY) |
(a) Disconnect the A169 engine stop and start ECU connector.
(b) Disconnect the C62 park/neutral position switch assembly connector.
(c) Disconnect the A47 ECM connector.
(d) Disconnect the I223 certification ECU (smart key ECU Assembly) connector.*1
- *1: w/ Smart Key System
(e) Remove the ST relay from the No. 1 engine room relay block.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
A169-21 (STA) - C62-5 (L) |
Always | Below 1 Ω |
|
A169-17 (CLL) - C62-4 (B) |
Always | Below 1 Ω |
|
A169-21 (STA) - Body ground and other terminals |
Always | 10 kΩ or higher |
|
C62-5 (L) - Body ground and other terminals |
Always | 10 kΩ or higher |
|
A169-17 (CLL) - Body ground and other terminals |
Always | 10 kΩ or higher |
|
C62-4 (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 |
for 2WD: Click here
for AWD: Click here
| NG | |
REPLACE PARK/NEUTRAL POSITION SWITCH for 2WD: Click here for AWD: Click here
|
|
| 6. |
CHECK HARNESS AND CONNECTOR (ECM AND TCM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY) |
(a) Disconnect the C80 TCM connector.
(b) Disconnect the A47 ECM connector.
(c) Disconnect the C62 park/neutral position switch assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
C80-29 (P) - C62-6 (PL) |
Always | Below 1 Ω |
|
C80 30 (R) - C62-1 (RL) |
Always | Below 1 Ω |
|
C80-32 (N) - C62-9 (NL) |
Always | Below 1 Ω |
|
C80-31 (D) - C62-7 (DL) |
Always | Below 1 Ω |
|
A47-23 (NSW) - C62-4 (B) |
Always | Below 1 Ω |
| OK | | REPLACE TCM for 2WD: Click here for AWD: Click here
|
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Hydraulic Pressure Unit Component Internal Failure (P094296)
DESCRIPTION Refer to DTC P02CB11. Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
MIL Warning Indicate
Note P094296
Hydraulic Pressure U
Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Ground (P0C2B11)
DESCRIPTION The oil pump of the continuously variable transaxle assembly stops operating when the engine is stopped by stop and start control. While the engine is stopped by stop and start control, th
Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Battery or Open (P0C2B15)
DESCRIPTION Refer to DTC P0C2B11. Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
MIL Warning Indicate
Note P0C2B15
Auxiliary Transmissi
SEE MORE:
Intermediate Shaft Speed Sensor "C" Circuit Short to Battery (P274912,P274914,P274931)
DESCRIPTION
The transmission revolution sensor (NSS) detects the secondary pulley speed and
sends it to the TCM.
The TCM determines the current gear ratio from the transmission revolution sensor
(NSS) signal.
DTC No.
Detection Item
DTC Detection Condition
PCU Interlock Circuit Open (P1CE213,P1CE292)
DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU detects that a safety device (interlock) is operated or that there is an open circuit in the detection circuit. (Even if an open circuit occurs while the vehicle is stopped, the system determines that the safety device was operated.)
