benzzy_ku

Now I have engine light warning on after drive 10 minutes, and check code have 2 codes.

1. P0325 Knock sensor 1 circuit (Bank 1 or Single Sensor)

2.P1885 SLS System Malfunction

Now the code of sensor is not show up.

I will try to check code as you suggest and I will let you know again.

more and more and more problem, After replace speed sensor.

On 7/12/2025 at 7:42 PM, Jeza said:

Yes, unfortunately.

Secondary pulley rotation speed sensor that detects the output shaft rotation speed is placed on the secondary pulley shaft (reduction drive gear), which is NOUT. This the top one on the diagram to the rear of the square shape bit of the gearbox.

rab0711c.pdf 37.1 kB · 0 downloads

I will try to fix it.

On 7/8/2025 at 3:32 AM, Jeza said:

P3101-548

Abnormal signal received from engine control computer (CVT system abnormality)

 

The hybrid vehicle computer performs fail-safe control based on an abnormality signal from the engine control computer (when the engine control computer detects an abnormality that may affect THS control).

 

This points to the speed sensor on the gearbox as the signal goes to the engine ECU, then the hybrid ECU goes into limp mode.

 

P1825 is the speed sensor circuit NOUT (speed out), wiring or the sensor, there are no other connectors in the circuit.  Did you check the NIN circuit to ensure you have the correct connector and pins? Just to rule out the engine ECU being faulty!! 

This sensor in below the inverter?

8 hours ago, Jeza said:

when driving

I will check for you.

2 minutes ago, Jeza said:

Do you have the data page for the HYBRID CONTROL ECU which will show gearbox speeds

When drive? or just on idle running?

On 6/26/2025 at 3:14 PM, Jeza said:

You could double check you have the correct pins on the connector, I have had this issue, by checking the good speed sensor in the transmission.

 

Same connector as above but check between pins 12 and 19; 

 

Using a Toyota electrical tester, check the resistance between the engine control computer's vehicle side connector D12 (NIN+) terminal and D19 (NIN-) terminal.

 

Reference value:

560-680Ω (20°C)

 

If you get this resistance but nothing on the NOUT pins then you know it is either the sensor or wiring. I had a look at my engine to see if I could see the sensors, but no luck with the inverter cables, hoses and other cables in the way. 

 

Kindly help to review my error code, please

After renew Transmission Oil , This is the code i found.

8 hours ago, Jeza said:

You could double check you have the correct pins on the connector, I have had this issue, by checking the good speed sensor in the transmission.

 

Same connector as above but check between pins 12 and 19; 

 

Using a Toyota electrical tester, check the resistance between the engine control computer's vehicle side connector D12 (NIN+) terminal and D19 (NIN-) terminal.

 

Reference value:

560-680Ω (20°C)

 

If you get this resistance but nothing on the NOUT pins then you know it is either the sensor or wiring. I had a look at my engine to see if I could see the sensors, but no luck with the inverter cables, hoses and other cables in the way. 

 

I will try more and let you know.

On 22/6/2568 at 5 นาฬิกา 31 นาที, Jeza said:

ดูเหมือนว่าปัญหานี้จะอยู่ที่ระบบเกียร์ ให้ตรวจสอบระดับน้ำมันเกียร์ สลับเกียร์อย่างช้าๆ จนสุดระยะและกลับไปที่ตำแหน่งจอดรถ ตรวจสอบระดับน้ำมันเกียร์ในขณะที่เครื่องยนต์ยังทำงาน เติมน้ำมันที่ถูกต้องหากจำเป็น น้ำมัน  เกียร์ CVT แท้จากโตโยต้า TC

 

P1825/67 -  เมื่อไฟ READY ติดขึ้นและยานพาหนะกำลังวิ่งด้วยความเร็ว 28 กม./ชม. หรือเร็วกว่า เซ็นเซอร์ความเร็วรอกรอง (NOUT) ตรวจจับความเร็ว 300 รอบต่อนาทีหรือต่ำกว่าเป็นเวลา 2 วินาทีหรือมากกว่านั้น

 

1. สายรัดหรือขั้วต่อ
2. เซ็นเซอร์วัดการปฏิวัติเกียร์
3. คอมพิวเตอร์ควบคุมเครื่องยนต์

หากคุณสามารถตรวจสอบข้อมูลการส่งสัญญาณสดได้ (S2000 คือเครื่องมือทดสอบของ Toyota):

ขั้นตอนการตรวจสอบ

ขั้นตอนที่ 1

การอ่านข้อมูล S2000 (ความเร็วลูกรอกรอง)

เชื่อมต่อ S2000 เข้ากับ DLC3

หมุนสวิตช์กุญแจไปที่ตำแหน่ง ON และอ่าน RPM ของรอกรองบนจอมอนิเตอร์ข้อมูล ECU ตามจอแสดงผลของ S2000

ค่าอ้างอิง:

0 รอบ/นาที (เมื่อหยุดนิ่ง)

2600r/min (ที่ความเร็วรถคงที่ (ประมาณ 60km/ชม.))

 

 

เซ็นเซอร์อยู่ใต้อินเวอร์เตอร์แน่นอนครับ!! สามารถตรวจสอบความต้านทานได้โดย; 

ถอดขั้วต่อ D ของคอมพิวเตอร์ควบคุมเครื่องยนต์

ใช้เครื่องทดสอบไฟฟ้าของโตโยต้า ตรวจสอบความต้านทานระหว่างขั้วต่อด้านยานยนต์ D13 (NOUT+) และขั้ว D20 (NOUT-) ของคอมพิวเตอร์ควบคุมเครื่องยนต์

ค่าอ้างอิง:

560-680Ω (20 องศาเซลเซียส)

 

หวังว่าคงเป็นแค่ระดับน้ำมัน!

 

rab0716c.pdf ขนาด 37.11 กิโลไบต์ - 0 ดาวน์โหลด

After check with multimeter tools , the result is 0, nothing appear on monitor.

If it is not oil level, What next damage parts you think I have to fix?

7 hours ago, Jeza said:

This looks to be a transmission issue, check the gearbox oil level, oil hot cycle the shift lever slowly though the whole range and back to Park. Check the transmission oil level with the engine running, top up if necessary with the correct oil, Toyota Genuine CVT Fluid TC.

 

P1825/67 - When the READY lamp is on and the vehicle is traveling at 28 km/h or faster, the secondary pulley speed sensor (NOUT) detects a speed of 300 rpm or less for 2 seconds or more.

 

1. Wire Harness or Connector
2. Transmission Revolution Sensor
3. Engine Control Computer

If you can monitor live transmission data, (S2000 is the Toyota test tool):

Inspection Procedure

Step 1

S2000 data reading (secondary pulley speed)

Connect S2000 to DLC3.

Turn the ignition switch ON and read the secondary pulley RPM on the ECU data monitor according to the display screen of the S2000.

Reference value:

0 r/min (when stationary)

2600r/min (at constant vehicle speed (approximately 60km/h))

 

 

The sensors are underneath the inverter of course!! The resistance can be checked by; 

Disconnect connector D of the engine control computer.

Using a Toyota electrical tester, check the resistance between the engine control computer's vehicle side connector D13 (NOUT+) terminal and D20 (NOUT-) terminal.

Reference value:

560-680Ω (20°C)

 

Hope it is just the oil level!

 

rab0716c.pdf 37.11 kB · 0 downloads

Wow, your data is so clear, I will try to check and let you know later.

Many thanks friends.^^

7 hours ago, Jeza said:

I can't find anything in the manual diagnostics for this issue and why code P1835 is not in the manual. (in the previous post I said "P1820, P1825 and P1835 are referring to transaxle transmission" that should be P1845 not P1835.

What are the symptoms when driving?

What warning lights come on?

Does the gearbox shift gears ok when accelerating?

 

When checking the resistance above was that the harness connector or the position sensor connector? I think it should be the position sensor connector.

hdam0480.pdf 125.55 kB · 0 downloads

For now When I drive , the car is feeling like save mode, I have to push harder on accelerate paddle.

Also the code that appear is P1825.

If the result is not match to your data, How should i do next?

After checked , below is show data to low. just only 0.519 kΩ

Can you help me to clarify , What I should do?

The code appear when i run a car with kick down up to the lamp.

So it is abnormal from accelerator pedal ?

Because I start engine 30 minutes without driving, the code did not show up.

The engine is normal, Air condition is normal.

Sorry for my mistake, It is should be P3101-548.

14 hours ago, Picasso said:

Welcome Theerawisit there is lots of members with the early hybrid problems im sure some one will be a long soon to help you .

Many thanks

10 hours ago, Gamith said:

Those codes could be old - have you cleared the codes and see which ones come back?

 

I already delete code but after try to ride just only 500 meters the warning light show up and the code is same.

Many thanks friend.

I have warning light , check code is P1835, P1301-548, C1310

Can any one help me to clarify above code?