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[Solved] Suzuki Grand Vitara 2.0 Petrol J20 ECU 33920-65J0: Camshaft Position Sensor Pins & Diagram

Raywood 24198 11
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  • #1 17006273
    Raywood
    Level 12  
    Posts: 29
    Help: 5
    Rate: 16
    Hello.
    I need the ecu diagram for the 2.0 petrol engine designation j20 ecu number 33920-65j0.
    More specifically, the camshaft position sensor pins. 2 cables go to ecu
    white / red - pin 54
    Blue / black - common mass
    In contrast, black / yellow escapes to the back of the engine.

    Please help.
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    #2 17006376
    Pawel wawa
    VIP Meritorious for electroda.pl  
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    Extreme pins on the sensor 1. power supply + 5V, 3. ground, 2. middle signal and should be on pin 52 - not on 54. You did not deign to give the year, so it describes the j20A motor.
  • #3 17006650
    Raywood
    Level 12  
    Posts: 29
    Help: 5
    Rate: 16
    I missed the "a" in j20 sorry :)
    Could you specify where to look for +5?
    I have +12 on the sensor.
    Pin 52 ... you may be right. I checked quickly, 53 was described so I could go this way.
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    #4 17006988
    Pawel wawa
    VIP Meritorious for electroda.pl  
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    Probably it should be 12V, so it follows from the diagram, despite the fact that in the description they specify 5V. Sometimes these errors happen. The most important is the signal pin, whether the signal goes to the ECU. You can check with an oscilloscope or a diode. You didn't write what kind of problem you are facing.
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  • #5 17007148
    Raywood
    Level 12  
    Posts: 29
    Help: 5
    Rate: 16
    Error: p0340 A camshaft sensor signal.

    Symptoms: check control and no turnover on the counter.

    After starting the engine and resetting the error, everything returns to normal.

    If I turn the ignition on, it clears the error and starts the engine, the error is gone and everything is normal.

    The error appears only after starting the engine (it is not permanent).

    Sensor replaced.

    Sensor pins:
    1- +12
    2- ecu 54 pin (for sure) + 5v
    3- weight

    Important information: car after a flood ... that's why I put connectors on the power supply etc.
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    #6 17007166
    Pawel wawa
    VIP Meritorious for electroda.pl  
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    Raywood wrote:
    2- ecu 54 pin (for sure) + 5v
    This is the signal pin. Te + 5V is not important.
    Your problem is not the starter? I would also look at the shaft speed sensor. There must be a problem here. Roller sensor, there is nothing to the tachometer.
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    #7 17145324
    MARIANOX5
    Level 14  
    Posts: 121
    Help: 9
    Rate: 18
    To get to the shaft sensor in the j20a engine, it is hidden that without dismantling the gearbox and the flywheel can not do. I have already experienced this pain at home. As for the signal from it, the cube is above the chest. First I would search there.
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    #8 17145416
    citromaniak
    Level 23  
    Posts: 700
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    If the shaft sensor is damaged, it would never fire. Check the timing synchronization.
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    #9 17145525
    MARIANOX5
    Level 14  
    Posts: 121
    Help: 9
    Rate: 18
    There is an inductive sensor on the shaft. The position sensor of the shaft is responsible for ignition. The same is in Baleno 1.8. In older Baleno engines, the shaft sensor is not present. These are identical engine posts. Those interested are sent to the Suzuki forum.
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    #10 17146025
    pteter
    Level 11  
    Posts: 25
    Help: 1
    Rate: 21
    Hi
    Scheme Grand Vitara J20 2000-2006
    part Suzuki Grand Vitara 2.0 Petrol J20 ECU 33920-65J0: Camshaft Position Sensor Pins & Diagram Is that enough?
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    #12 17169522
    Raywood
    Level 12  
    Posts: 29
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    Rate: 16
    I haven't looked into the subject for a long time. Thank you very much for the hints. However, the problem lay on the mechanical side. 1 clove on the camshaft.
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Topic summary

✨ The discussion revolves around the ECU diagram for the Suzuki Grand Vitara 2.0 petrol engine (J20) with ECU number 33920-65J0, specifically focusing on the camshaft position sensor pins. Users clarify the pin assignments, noting discrepancies in voltage specifications (5V vs. 12V) and the importance of the signal pin. A user reports an intermittent error (P0340) related to the camshaft sensor signal, which resolves temporarily after starting the engine. Suggestions include checking the shaft speed sensor and timing synchronization, as well as providing links to diagrams and service manuals. Ultimately, the issue was identified as mechanical, related to the camshaft itself.
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FAQ

TL;DR: Grand Vitara 2.0 J20A cam sensor uses 3 pins (1:+12V, 2→ECU pin 54, 3: ground); “Error: p0340 A camshaft sensor signal” can appear only after engine start; flooding and connectors matter. [Elektroda, Raywood, post #17007148]

Why it matters: This FAQ helps DIYers quickly trace P0340 and pinout faults on Suzuki J20A without chasing the wrong wire.

Quick Facts

What is the camshaft position sensor pinout on the Suzuki Grand Vitara J20A?

Reported by the OP after testing: Pin 1 = +12 V, Pin 2 = signal to ECU pin 54, Pin 3 = ground. This configuration produced a non‑moving tach during the fault and a P0340 code after starting, but the engine ran normally after clearing. [Elektroda, Raywood, post #17007148]

According to the J20A diagram, which ECU pin carries the cam signal?

The camshaft sensor signal is specified to go to ECU pin 52 per the J20A schematic note. The author also identifies sensor pin order as 1 = +5 V (supply description), 3 = ground, and middle as signal. "Extreme pins ... 1. power supply, 3. ground" clarifies orientation. [Elektroda, Pawel wawa, post #17006376]

Should I see 5 V or 12 V at the cam sensor on J20A?

Expect 12 V present at the cam sensor feed as derived from the diagram, even though some descriptions list 5 V. The expert warns that documentation errors occur, and stresses verifying the signal line to the ECU with an oscilloscope or a diode. [Elektroda, Pawel wawa, post #17006988]

Why do I get P0340 only right after starting, then it clears?

This exact behavior was observed: the code P0340 appears after the first start, the tachometer drops, and clearing the code restores normal running. In that case, the sensor was replaced, wiring was checked, and attention shifted to timing and flood‑related connectors. [Elektroda, Raywood, post #17007148]

Can a one‑tooth cam timing error trigger P0340 on the J20A?

Yes. The thread author later confirmed the fault was mechanical: the cam timing was off by one tooth. After correcting the timing, the P0340 symptom resolved. "1 clove on the camshaft" translates to one tooth misalignment. [Elektroda, Raywood, post #17169522]

How can I quickly check if the cam signal reaches the ECU without full tooling?

Use an oscilloscope for a clean view or a simple diode test to confirm the signal toggles at the ECU pin. The advisor emphasizes that the signal wire integrity matters more than nominal supply voltage numbers when diagnosing. [Elektroda, Pawel wawa, post #17006988]

Could the starter or crankshaft speed sensor be causing my no‑tach symptom?

Yes. The expert points to possible starter issues and suggests checking the crankshaft speed sensor. He adds that the cam (roller) sensor does not drive the tachometer, so a dead tach does not prove the cam sensor failed. [Elektroda, Pawel wawa, post #17007166]

If the crankshaft sensor fails on J20A, will the engine ever start?

No. A damaged crankshaft (shaft) sensor prevents starting entirely. Quote: "If the shaft sensor is damaged, it would never fire." This helps separate crank vs. cam sensor diagnosis when facing intermittent P0340. [Elektroda, citromaniak, post #17145416]

Where is the crankshaft sensor located on the J20A, and how hard is it to access?

It sits hidden near the flywheel; accessing it can require removing the gearbox and flywheel. The connector plug is above the transmission, which you can reach to test the harness before disassembly. [Elektroda, MARIANOX5, post #17145324]

Is there a wiring diagram for the 2000–2006 Grand Vitara J20?

Yes. A forum member shared a schematic excerpt covering Grand Vitara J20 models from 2000–2006. Use it to cross‑check ECU pin numbers when tracing the cam sensor circuit. [Elektroda, pteter, post #17146025]

Where can I find a service manual for deeper troubleshooting?

A contributor linked a service resource for the SQ420 platform. It provides system descriptions and can supplement the shared schematic when validating sensor specs and timing procedures. "Here is the service" with the link was provided. [Elektroda, MARIANOX5, post #17146197]

My Vitara was flood‑damaged. What should I check before replacing more parts?

Inspect and remake sensor and ECU connectors, verify power, grounds, and the signal wire. In the case discussed, the car was flooded, connectors were refitted, the sensor was replaced, yet P0340 persisted until a mechanical timing error was fixed. [Elektroda, Raywood, post #17007148]

Is the crank sensor inductive on these engines, and what does it control?

Yes. The crankshaft sensor is inductive and is responsible for ignition. The poster notes similar behavior on Baleno 1.8 and earlier engines, highlighting platform commonality for diagnosis context. [Elektroda, MARIANOX5, post #17145525]

How do I test the cam sensor signal in three quick steps?

  1. Back‑probe the ECU cam signal pin with an oscilloscope or LED/diode probe.
  2. Crank the engine and observe a pulsing waveform or flashing LED.
  3. If no pulse, inspect the signal wire continuity and connector pins before suspecting the sensor. [Elektroda, Pawel wawa, post #17006988]
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