logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda
3D printer for home or business?
3D printer for home or business? Here are the perfect 3D printers to start with »
ADVERTISEMENT

Airflow Malfunction in 2004 Suzuki Grand Vitara 2.0 Diesel: Relay, Fuse 43, and Blower Tests

sadek1979 21045 12
ADVERTISEMENT
This content has been translated flag-pl » flag-en View the original version here
Report a violation of the law
| New topic
  • #1 16902419
    sadek1979
    Cars specialist  
    Toy car as in topic. The airflow inside does not work. There is neither voltage nor mass to the fan. There are 4 wires to the resistor. Two thick and two thin. on 3 of them is mass. Evidently power off. The tested fuse 43 and the checked relay under the storage compartment (it's probably this one). There is power to the relay, making a jumper on the relay does nothing. Maybe some of my colleagues have a diagram to see what else I can check.
    The blower works for a short time. After connecting the computer in the measuring blocks, it sees the blower on and off, shows blower gears. It will clarify the car - Grand Vitara 2004 2.0 diesel engine.
    Attachments:
    • Airflow Malfunction in 2004 Suzuki Grand Vitara 2.0 Diesel: Relay, Fuse 43, and Blower Tests IMG-20171218-WA0006.jpeg (522.09 KB) You must be logged in to download this attachment.
    • Airflow Malfunction in 2004 Suzuki Grand Vitara 2.0 Diesel: Relay, Fuse 43, and Blower Tests IMG-20171218-WA0002.jpeg (1.39 MB) You must be logged in to download this attachment.
  • ADVERTISEMENT
  • #3 16903760
    sadek1979
    Cars specialist  
    I will say that I did not check but it did not catch my eye. I will check it carefully in the afternoon. Do you have Piotr's piece of the diagram?

    Added after 8 [hours] 21 [minutes]:

    Webasta is missing.
  • #4 16922372
    sadek1979
    Cars specialist  
    Gentlemen, I am conquering the topic and I am still asking for your hints. So far checked resistor - replaced with another one. Replaced fan because the previous one went hard. Checked cables from panel to resistor. They are whole and have no short circuit. I miss the relay control voltage (green / yellow). I gave a short voltage there, the relay shorted and the fan started. The problem is that there are no blower gears. Only 7th and 8th gears work. In the parameters, the computer sees that in 1st gear it gives 4 v, in 2 gives 6v ...... in 8 gear 14 v. You can also see the gears like turning the knob 1,2, .... 8, also sees the blower off. Maybe you had similar problems with a suzuki grand vita ??? I'm not sure about the resistor because it's probably he who controls the blower gears. And then there is the control of the blower relay. According to the scheme goes from the fuse after ignition.
  • ADVERTISEMENT
  • #5 16922376
    szymitsu21
    VIP Meritorious for electroda.pl  
    Take the meter and see if the voltage at the control pin next to the resistor.

    If so, a scrap resistor.
  • #6 16922585
    Ireneo
    Level 42  
    szymitsu21 wrote:
    Take the meter and see if the voltage at the control pin next to the resistor.

    If so, a scrap resistor.

    The resistor replaced.
  • ADVERTISEMENT
  • #7 16922719
    szymitsu21
    VIP Meritorious for electroda.pl  
    Ireneo wrote:
    szymitsu21 wrote:
    Take the meter and see if the voltage at the control pin next to the resistor.

    If so, a scrap resistor.

    The resistor replaced.


    Well, but still some problem. In this way, it will exclude control and power will be ...
  • #8 16923193
    sadek1979
    Cars specialist  
    The first fault, as I wrote, is the lack of power for the fan relay located on the passenger side next to the blower - yellow / green wire. I checked two wires coming from the climatronic panel to the resistor. No short circuit or damage. On one of them the value should change as I turn the knob. Nothing changes on one or the other. That's why I'm betting on the panel. Something inside reads the position of the knob, the power change but some executive element has a big ... Anything else can affect the fan speed ??? It should be that the knob for the resistor and he for the blower.
  • ADVERTISEMENT
  • #9 16923487
    szymitsu21
    VIP Meritorious for electroda.pl  
    No, nothing affects speed. If there is power, then after applying the control voltage it is ********
    Not long ago I did suzuki liane I think it's the same. There, the resistor just fell ...
    I have such a small cool something I connect to the resistor gives him the voltage he wants and see if everything is ok on this side
  • #10 16923506
    sadek1979
    Cars specialist  
    It is precisely that he lacks this variable power supply. These two wires go to the resistor from the panel. Should one of them give variable values after turning the knob. And the other ???? .
  • Helpful post
    #11 16923522
    szymitsu21
    VIP Meritorious for electroda.pl  
    Exactly. One of them is to give variable values. I don't remember the second one :(
  • Helpful post
    #12 16923595
    Raywood
    Level 12  
    The second can be from air conditioning.
    It gives a signal to the relay with the fan on and allows the compressor to work.
  • #13 16924054
    sadek1979
    Cars specialist  
    And you are both right because I was surprised that when I turn on the blower for a short time, the engine starts working differently. Today, if I find the time, I'll take it short and replace the panel and possibly the resistor. I'll give a sign. greetings


    after a break I reply that the blower RESISTOR was damaged. I don't know how exactly it works, but when damaged, the values did not change. After replacing the resistor on one thin wire, the values changed and the gears returned. Thank you for your suggestions. Best regards and all the best in the New Year.
| New topic
Report a violation of the law

Topic summary

✨ The discussion revolves around an airflow malfunction in a 2004 Suzuki Grand Vitara 2.0 Diesel, where the blower fan fails to operate correctly. The user reports no voltage or mass to the fan, despite checking fuse 43 and the relay. Various components, including the blower resistor and fan, have been replaced, but issues persist with the blower gears only functioning at certain settings. The user identifies a lack of control voltage at the resistor and suspects the climatronic panel may be faulty. After further investigation, it is determined that the blower resistor was damaged, leading to the resolution of the issue upon its replacement, restoring proper functionality to the blower gears.
Generated by the language model.

FAQ

TL;DR: On a 2004 Grand Vitara 2.0 diesel with 8 blower speeds, a failed blower resistor was the root cause; “resistor was damaged.” [Elektroda, sadek1979, post #16924054]

Why it matters: This FAQ helps DIYers quickly confirm power, relay control, and the resistor so cabin airflow is restored.

Quick Facts

How do I diagnose no airflow on a 2004 Grand Vitara 2.0 diesel?

Verify Fuse 43, then check for power and ground at the blower and resistor. Inspect the passenger-side blower relay and the green/yellow relay control wire. If the relay clicks only when externally powered and speeds 7–8 work, suspect the blower resistor module. Finish by confirming the HVAC panel sends a varying control signal to the resistor. [Elektroda, sadek1979, post #16922372]

Where is the blower relay and what wire controls it?

The blower relay sits on the passenger side near the blower housing. The relay’s control is on a green/yellow wire. When you feed that control wire, the relay engages and the fan can run, confirming the downstream circuit. Lack of control voltage indicates an upstream issue in panel output or wiring. [Elektroda, sadek1979, post #16922372]

Why do only high blower speeds work?

When only speeds 7–8 operate, the resistor pack or its control path is compromised. In the thread case, replacing the resistor restored all eight speeds. Quote: “Resistor was damaged.” That points to a failed resistor transistor or thermal fuse inside the module. [Elektroda, sadek1979, post #16924054]

What voltage should the HVAC panel send to the blower resistor?

The panel outputs a varying control voltage as you select speeds; recorded values ranged from about 4 V at speed 1 up to roughly 14 V at speed 8. If those values do not change at the resistor connector, the resistor or the panel/wiring is at fault. [Elektroda, sadek1979, post #16922372]

How do I test the blower resistor quickly?

Use a multimeter on the thin control wire at the resistor. Turn the speed knob and watch for changing voltage. If you see a stable value or no change, swap in a known-good resistor and retest. A restored gradient confirms a failed resistor module. [Elektroda, szymitsu21, post #16922376]

Can I bypass the relay to see if the fan runs?

Jumpering the relay power contacts may not spin the fan if the control side is missing. In the thread, adding control voltage to the green/yellow pin clicked the relay and the blower ran, proving the motor and power path were intact. [Elektroda, sadek1979, post #16922372]

What does the second thin wire to the resistor do?

One thin wire carries the variable speed-control signal. The other thin wire can relate to A/C logic, enabling the blower signal that allows compressor engagement when the fan is on. This ties blower operation to A/C permissives. [Elektroda, Raywood, post #16923595]

Is the climate control panel a common failure for no blower speeds?

Panel output was suspected when no variable voltage appeared at the resistor. However, replacing the resistor restored proper voltage change and speeds. Confirm panel output at the resistor before condemning the panel to avoid unnecessary replacement. [Elektroda, sadek1979, post #16924054]

What basic tools do I need for this diagnosis?

Use a digital multimeter, back-probing leads, and access to the passenger kick panel. Optional: a fused jumper wire to test the relay control on the green/yellow lead. These tools verified power, control voltage, and relay function in the thread. [Elektroda, sadek1979, post #16922372]

What is Webasto, and does it affect the blower issue here?

Webasto is an auxiliary heater brand. The user checked for its presence; none was installed. It did not factor into the diagnosis or fix for the blower on this vehicle. [Elektroda, T5, post #16902546]

My blower shows neither voltage nor ground at the motor. What next?

Confirm Fuse 43 continuity and inspect grounds. Then test the relay: ensure the control side receives voltage on the green/yellow wire. If applying control voltage makes the blower run, troubleshoot the control signal path and the resistor module. [Elektroda, sadek1979, post #16902419]

How do I verify a resistor fault in three steps?

  1. Back-probe the thin control wire at the resistor and rotate the fan-speed knob.
  2. Look for voltage changing from low (≈4 V) to high (≈14 V) across speeds.
  3. If no change, install a known-good resistor; recheck for restored speed steps. [Elektroda, sadek1979, post #16922372]

Could a stiff or failing blower motor cause speed loss?

Yes. A dragging motor increases current and can overheat the resistor module, accelerating failure. In the thread, the original fan “went hard,” and replacing the fan and the resistor restored correct operation. This is an edge case worth checking early. [Elektroda, sadek1979, post #16922372]

What if the relay has power but jumping it does nothing?

If a jumper across power contacts fails, confirm the motor ground and the control side. In the reported case, the relay had power, but only adding control voltage engaged it and ran the blower. That pointed upstream to the resistor control circuit. [Elektroda, sadek1979, post #16902419]

Do wiring checks between the panel and resistor matter?

Yes. The user verified both thin wires from the panel to the resistor had continuity and no shorts. This isolated the failure to the resistor module rather than the harness. Always confirm wiring before replacing control units. [Elektroda, sadek1979, post #16922372]
Generated by the language model.
ADVERTISEMENT