MOV 1 Varistor?
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Trailering
Joined: Oct 2020
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MOV 1 Varistor?
I'm looking to repair this airbag control module (the little blue box underneath the dash) and I can't seem to find what the burnt up component is. Its labeled MOV 1 and is supposedly a varistor but to what value I have no idea....
Does anyone have any leads on information about this or what it even is for that matter, orrrrr does anyone have any extra "ACM's" ?
Lead Driver
Joined: Jun 2021
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I'm looking to repair this airbag control module (the little blue box underneath the dash) and I can't seem to find what the burnt up component is. Its labeled MOV 1 and is supposedly a varistor but to what value I have no idea....
Does anyone have any leads on information about this or what it even is for that matter, orrrrr does anyone have any extra "ACM's" ?
Thread Starter
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Trailering
Joined: Oct 2020
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When I originally disassembled it, the red circled part was bent and in contact with that heat sink directly next to it. I imagined it simply got too hot. The rest of the board looks intact as does the rest of the 'chip'...
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Trailering
Joined: Oct 2020
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My mistake, you mean the obd1 code?
As I remember there were no codes related to this or even a CEL. The only symptom that I have now is an airbag light.
Before, when it was still connected, my instrument cluster was shorted out. No speedometer, odometer, and overdrive light flashing. removing the ACM remedied thoses problems.
As I remember there were no codes related to this or even a CEL. The only symptom that I have now is an airbag light.
Before, when it was still connected, my instrument cluster was shorted out. No speedometer, odometer, and overdrive light flashing. removing the ACM remedied thoses problems.
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My mistake, you mean the obd1 code?
As I remember there were no codes related to this or even a CEL. The only symptom that I have now is an airbag light.
Before, when it was still connected, my instrument cluster was shorted out. No speedometer, odometer, and overdrive light flashing. removing the ACM remedied thoses problems.
As I remember there were no codes related to this or even a CEL. The only symptom that I have now is an airbag light.
Before, when it was still connected, my instrument cluster was shorted out. No speedometer, odometer, and overdrive light flashing. removing the ACM remedied thoses problems.
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Trailering
Joined: Oct 2020
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Oh I see, how would one go about checking that?
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Trailering
Joined: Oct 2020
Posts: 16
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for a dollar might give it a shot,
www.mouser.com - B72214S1140K501
Where'd you come by that information?
www.mouser.com - B72214S1140K501
Where'd you come by that information?
Lead Driver
Joined: Oct 2016
Posts: 6,185
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From: Houston/Sugar Land
Here you are.
Codes
12 Low Battery voltage
13 Air Bag Circuit Shorted to Ground
14 Front Air Bag Sensor and Bracket Circuit Shorted to Ground
21 Rear Air Bag Sensor and Bracket Not Mounted to Vehicle Properly
22 Rear Air Bag Sensor and Bracket Output Circuit Shorted to Battery Voltage
23 Rear Air Bag Sensor and Bracket Circuit Input Feed/Return Circuit Open
24 Rear Air Bag Sensor and Bracket Output Feed/Return Circuit Open
32 Driver Side Air Bag Circuit High Resistance or Open
34 Driver Side Air Bag Circuit Low Resistance or Shorted
41 RH Front Air Bag Sensor and Bracket Feed/Return Circuit Open
42 LH Front Air Bag Sensor and Bracket Feed/Return Circuit Open
44 RH Front Air Bag Sensor and Bracket Not Mounted to Vehicle Properly
45 LH Front Air Bag Sensor and Bracket Not Mounted to Vehicle Properly
51 Air Bag Diagnostic Monitor Internal Thermal Fuse - Fuse Blown Due to Intermittent Short to Ground
52 Backup Power Supply - Voltage Boost Fault
53 Front Air Bag Sensor and Bracket Circuits Resistance to Ground or Air Bag Diagnostic Monitor Fault
- Rapid Continuous Flashing of Air Bag Indicator (No Fault Code) All Primary Air Bag Sensors Disconnected
- No Air Bag Indicator - Inoperative Indicator Circuit or No Battery Positive Voltage to Air Bag Diagnostic Monitor
- Continuous Air Bag Indicator - Air Bag Diagnostic Monitor Disconnected or Inoperative __________________
Codes
12 Low Battery voltage
13 Air Bag Circuit Shorted to Ground
14 Front Air Bag Sensor and Bracket Circuit Shorted to Ground
21 Rear Air Bag Sensor and Bracket Not Mounted to Vehicle Properly
22 Rear Air Bag Sensor and Bracket Output Circuit Shorted to Battery Voltage
23 Rear Air Bag Sensor and Bracket Circuit Input Feed/Return Circuit Open
24 Rear Air Bag Sensor and Bracket Output Feed/Return Circuit Open
32 Driver Side Air Bag Circuit High Resistance or Open
34 Driver Side Air Bag Circuit Low Resistance or Shorted
41 RH Front Air Bag Sensor and Bracket Feed/Return Circuit Open
42 LH Front Air Bag Sensor and Bracket Feed/Return Circuit Open
44 RH Front Air Bag Sensor and Bracket Not Mounted to Vehicle Properly
45 LH Front Air Bag Sensor and Bracket Not Mounted to Vehicle Properly
51 Air Bag Diagnostic Monitor Internal Thermal Fuse - Fuse Blown Due to Intermittent Short to Ground
52 Backup Power Supply - Voltage Boost Fault
53 Front Air Bag Sensor and Bracket Circuits Resistance to Ground or Air Bag Diagnostic Monitor Fault
- Rapid Continuous Flashing of Air Bag Indicator (No Fault Code) All Primary Air Bag Sensors Disconnected
- No Air Bag Indicator - Inoperative Indicator Circuit or No Battery Positive Voltage to Air Bag Diagnostic Monitor
- Continuous Air Bag Indicator - Air Bag Diagnostic Monitor Disconnected or Inoperative __________________
Lead Driver
Joined: Jun 2021
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My mistake, you mean the obd1 code?
As I remember there were no codes related to this or even a CEL. The only symptom that I have now is an airbag light.
Before, when it was still connected, my instrument cluster was shorted out. No speedometer, odometer, and overdrive light flashing. removing the ACM remedied thoses problems.
As I remember there were no codes related to this or even a CEL. The only symptom that I have now is an airbag light.
Before, when it was still connected, my instrument cluster was shorted out. No speedometer, odometer, and overdrive light flashing. removing the ACM remedied thoses problems.
But if you WANT to try it, id think the air bag monitor can be installed with the airbag disconnected, so that you should be able to read the code flash and make sure it seems normal otherwise
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Trailering
Joined: Oct 2020
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Okay, after reconnecting, no flashes. Which I'm inclined to interpret as "inoperative indicator circuit or no battery positive voltage to air bag diagnostic monitor."
When disconnected there is simply a constant air bag indicator
I'm going to solder in the new varistor tomorrow and hopefully it all goes well
When disconnected there is simply a constant air bag indicator
I'm going to solder in the new varistor tomorrow and hopefully it all goes well
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Trailering
Joined: Oct 2020
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Out with the old and in with the new!
Looks like I was not the only one with this problem:
https://www.f150forum.com/f93/fuse-1...er-try-318760/