Droid Not Pingable on Smart Cart
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Background
Section titled “Background”This troubleshooting guide is used when you are having trouble communicating with a Droid in maintenance. The issue manifests as no nodes showing up when running ping_devices from the Smart Cart, despite the Droid being on. The steps below help identify whether the issue is with the Smart Cart or Droid by taking you through multimeter measurements of the Zip-Droid contact points.
Required Equipment
Section titled “Required Equipment”- Multimeter
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
does-the-smart-cart-work-with-another-droid{"<small><b>Step 1</b></small><br/>Question: Does the Smart Cart work with another..."}
smart-cart-does-not-work-with-another-droid{{"<small><b>Step 2</b></small><br/>Escalation: The Smart Cart does not work with ano..."}}
make-sure-the-droid-is-off["<small><b>Step 3</b></small><br/>Action: Make sure the Droid is off before tak..."]
select-the-droid-connector-layout{"<small><b>Step 4</b></small><br/>Question: Which Droid connector layout are you ..."}
use-the-6-pin-layout["<small><b>Step 5</b></small><br/>Action: For a 6-pin Droid, use the standard l..."]
use-the-8-pin-layout["<small><b>Step 6</b></small><br/>Action: For an 8-pin Droid, use the layout be..."]
set-the-multimeter-to-resistance-mode["<small><b>Step 7</b></small><br/>Action: Put the multimeter into resistance mode."]
take-the-three-resistance-measurements["<small><b>Step 8</b></small><br/>Action: Measure resistance. Polarity and wire..."]
are-the-measurements-nominal{"<small><b>Step 9</b></small><br/>Question: Are the measurements nominal?"}
try-another-smart-cart["<small><b>Step 10</b></small><br/>Action: The Droid has measured healthy. Try a..."]
does-the-issue-persist-on-another-smart-cart{"<small><b>Step 11</b></small><br/>Question: Does the issue still follow the Droid..."}
escalate-the-smart-cart-issue{{"<small><b>Step 12</b></small><br/>Escalation: The issue appears to be with the Smar..."}}
escalate-the-droid-issue{{"<small><b>Step 13</b></small><br/>Escalation: The issue still follows the Droid. Es..."}}
take-photos-with-the-multimeter-in-view["<small><b>Step 14</b></small><br/>Action: The measurements are not nominal. Tak..."]
swap-the-droid-brain-and-repeat-the-measurements["<small><b>Step 15</b></small><br/>Action: Swap out the Droid brain using the f..."]
are-the-repeat-measurements-nominal{"<small><b>Step 16</b></small><br/>Question: Are the repeat measurements nominal a..."}
try-another-smart-cart-after-brain-swap["<small><b>Step 17</b></small><br/>Action: The Droid has measured healthy after ..."]
does-the-issue-persist-after-brain-swap{"<small><b>Step 18</b></small><br/>Question: Does the issue still follow the Droid..."}
escalate-the-smart-cart-issue-after-brain-swap{{"<small><b>Step 19</b></small><br/>Escalation: The issue appears to be with the Smar..."}}
escalate-the-droid-issue-after-brain-swap{{"<small><b>Step 20</b></small><br/>Escalation: The issue still follows the Droid aft..."}}
escalate-the-persistent-droid-issue{{"<small><b>Step 21</b></small><br/>Escalation: The measurements are still not nomina..."}}
does-the-smart-cart-work-with-another-droid -->|Yes| make-sure-the-droid-is-off
does-the-smart-cart-work-with-another-droid -->|No| smart-cart-does-not-work-with-another-droid
make-sure-the-droid-is-off --> select-the-droid-connector-layout
select-the-droid-connector-layout -->|6-pin Droid| use-the-6-pin-layout
select-the-droid-connector-layout -->|8-pin Droid| use-the-8-pin-layout
use-the-6-pin-layout --> set-the-multimeter-to-resistance-mode
use-the-8-pin-layout --> set-the-multimeter-to-resistance-mode
set-the-multimeter-to-resistance-mode --> take-the-three-resistance-measurements
take-the-three-resistance-measurements --> are-the-measurements-nominal
are-the-measurements-nominal -->|Yes| try-another-smart-cart
are-the-measurements-nominal -->|No| take-photos-with-the-multimeter-in-view
try-another-smart-cart --> does-the-issue-persist-on-another-smart-cart
does-the-issue-persist-on-another-smart-cart -->|No| escalate-the-smart-cart-issue
does-the-issue-persist-on-another-smart-cart -->|Yes| escalate-the-droid-issue
take-photos-with-the-multimeter-in-view --> swap-the-droid-brain-and-repeat-the-measurements
swap-the-droid-brain-and-repeat-the-measurements --> are-the-repeat-measurements-nominal
are-the-repeat-measurements-nominal -->|Yes| try-another-smart-cart-after-brain-swap
are-the-repeat-measurements-nominal -->|No| escalate-the-persistent-droid-issue
try-another-smart-cart-after-brain-swap --> does-the-issue-persist-after-brain-swap
does-the-issue-persist-after-brain-swap -->|No| escalate-the-smart-cart-issue-after-brain-swap
does-the-issue-persist-after-brain-swap -->|Yes| escalate-the-droid-issue-after-brain-swap
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style smart-cart-does-not-work-with-another-droid fill:#fef3c7,stroke:#f59e0b,color:#78350f
style make-sure-the-droid-is-off fill:#dcfce7,stroke:#22c55e,color:#14532d
style select-the-droid-connector-layout fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style use-the-6-pin-layout fill:#dcfce7,stroke:#22c55e,color:#14532d
style use-the-8-pin-layout fill:#dcfce7,stroke:#22c55e,color:#14532d
style set-the-multimeter-to-resistance-mode fill:#dcfce7,stroke:#22c55e,color:#14532d
style take-the-three-resistance-measurements fill:#dcfce7,stroke:#22c55e,color:#14532d
style are-the-measurements-nominal fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style try-another-smart-cart fill:#dcfce7,stroke:#22c55e,color:#14532d
style does-the-issue-persist-on-another-smart-cart fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style escalate-the-smart-cart-issue fill:#fef3c7,stroke:#f59e0b,color:#78350f
style escalate-the-droid-issue fill:#fef3c7,stroke:#f59e0b,color:#78350f
style take-photos-with-the-multimeter-in-view fill:#dcfce7,stroke:#22c55e,color:#14532d
style swap-the-droid-brain-and-repeat-the-measurements fill:#dcfce7,stroke:#22c55e,color:#14532d
style are-the-repeat-measurements-nominal fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style try-another-smart-cart-after-brain-swap fill:#dcfce7,stroke:#22c55e,color:#14532d
style does-the-issue-persist-after-brain-swap fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style escalate-the-smart-cart-issue-after-brain-swap fill:#fef3c7,stroke:#f59e0b,color:#78350f
style escalate-the-droid-issue-after-brain-swap fill:#fef3c7,stroke:#f59e0b,color:#78350f
style escalate-the-persistent-droid-issue fill:#fef3c7,stroke:#f59e0b,color:#78350f Hover or focus a block to preview it. Select the block to keep the preview open.
1 question
Does the Smart Cart work with another Droid?
2 escalation
The Smart Cart does not work with another Droid. Try another Smart Cart. If you suspect a Smart Cart issue, escalate to P2 Smart Carts.
3 action
Make sure the Droid is off before taking any measurements.
4 question
Which Droid connector layout are you working on?
5 action
For a 6-pin Droid, use the standard layout below to identify the measurement points.
6 action
For an 8-pin Droid, use the layout below to identify the measurement points.
7 action
Put the multimeter into resistance mode.
8 action
Measure resistance. Polarity and wire colors do not matter.
- ETH P to ETH N: nominally approximately 2 kOhm.
- ETH P to GND: nominally approximately 100–101 kOhm.
- ETH N to GND: nominally approximately 100–101 kOhm.
- ETH P to ETH N: nominally approximately 2 kOhm.
- ETH P to GND: nominally approximately 100–101 kOhm.
- ETH N to GND: nominally approximately 100–101 kOhm.
9 question
Are the measurements nominal?
10 action
The Droid has measured healthy. Try another Smart Cart.
11 question
Does the issue still follow the Droid on another Smart Cart?
12 escalation
The issue appears to be with the Smart Cart. Escalate to P2 Smart Carts.
13 escalation
The issue still follows the Droid. Escalate to Powertrain On Call.
14 action
The measurements are not nominal. Take photos for the engineer with the multimeter in view. Here is an example photo.
15 action
Swap out the Droid brain using the following Zerp template and repeat the three resistance measurements.
16 question
Are the repeat measurements nominal after swapping the Droid brain?
17 action
The Droid has measured healthy after the brain swap. Try another Smart Cart.
18 question
Does the issue still follow the Droid on another Smart Cart after the brain swap?
19 escalation
The issue appears to be with the Smart Cart. Escalate to P2 Smart Carts.
20 escalation
The issue still follows the Droid after the brain swap. Escalate to Powertrain On Call.
21 escalation
The measurements are still not nominal after swapping the Droid brain. Escalate to Powertrain On Call.
Resolution note
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