Troubleshooting with no control module connected: Diagnosis/troubleshooting
DIAGNOSIS/TROUBLESHOOTING CHART
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check Porsche System Tester II No. 9588 connections: |
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Go to Step 2 | Repair Porsche System Tester II No. 9588 → End |
| 2 | Check fuses and voltages present in fuse carrier at left of dashboard: |
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11. 4 to 14.5 V Go to Step 3 |
Replace any faulty fuse(s) (before doing so, check that the correct fuse was used). If the fuses are intact but there is no voltage, check the wires and repair them if necessary. If the wires are intact, check the fuse box and replace it if faulty. → End |
| 3 | Check terminal 30 power supply of Vehicle electrical system control module' |
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11. 4 to 14.5 V Go to Step 4 |
Repair terminal 30 power supply of Vehicle electrical system control module'. → End |
| 4 | Check terminal 15 power supply of Vehicle electrical system control module' |
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11. 4 to 14.5 V Go to Step 5 |
Repair terminal 15 power supply of Vehicle electrical system control module'. → End |
| 5 | Check terminal 31 ground supply for open circuit: |
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< 5 Ω Go to Step 6 |
Between vehicle electric system control module plug 'Body ground': Open circuit, contact resistance/corroded or loose connection at 'body ground'. Repair wire or fasten it to ground pin. → End |
| 6 | Check 'K-line' for short circuit to B+: |
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< 0.3 V Go to Step 7 |
Repair K' line → End |
| 7 | Check 'K-line' for short circuit to ground: |
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∞ Ω Go to Step 8 |
Repair K' line → End |
| 8 | Check 'K' line' for open circuit |
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< 0.5 Ω Go to Step 9 |
Repair K' line → End |
| 9 | Check gateway in instrument cluster: | Gateway in instrument cluster is OK if:
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Go to Step 10 | Replace instrument cluster. → End |
| 10 | CAN comfort, check connection to Vehicle electrical system control module' |
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If CAN check is OK: Go to Step 11 |
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| 11 | Replace vehicle electrical system control module | Code new Vehicle electrical system control module' → End |
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