DTC Troubleshooting
NOTE:
Before this trouble shooting, read and observe Precautions for DTC Troubleshooting
.
DTC TROUBLESHOOTING CHART
| Step |
Action |
YES |
NO |
| 1 |
Stop (brake) lamp switch check
- Check stop (brake) lamp switch referring to STOP (BRAKE) LAMP SWITCH INSPECTION .
Is it in good condition? |
Go to Step 2. |
Replace stop (brake) lamp switch. |
| 2 |
Stop (brake) lamp switch power circuit check
- Disconnect connector from stop (brake) lamp switch connector with ignition switch turned OFF.
- Check for proper connection to switch connector.
- If connection are OK, measure voltage between each "BLU/BLK" wire terminal and "GRN" wire terminal of stop lamp switch connector and vehicle body ground with ignition switch tuned ON.
Is each measured voltage 10 - 14 V? |
Go to Step 3. |
Check related fuse and repair defective circuit. |
| 3 |
Stop (brake) lamp switch signal circuit check
- Resistance of each "YEL/GRN" wire terminal and "GRN/WHT" wire terminal of stop (brake) lamp switch between stop (brake) lamp switch connector and ECM connector is less than 1 Ω (continuity check)
- Resistance between "YEL/GRN" wire terminal and "GRN/WHT" wire terminal of stop (brake) lamp switch connector are infinity (no continuity check)
- Resistance between each "YEL/GRN" wire terminal and "GRN/WHT" wire terminal of stop (brake) lamp switch connector and vehicle body ground is infinity (ground short check)
- Voltage of between each "YEL/GRN" wire terminal and "GRN/WHT" wire terminal of stop (brake) lamp switch connector and vehicle body ground is 0 V with ignition switch tuned ON (power short check)
Is it in good condition? |
Substitute a known-good ECM and recheck. |
Repair or replace defective wire. |