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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action YES NO
1  Was "Electronic Stability Program Check" performed?  Go to Step 2. Go to ELECTRONIC STABILITY PROGRAM CHECK .
2  Check brake fluid level 
  1. Check brake fluid level in reservoir.

Is brake fluid level upper than the minimum level? 		 Go to Step 3. Replenish brake fluid to reservoir.
3  DTC check for ESP® 
  1. Connect scan tool to DLC with ignition switch turned OFF.
  2. Turn ignition switch ON and check DTC for ESP®.

Is DTC U1140 detected? 		 Go to DTC U1140: LOST COMMUNICATION WITH BCM (RECEPTION ERROR) . Go to Step 3.
4  Check brake fluid level switch 
  1. Turn ignition switch to OFF position.
  2. Disconnect brake fluid level switch connector.
  3. Check for proper connection at each terminal of brake fluid level switch connector.
  4. If OK, then check brake fluid level switch referring to BRAKE FLUID LEVEL SWITCH INSPECTION .

Is check result OK? 		 Go to Step 5. Replace brake fluid level switch.
5  Check brake fluid level switch circuit 
  1. Disconnect BCM connector.
  2. Check for proper connection to BCM connector at "G31-7" terminal.
  3. If OK, then check resistance between "G31-7" terminal and vehicle body ground.

Is resistance infinity? 		 Go to Step 6. "BLKL/RED" wire circuit is shorted to ground.
6  Check BCM 
  1. Connect brake fluid level switch connector and BCM connector.
  2. Check DTC for BCM.

Is there any DTC(s) in BCM? 		 Go to applicable DTC diagnosis flow for troubleshooting. Substitute a known-good ESP® hydraulic unit/control module assembly and check DTC.
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