DTC Troubleshooting

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 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® Connect scan tool to DLC with ignition switch turned OFF. Turn ignition switch ON and check DTC for ESP®. Is DTC U0073 and/or U0140 detected?	Go to applicable DTC diag. flow.	Go to Step 3.
4	Check brake fluid level switch Turn ignition switch to OFF position. Disconnect brake fluid level switch connector. Check for proper connection at each terminal of brake fluid level switch connector. If OK, then check brake fluid level switch. Refer 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 Disconnect BCM connector. Check for proper connection to BCM connector at "G31-7" terminal. If OK, then check resistance between "G31-7" terminal and vehicle body ground. Is resistance infinity?	Go to Step 6.	"RED/BLK" wire circuit is shorted to ground.
6	Check BCM Connect brake fluid level switch connector and BCM connector. Check voltage at "G31-7" terminal of BCM. Refer to INSPECTION OF BCM AND ITS CIRCUITS . Is voltage in good condition?	Substitute a known-good ESP® hydraulic unit/control module assembly and recheck.	Check BCM power and ground circuit. If circuit is OK, substitute a known-good BCM and recheck.