Test R - Anti-Lock Indicator Off Fault

Perform ABS/TCS functional check before proceeding. See Figure . Turn ignition off. Connect Tech 1 scan tester to DLC. Turn ignition switch to RUN position.
Enter diagnostic mode of Tech 1 scan tester. After entering diagnostic mode, disconnect scan tester, and go to next step. If diagnostic mode cannot be entered, disconnect scan tester. Perform TEST Q first and then TEST S.
Turn ignition off. Disconnect EBCM/EBTCM electrical connector. Connect Pinout Box (J-38716). Measure resistance between pinout box pin No. 1 and DLC terminal No. 4. See Figure and Figure .
Resistance should be less than 5 ohms. If resistance is not as specified, check and repair open in circuit No. 251 (Black/White wire).
Disconnect ABS main relay. Turn ignition switch to RUN position. Measure voltage between pinout box pins No. 19 and 52. Battery voltage should be present. If battery voltage is not present, check for open in ANTI-LOCK indicator bulb and circuit No. 852 (White wire).
If bulb and White wire is okay, replace information center (models with RPO Code UB3) or instrument cluster (models with RPO Code U23).
Turn ignition off. Disconnect anti-lock diode and check for damage. Replace if necessary. Check diode polarity.
Turn ignition switch to RUN position. Connect a fused jumper wire between pinout box pins No. 19 and 52. ANTI-LOCK warning light should remain on. If warning light is not on, check and repair short to battery voltage in circuit No. 852 (White wire).
NOTE: If a short to battery is found, inspect anti-lock diode and main relay for possible damage.
If all measurements are within specification, check EBCM/EBTCM connector terminals for poor contact. If EBCM/EBTCM terminals are okay, replace EBCM/EBTCM. After all repairs are complete, clear codes, and repeat ABS/TCS functional check. See Figure .