DTC 11, 12, 13 & 14: Testing
- Turn ignition off. Connect scan tool to Data Link Connector (DLC). Test drive vehicle. On scan tool, select data list item number 11, 12, 13 and 14 (ABS wheel speed sensor) output one after the other. Compare reading on scan tool to speedometer reading. If readings do not match each other, go to next step. If readings match each other, check for a condition that might cause an intermittent failure. See PRELIMINARY CHECK under TROUBLE SHOOTING.
- Inspect installation of wheel speed sensors. If wheel speed sensors are loose or improperly installed, repair as necessary. After repair, go to step 10 . If no problem is found, go to next step.
- Turn ignition off. Disconnect ABS ECU 28-pin harness connector B-118. ABS ECU is integral to ABS Hydraulic Unit (HU) bolted to right fenderwell. See Figure
. Measure resistance between specified ABS ECU harness connector terminals. See WHEEL SPEED SENSOR OUTPUT CIRCUIT IDENTIFICATION
table. See Fig 1
. Resistance value should be 1.24-1.64 k/ohms. If resistance is as specified at any speed sensor, leave harness connector disconnected and go to next step. If all wheel speed sensor terminals are not within specification, go to step 7
.WHEEL SPEED SENSOR OUTPUT CIRCUIT IDENTIFICATION
Application ABS ECU Terminals No. Left Front 16 & 26 Left Rear 27& 28 Right Front 9 & 10 Right Rear 11 & 17 - Disconnect wheel speed sensor harness connectors. Check for poor, loose, corroded or damaged terminal connections at ABS ECU, wheel speed sensor and in-line harness connectors. If problem is found, repair or replace as necessary. After repair, go to step 10 . If no problem is found, go to next step.
- Inspect individual wheel speed sensors. See WHEEL SPEED SENSOR under COMPONENT TESTS. If problem is found, repair or replace sensor as necessary. After repair, go to step 10 . If no problem is found, go to next step.
- Check for open, short to ground or short to voltage in wheel speed sensor circuits between suspect speed sensor(s) and ABS ECU. See WIRING DIAGRAMS . If problem is found, repair or replace as necessary. After repair, go to step 10 . If no problem is found, replace suspect wheel speed sensor. See WHEEL SPEED SENSOR under REMOVAL & INSTALLATION.
- Check wheel speed sensor output voltage. See WHEEL SPEED SENSOR under COMPONENT TESTS. If output voltage is as specified, go to step 9 . If output voltage is not as specified, go to next step.
- Inspect toothed rotor. See TOOTHED ROTOR under COMPONENT TESTS. If problem is found, repair or replace as necessary. If no problem is found, inspect wheel bearings for looseness or any other damage. See appropriate FRONT or REAR article in SUSPENSION. If problem is found, replace or repair as necessary and go to next step. After repair, go to step 10 .
- Check for poor, loose, corroded or damaged terminal connections in ABS ECU harness connector B-31. If problem is found, repair as necessary. After repair, go to next step. If trouble symptoms are still present, substitute a known-good ABS ECU and recheck for symptom and DTC.
- Using scan tool, recheck for symptom and DTC. If DTC does not reset, testing is complete. If DTC resets, repeat testing starting in step 1 .