TERMINALS OF ECU 1. CHECK TRAILER BRAKE CONTROL ECU (BRAKE CONTROL WITH BRACKET RELAY) (a) Disconnect the J172 trailer brake control ECU (brake control with bracket relay) connector and measure the voltage or resistance on the wire harness side. ![]()
(b) Connect the J172 trailer brake control ECU (brake control with bracket relay) connector. (c) Measure the voltage and resistance according to the value(s) in the table below. If the result is not as specified, the ECU may be malfunctioning. ![]()
HINT: Measure the values on the wire harness side while the connector is connected.
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Toyota Tundra Service Manual > Tire And Wheel System: How To Proceed With Troubleshooting
PROCEDURE 1. CHECK TIRE AND WHEEL SYSTEM DIAGNOSIS OF IRREGULAR TIRE WEAR GO TO STEP 9 DIAGNOSIS OF TIRE VIBRATION 2. TIGHTEN WHEEL NUTS NEXT 3. INSPECT TIRES Click here NG GO TO STEP 6 OK 4. INSPECT AND/OR ADJUST WHEEL BALANCE Click here NEXT 5. INSPECT FRONT AXLE HUB BEARING LOOSENESS AND AXLE HUB ...