DESCRIPTION This circuit is from the parking brake switch assembly to the radio and display receiver assembly. WIRING DIAGRAM ![]() PROCEDURE
(b) Check that the display changes between ON and OFF according to the parking brake operation. OK:
HINT: This display is updated once per second. As a result, it is normal for the display to lag behind the actual parking brake operation.
(a) Disconnect the J139 radio and display receiver assembly connector. (b) Disconnect the A5 parking brake switch assembly connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the parking brake switch assembly (See page
(b) Inspect the parking brake switch assembly (See page
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Toyota Tundra Service Manual > Automatic Transmission System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART HINT: If a DTC is output during the DTC check, check the parts listed in the table below and proceed to the "See page" given. *1: "Comes on" means the Malfunction Indicator Lamp (MIL) illuminates. *2: "DTC stored" means the ECM stores the trouble code if the ECM detects ...