DESCRIPTION The main body ECU (multiplex network body ECU) detects the condition of the parking brake switch assembly. WIRING DIAGRAM 
PROCEDURE
(a) Using the Techstream, read the Data List. Click here
OK: Normal condition listed above are displayed.
(a) Remove the parking brake switch assembly. Click here (b) Inspect the parking brake switch assembly. Click here
(a) Disconnect the 3H driver side junction block 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:
(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly. Click here (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Tundra Service Manual > Touch Select 2-4 And High-low System: Automatic Disconnecting Differential Motor Control Circuit Open (P17A0,P17A1)
DESCRIPTION This DTC is detected when an open circuit or short to ground in the A.D.D. shift motor drive circuit is detected. DTC Code DTC Detection Condition Diagnosis Condition Malfunction Status Malfunction Time Other Trouble Area P17A0 Ignition switch ON (when not switching between 2WD and 4H) O ...
