Keyless/Power Door Locks/Security System (Driver's and Passenger's MICU, Door Multiplex Control Unit, and Front Passenger's Power Window Switch) Input Test
Check for continuity to ground: There should be continuity.
Poor ground (G501)
An open in the wire
37
BLK
Under all conditions
Check for continuity to ground: There should be continuity.
Poor ground (G502)
An open in the wire
13
WHT
Under all conditions
Measure the voltage to ground: There should be battery voltage.
Blown No. 15 (10 A) fuse in the under-hood fuse/relay box
Faulty driver's under-dash fuse/relay box
An open in the wire
14
LT GRN
Under all conditions
Measure the voltage to ground: There should be battery voltage.
Blown No. 16 (7.5 A) fuse in the driver's under-dash fuse/relay box
Faulty driver's under-dash fuse/relay box
An open in the wire
25
WHT [GRN]
Under all conditions
Measure the voltage to ground: There should be battery voltage.
Blown No. 24 (20 A) fuse in the driver's under-dash fuse/relay box
Faulty driver's under-dash fuse/relay box
An open in the wire
27
BLU [BLK]
Under all conditions (disconnect the front passenger's power window switch 37P connector)
Check for continuity between the No. 27 terminal and the front passenger's power window switch 37P connector No. 29 terminal: There should be continuity.
An open in the wire
[ ]:
RHD model
Reconnect the 37P connector to the door multiplex control unit, and make these input tests at the connector.
If any test indicates a problem, find and correct the cause, then recheck the system.