Moonroof Motor-Control Unit Input Test
NOTE:
Before testing, make sure the No. C18 (20 A) and No. C39 (7.5 A) fuses in the under-dash fuse/relay box are OK.
If the moonroof works OK manually, but will not work in AUTO, or reverses frequently (obstacle detection), reset the moonroof control unit before proceeding with the input test.

1.
Turn the vehicle to the OFF (LOCK) mode.

2.
3.
Inspect the connector and socket terminals to be sure they are all making good contact:
If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals are OK, go to step 4.

4.
With the connectors still disconnected, do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 5.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
11
GRN
Disconnect under-dash fuse/relay box connector G (10P)
Check for continuity between terminal No. 11 and under-dash fuse/relay box connector G (10P) terminal No. 5:
There should be continuity
An open or high resistance in the wire
Check for continuity to ground:
There should be no continuity.
A short to ground in the wire

5.
Reconnect the connector, and do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, replace the moonroof control unit/motor.

NOTE: After replacing the moonroof control unit/motor, do the moonroof control unit resetting procedure.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
1
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. C18 (20 A) fuse in the under-dash fuse/relay box
Faulty under-dash fuse/relay box
An open or high resistance in the wire
4
BLK
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G401)
An open or high resistance in the ground wire
9
TAN
Vehicle ON mode, and moonroof switch in CLOSE position
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty moonroof switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode, and moonroof switch released
Measure the voltage to ground:
There should be battery voltage.
Faulty moonroof switch
A short to ground in the wire
8
LT GRN
Vehicle ON mode, and moonroof switch in TILT position
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty moonroof switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode, and moonroof switch released
Measure the voltage to ground:
There should be battery voltage.
Faulty moonroof switch
A short to ground in the wire
7
LT BLU
Vehicle ON mode, and moonroof switch in OPEN position
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty moonroof switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode, and moonroof switch released
Measure the voltage to ground:
There should be battery voltage.
Faulty moonroof switch
A short to ground in the wire
14
PUR
Vehicle ON mode, and moonroof switch in AUTO (OPEN) or AUTO (CLOSE) position
Measure the voltage to ground:
There should be less than 0.2 V.
Faulty moonroof switch
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire
Vehicle ON mode, and moonroof switch released
Measure the voltage to ground:
There should be battery voltage.
Faulty moonroof switch
A short to ground in the wire