Moonroof Control Unit Input Test

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If the moonroof works OK manually, but will not work in AUTO, or reverses frequently (obstacle detection), reset the moonroof (see RESETTING THE MOONROOF CONTROL UNIT ) before proceeding with the input test

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
Remove the headliner (see HEADLINER REMOVAL/INSTALLATION )
Disconnect the 14P connector (A) from the moonroof control unit/motor (B)

Fig 1: Identifying 14P Connector Terminals And Moonroof Control Unit/Motor
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 look OK, go to step 5

With the connector still disconnected, do this input test at the following connector

If any test indicates a problem, find and correct the cause, then recheck the system
If the input test proves OK, go to step 6

WIRE TEST CONDITION REFERENCE CHART

Cavity	Wire	Test condition	Test Desired result	Possible cause if desired result is not obtained
11	PNK	Under all conditions	Check for continuity between moonroof switch 14P connector terminal No 11 and power window master switch 37P connector terminal No 27 There should be continuity	An open in the UART wire
11	PNK	Under all conditions	Check for continuity between moonroof switch 14P connector terminal No 11 and body ground There should be no continuity	A short to ground in the wire

Reconnect the connector to the control unit, and do these input tests at the following connector

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 7

WIRE TEST CONDITION REFERENCE CHART

Cavity	Wire	Test condition	Test. Desired result	Possible cause if desired result is not obtained
7	WHT	Under all conditions	Measure the voltage to ground There should be battery voltage	Blown No 20 (20 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire
8	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground There should be less than 0 2V	Poor ground (G403) or open in ground wire An open or high resistance in the wire
2	BLU	Ignition switch to ON (II), or power mode ON, moonroof switch in CLOSE position	Measure the voltage to ground There should be less than 0 2V	Faulty moonroof switch Poor ground (G501) or open in ground wire An open or high resistance in the wire High resistance between moonroof control unit terminal No 2 and moonroof switch terminal No 2
2	BLU	Ignition switch to ON (II), or power mode ON, moonroof switch released	Measure the voltage to ground There should be battery voltage	Blown No 20 (20 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box Faulty moonroof switch A short to ground in the wire
3	LT GRN	Ignition switch to ON (II), or power mode ON, moonroof switch in TILT position	Measure the voltage to ground There should be less than 0 2V	Faulty moonroof switch Poor ground (G501) or open in ground wire An open or high resistance in the wire High resistance between moonroof control unit terminal No 3 and moonroof switch terminal No 2
3	LT GRN	Ignition switch to ON (II), or power mode ON, moonroof switch released	Measure the voltage to ground There should be battery voltage	Blown No 20 (20 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box Faulty moonroof switch A short to ground in the wire
4	LT BLU	Ignition switch to ON (II), or power mode ON, moonroof switch in OPEN position	Measure the voltage to ground There should be less than 0 2V	Faulty moonroof switch Poor ground (G501) or open in ground wire An open or high resistance in the wire High resistance between moonroof control unit terminal No 4 and moonroof switch terminal No 2
4	LT BLU	Ignition switch to ON (II), or power mode ON, moonroof switch released	Measure the voltage to ground There should be battery voltage	Blown No 20 (20 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box Faulty moon roof switch A short to ground in the wire
9	PUR	Ignition switch to ON (II), or power mode ON, moonroof switch in AUTO OPEN or AUTO CLOSE position	Measure the voltage to ground There should be less than 0 2V	Faulty moonroof switch Poor ground (G501) or open in ground wire An open or high resistance in the wire High resistance between moonroof control unit terminal No 9 and moonroof switch terminal No 2
9	PUR	Ignition switch to ON (II), or power mode ON, moonroof switch released	Measure the voltage to ground There should be battery voltage	Blown No 20 (20 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box Faulty moonroof switch A short to ground in the wire

If all the input tests are OK and multiple failures are found, replace the moonroof control unit/motor assembly (see MOTOR REPLACEMENT ) If the problem is related to the key-off operation, go to the driver's MICU input test (see CONTROL UNIT INPUT TEST ), and power window master switch input test (see POWER WINDOW MASTER SWITCH INPUT TEST )