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Volume 4

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LOCATION:    12.7 Mirror, Steering Column Adjustment, Heated Mirrors (MSC)  >   23 Electrical Test Program - Test


Electrical Test Program - Test

Test scope Test connection Test condition Nominal value Possible cause/Remedy
1.0 Activation of:
Vertical adjustment motor (M21/6m1) via front driver-side door control module (N69/1)

4
M21/6

5
Outside rearview mirror-left/right (N72s8) set to left outside rearview mirror.

Ignition: ON
Press (N72s8) to:
Up adjustment:
Down adjustment:








11 - 14 V
-11 to -14 V
Wiring,
Version coding of N69/1,
See WIS document:
AD88.79-P-6000-03A
N69/1
2.0 Mirror position memory (M21/6n1)
Voltage supply to potentiometer

2 (2)
M21/6n1



3
(2)
Ignition: ON 4 - 5 V Wiring,
N69/1
3.0 Mirror position memory (M21/6n1)
Potentiometer

4 (2)

4 (2)
M21/6n1




1
(2)

2
(2)
Ignition: OFF
Carefully push mirror glass in all directions using the palm of hand.
Values change within the range of:
0.7 - 1.5k


0.3 - 1.3k



Wiring,
M21/6m1

Wiring,
M21/6m2
4.0 Mirror position memory (M21/7n1)
Voltage supply to potentiometer

2 (2)
M21/7n1



3
(2)
Ignition: ON 4 - 5 V Wiring,
N69/2
5.0 Mirror position memory (M21/7n1)
Potentiometer

4 (2)

4 (2)
M21/7n1




1
(2)

2
(2)
Ignition: OFF
Carefully push mirror glass in all directions using the palm of hand.
Values change within the range of:
0.7 - 1.5k


0.3 - 1.3k



Wiring,
M21/7m1

Wiring,
M21/7m2
6.0 Dimming interior rearview mirror
Voltage supply from roof control panel control module (N70)

4 (C)

N70




8
(C)
Ignition: ON

11 - 14 V N70
7.0 Interior illumination "ON" signal to dimming interior rearview mirror (H7) via roof control panel control module (N70)
4 (C)
N70

6
(C)
Ignition: ON
Interior illumination switched on.

11 - 14 V N70
8.0 Reverse gear engaged signal to dimming rearview mirror (H7) via roof control panel control module (N70)

4 (C)

N70

6
(C)
Ignition: ON
Reverse gear engaged.
11 - 14 V


N70
9.0 Left outside rearview
mirror (dimming)
Activation of front driver-side door control module (N69/1)

7 (2)
M21/6h1

8
(2)
Ignition: ON
Interior illumination: OFF
Cover light sensor on backside of interior rearview mirror, using tape.
Shine light beam from flashlight at glass surface of interior rearview mirror.
0 - 1, 5 V Wiring,
6.0,
Electronic mirror dimming (H7),
N69/1,
N70