SECTION 12H - ELECTRICALLY ADJUSTABLE

REAR VISION MIRRORS

IMPORTANT

Before performing any Service Operation or other procedure described in this Section, refer to

Section 00 CAUTIONS AND NOTES for correct workshop practices with regard to safety and/or

property damage.

1. GENERAL I NFORMATI ON

Electrically adjustable exterior rear vision mirrors are fitted as standard equipment on all WH Series Models.

Each exterior mirror assembly has two internal reversible motors: one to adjust the mirror face up and down

(vertical position), the other to adjust the mirror face right and left (horizontal position).

The rear vision mirrors are adjusted from the interior of the vehicle by a mirror control switch mounted in the driver’s

side front door pull handle.

The control switch has two controls. A slide select switch that has two positions; left mirror and right mirror, and a

toggle type direction switch, which is used to control the direction of movement of the mirror face.

Additionally on Caprice Models, the exterior rear vision mirrors integrate with the memory seat and mirror system.

For additional and more comprehensive information regarding this feature, refer to Section 1A7 SEATS A ND SEAT

BELT ASSEMBLIES of the WH Service Information.

Statesman Models are fitted with a standard interior day / night mirror, while Caprice is fitted with an electro-

chromatic interior rear vision mirror, which when set to automatic, electronically changes the colour of the mirror

glass to reduce the reflection of headlamps from a following vehicle.

ELECTRO-CHROMATIC INTERIOR REAR VIEW MIRROR

An electro-chromatic interior rear vision mirror is fitted to all WH Caprice Models. The mirror features an

electronically controlled mirror cell which changes colour in response to an applied electrical voltage. This allows

automatic darkening of the mirror during night driving when headlamps from a following vehicle shine on an

integrated light sensor on the front of the mirror assembly. A second sensor is incorporated at the rear of the mirror

assembly w hich detects low ambient light (sun sensor). This second sensor ensures that this feature only works at

night time.

Incorporated on the bottom of the mirror assembly is an auto (on) / off switch. When the switch is switched from

auto to off, the mirror reverts to a standard ‘day driving’ mirror.

When the mirror is switched to the auto position and reverse gear is selected, the mirror will switch to the day

setting, regardless of the ambient light level.

2. SERVICE OPERATIONS

Service Operations for rear vision mirrors are to be found in various Sections of the VT Series Service Information

and this Supplement as per the following table:

VEHICLE COMPONENT PROCEDURE REFER

Statesman Interior rear vision mirror All Section 1A6 STATIONARY

GLASS of the WH Service

Information.

Exterior rear vision mirror All 12H ELECTRICALLY

ADJUSTABLE REAR

VISION MIRRORS of the VT

Series I Service Information.

Caprice Electro-chromatic interior

rear vision mirror All This Section.

Exterior rear vision mirror Assembly removal,

reinstallation and test. 12H ELECTRICALLY

ADJUSTABLE REAR

VISION MIRRORS of the VT

Series I Service Information.

Mirror glass removal and

reinstallation.

Mirror control switch

removal, reinstallation and

test.

Mirror switch module

removal, reinstallation and

diagnosis.

Section 1A7 SEAT & SEAT

BELT ASSEMBLIES of the

WH Service Information.

Memory seat and mirror

assembly diagnosis.

2.1 ELECTRO-CHROMATIC INTERIOR REAR VISION MIRROR

REMOVE

1. Remove mirror wiring harness cover (1) by

sliding cover upwards slightly (direction A) and

pull cover downwards (direction B).

Figure 12H-1

2. Disengage the interior mirror from the boss on

the windscreen by sliding the base of the mirror

upwards.

Figure 12H-2

3. Disconnect the interior mirror wiring harness

connector and remove the mirror.

Figure 12H-3

REINSTALL

Reinstallation of the interior rear view mirror is the

reverse of the removal procedure, noting the

following:

When installing the mirror onto the boss on the

windscreen, ensur e that it is pushed down fully and

clicks into position.

3. ELECTRO-CHROMATIC I NTERI OR REAR VISION MI RROR DIAGNOSIS

3.1 FUNCTIONAL CHECK

The f ollowing procedure should be used to c heck if

the electro-chromatic interior rear vision mirror is

functioning correctly.

1. With mirror installed, cover the ambient light

sensor at the rear of the mirror (forward facing),

using a piece of black electrical tape.

2. Turn ignition switch to ‘ON’ position.

3. Turn mirror switch to ‘AUTO’ position.

4. Observe that ‘GREEN’ LED in mirror is

illuminated.

5. Shine a beam of light (torch) into the front light

sensor (rearward facing) and ensure that the

mirror darkens.

NOTE: The f ront light sensor is located adj acent to

the green LED, to the left of the auto / off switch.

6. With ignition on, select reverse gear, mirror

should return to full reflectance (5 - 10

seconds).

7. Repeat Step 5, then turn ignition off (LED off)

Turn ignition switch to ‘OFF’ position, mirror

should again return to full reflectance (5 - 10

seconds).

NOTE: If the mirror does not function according to

the above, rem ove the m irror, as per the proc edure

detailed in this Section and proceed to the

3.3 ELECTRO-CHROMATIC INTERIOR REAR

VISION MIRROR DIAGNOSTIC CHART in this

Section.

Figure 12H-4

3.2 ELECTRO-CHROMATIC INTERIOR REAR VISION MIRROR CIRCUIT DIAGRAM &

CONNECTORS

Figure 12H-5

Figure 12H-6

3.3 ELECTRO-CHROMATIC INTERIOR REAR VISION MIRROR DIAGNOS TIC CHART

Test Description

The numbers below refer to Step numbers in the diagnostic chart for the electro-chromatic interior rear vision

mirror.

1. Ensures the Functional Check has been performed.

2. Determines if the functionality of mirror is correct.

3. Determines if the functionality of mirror is correct.

4. Checks circuits 139 and 156 for power and earth at connector YB185.

5. Checks circuit 139 for open or short to earth.

6. Checks circuit 156 for open.

7. Checks earth connection at earth location E6.

8. Checks integrity of back-up lamp circuits 24 and 42 (including operation of back-up lamp switch.

Notes on Diagnostic chart:

1. Refer to Section 12P WIRING DIAGRAMS of the VT Series I Service Information for procedures on checking

wiring faults.

STEP ACTION VALUE YES NO

1. • Has the electro-chromatic interior rear vision mirror

Functional Check been performed? Go to Step 2. Go to 3.1

FUNCTIONAL

CHECK in this

Section.

2. • In Step 5 of the Functional Check, did mirror change

colour (darken)? Go to Step 3. Go to Step 4.

3. • In Step 6 of the Functional Check, did mirror return

to full reflectance when reverse gear was selected? Mirror OK Go to Step 8.

4. • Remove electro-chromatic interior rear vision mirror,

refer 2.1 ELECTRO-CHROMATIC INTERIOR REAR

VISION MIRROR in this Section.

• Disconnect electro-chromatic interior rear vision

mirror connector YB185.

• Measure voltage between connector YB185 circuit

139 (Pink wire) and circuit 156 (Black/Blue wire)

(refer NOTE 1).

• Turn ignition ON.

• Is voltage as specified?

Battery + Go to Step 5. Replace electro-

chromatic interior

rear vision mirror

assembly, refer

2.1 ELECTRO-

CHROMATIC

INTERIOR REAR

VISION MIRROR

in this Section.

5. • With connector YB185 disconnected, measure

voltage between connector YB185 circuit 139 (Pink

wire) and a known good earth (refer NOTE 1).

• Turn ignition ON.

• Is voltage as specified?

Battery + Go to Step 6. Repair open or

short to earth in

circuit 139 as

necessary

(including fuse

F15). Recheck

and verify repair.

6. • Turn ignition OFF.

• With connector YB185 disconnected, check for

continuity between connector YB185, circuit 156

(Black/Blue wire) and earth at location E6 (body

harness earth to transmission tunnel) (refer NOTE

1).

• Does continuity exist?

Go to Step 7. Repair open in

circuit 156 as

necessary.

Recheck and

verify repair.

7. • Turn ignition OFF.

• Check for continuity between earth location E6 and

a known good earth (refer NOTE 1)?

• Does continuity exist?

Replace electro-

chromatic interior

rear vision mirror

assembly, refer

2.1 ELECTRO-

CHROMATIC

INTERIOR REAR

VISION MIRROR

in this Section.

Repair earth as

necessary.

Recheck and

verify repair.

8. • Remove electro-chromatic interior rear vision mirror,

refer 2.1 ELECTRO-CHROMATIC INTERIOR REAR

VISION MIRROR in this Section.

• Disconnect electro-chromatic interior rear vision

mirror connector YB185.

• Measure voltage between connector YB185 circuit

24 (Light Green wire) and a known good earth (refer

NOTE 1).

• Turn ignition ON.

• Select reverse gear.

• Does voltage change from 0 volts to battery + volts

when reverse gear is selected?

Replace electro-

chromatic interior

rear vision mirror

assembly, refer

2.1 ELECTRO-

CHROMATIC

INTERIOR REAR

VISION MIRROR

in this Section.

Repair back-up

lamp circuits 24

and 42 as

necessary

(including

operation of

back-up lamp

switch, refer to

Section 12B

LIGHTING

SYSTEM of the

WH Service

Information).

Recheck and

verify repair.