Electrically Heated Rear Seats

�ORElectrically Heated Rear Seat:

WIRING DIAGRAM

Electrically Heated Rear Seat - Component Location:

COMPONENT LOCATION
16 Rheostat, lighting of controls and instruments, in switch assembly between steering wheel and driver's door.
22A Main fuse board in the dashboard.
500 ICE control module
LHD:above main relay board in dashboard
RHD:behind main relay board in dashboard
503 Switch, electrically heated rear seat, in switch assembly on the centre console.
511 Relay, electrically heated rear seat, on main relay board in the dashboard.
512 Heating pad, right-hand, rear seat.
513 Heating pad, left-hand, rear seat.

2-pin connectors
H2-53 Under left-hand rear seat.
H2-54 Under right-hand rear seat.

33-pin connector
H33-3 Blue connector on the bracket below the left-hand A pillar.

Grounding Points
G4 Grounding point, centre console between the front seats.
G14 Grounding point, left-hand front seat member, under the seat.

DESCRIPTION OF OPERATION
Cars for certain markets are equipped with an electrically heated rear seat.

The heating pads are supplied with current via fuse 33 in the dashboard fuse holder.

With the ignition switch in the Drive position and switch 503 pressed, positive current is supplied to the Integrated Central Electronics (ICE) on pin 43. The ICE then grounds relay 511 via pin 13, causing the relay to operate and supply heating pads 512 and 513 with current.

Connection time is controlled. The ICE system grounds the relay for 5 minutes, waits 2.5 minutes and then grounds the relay again for 2.5 minutes. Following this, the switch must be pressed once more to start a new cycle.

During the time that current is supplied to the heating pads, an additional indicator lamp in the switch lights up regardless of the setting of the rheostat.

The heating pads can be activated during the 2.5 minute waiting period. In that case the cycle will be recommenced from the beginning.

When the ignition switch is in the Start position, the heating pads are switched OFF for a maximum of 20 seconds.


FAULT DIAGNOSIS HINTS
The heating pads will be operative when the ignition switch is in the Drive position.
1. Check that fuse 33 is intact and supplied with current.
2. Check the heating pads for continuity.
3. Check the connectors, wiring harness and ground connections.