Vehicle Electrical Systems And Diagnostics

���`Diagnostics:

WIRING DIAGRAM

Diagnostics: Component Location:

COMPONENT LOCATION

Diagnostics: Component ID:

COMPONENT ID
22A Main fuse board in the dashboard.
216 ACC control module in centre of dashboard.
289 Anti-theft alarm control module under left-hand front seat.
331 Airbag control module under the centre console behind the handbrake.
357K Control module, electrically adjustable driver's seat with memory, under the seat.
353B Radio and cassette player, in centre of
353C dashboard.
430 Trionic control module behind side trim on right-hand side.
445 Data link connector (16-pin), under the dashboard adjacent to the
(H16-1) steering wheel.
500 Integrated Central Electronics (ICE) control module
LHD: above main relay board in dashboard
RHD: behind main relay board in dashboard
502 Transmission control module (TCM) in cabin on right-hand side of bulkhead partition.
505 Control module, M2.10.2, behind side trim on right-hand side.
507 TCS control module under the right-hand front seat.
510 Control module, M2.8.1, behind side trim on right-hand side.
540B Main instrument display panel 2
541B SID unit 2
540C SID unit 3
547 ABS control module integrated with the brake unit behind the battery.

33-Pin Connectors
H33-2 Black connector on bracket below the left-hand A pillar.
H33-3 Blue connector on the bracket below the left-hand A pillar.
H33-4 On the bulkhead partition behind the glove box.

GROUNDING POINTS
G33P Grounding point, connector bracket (Power) below the left-hand A pillar.
G33S Grounding point, connector bracket (Signal) below the left-hand A pillar.

DESCRIPTION OF OPERATION
For diagnosis of the car's electronic systems, a 16-pin data link connector is located under the dashboard adjacent to the steering column.

Current is supplied to the data link connector via fuse 13. The connector has power ground on pin 4 and signal ground on pin 5.

The following systems are connected to the data link connector as indicated:
Pin 1 Main instrument display panel 2(540B)
Audio 2 and 3 (359B,C)
SID units 2 and 3 (541B, C)
ACC unit (216)

Pin 4 Power ground
Pin 5 Signal ground
Pin 6 Lamp-flash code (I lead)
Motronic
Motronic
Pin 7 TCM (502)
Motronic 2.10.3 (505)
Motronic 2.8.1 (510)
Trionic (430)
Pin 8 Airbag (331)
ABS (547)
Integrated Central Electronics (ICE) (500)
TCS (507)
Anti-theft alarm (289)
Electrically adjustable driver's seat (357)
Pin 9 Main instrument display panel 2(540B)
Audio 2 and 3 (353B, C)
SID units 2 and 3 (541B, C)
ACC unit (216)
Pin 11 Electrically adjustable driver's seat (357K)
Pin 16 Power supply (+30 circuit)

FAULT DIAGNOSIS HINTS
1. Check that fuse 13 is intact and supplied with current.
2. Check that communication can be established with other systems connected to the same connector. If negative, check the wiring.
3. Check the wiring harness, connectors and ground connections.