System Diagram

�O,Starting And Charging Systems:

WIRING DIAGRAM

Starting And Charging Systems: Component Location:

COMPONENT LOCATION VIEW

Starting And Charging Systems: Component ID:

COMPONENT ID

1 Battery in the engine bay.
2 Generator at the rear of the engine on the right-hand side.
4 Starter motor on the left-hand side of the engine at the rear.
20 Ignition switch to the right of the steering column.
21 Ignition switch relay in main fuse box behind the glove box.
22a Fuse holder behind the access panel in the glove box/under the passenger airbag.
47 Main instrument display panel in the dashboard.
47e Charging warning lamp in the main instrument display panel.
75 Distribution block, battery positive, on the battery tray.
77 Starter interlock contacts (automatic transmission) in transmission range switch 239 beside the selector lever.
239 Transmission range switch beside the selector lever.
289 Anti-theft alarm control module on the right-hand side under the dashboard, behind the knee shield.
452 Starter relay, anti-theft alarm in main fuse box behind the glove box.

4-Pin Connector
H4-21 Beside the generator (V6).

10-Pin Connector
H10-1 Under the dashboard to the left of the heater housing.

70-Pin Connector
H70-1 In the engine bay, behind the bulkhead partition.

Grounding Points
G2 Grounding point, battery tray, on the left-hand wheel housing.
G6 Grounding point, negative distribution terminal, in main fuse box behind the glove box.
G8 Grounding point, dashboard, beside the left-hand loudspeaker socket.
G25 Gearbox grounding point.

DESCRIPTION OF OPERATION
Starting System
Current (+30 circuit) is supplied from battery 1 to ignition switch 20 and also direct to terminal 30 on starter motor 4.

When the ignition switch is turned to the Start position, current (+50 circuit) is supplied to the actuating coil of the solenoid. The actuating coil closes the start contact, allowing current from the battery to flow through the starter motor which then starts to rotate. On cars equipped with an anti-theft alarm, current (+50 circuit) is supplied to the control module for anti-theft alarm 289 and also to starter motor inter-lock relay 452.

Automatic Transmission
Cars with automatic transmission are equipped with starter motor interlock switch 77 which prevents the engine from being started when the selector lever is in position 1,2,3, D or R.

Charging System
The charging warning lamp informs the driver whether the generator is charging the battery or not.

When ignition switch 20 is in the Drive position, positive current (+15 circuit) is supplied via fuse 13 to charging warning lamp 47e in the main instrument display panel and then on to generator 2.

When the generator is not rotating or if it is not charging for some reason or other, the charging warning lamp circuit will be grounded through the generator and the warning lamp will light up.

When the generator is charging the battery, terminal D+ is supplied with the same current as B+.

The charging lamp will then be supplied with the same current on both terminals. The lamp will then go out.

IMPORTANT: Since the field excitation of the generator is built up through the incandescent bulb, the bulb rating (2W) must not be changed.

To increase field excitation additionally, a resistor is connected in parallel with the bulb. A diode, which blocks reverse currents, is connected in series with the charging warning lamp.

FAULT DIAGNOSIS HINTS
Starting System
1. Check the battery voltage on starter motor 4, terminal 30.
2. Check the operating current on the starter motor solenoid with the ignition switch in the Start position.
3. Check the terminal blocks and wiring harness.
4. Check that the engine is grounded to the car chassis.

Charging System
1. Check the battery voltage on generator 2.
2. Check that fuse 13 is intact and supplied with current.
3. Check that the charging lamp bulb is intact.
4. Check connectors and the wiring harness as well as the generator's ground connection.
5. Check that terminal D+ on the generator is supplied with current.
6. Start the engine and take a voltage reading across B+ on the generator and ground. Also take a voltage reading across D+ on the generator and ground.
The difference between the two readings should not exceed 0.7 V.