Generators & Regulators: Other BMW Z3 E36 facelift

BATTERY DISCONNECT PROCEDURE

Note. If ignition is not turned off when battery is disconnected, fault memories may be set in some control units.

Disconnecting Battery

1. Turn ignition off. DO NOT disconnect battery leads and leads from generator and starter motor while engine is running.
2. There is a danger of mixing up battery leads. If battery positive and negative leads are the same color, follow the polarity to the battery. Then mark and cover leads.
3. On vehicles with radio code, radio code must be re-entered after connecting battery. Obtain radio code card from customer. Make a note of stored stations. Stored setting of on-board computer and clock will be lost.
4. Detach terminal of battery negative lead from car battery and secondary battery, if fitted. DO NOT pull lever off pole shoes by force. DO NOT remove socket-head cap screw of IBS. Cover battery negative terminals and secure.

Connecting Battery

1. When connecting battery, ignition must be off. No one must be in the car when battery is connected. AIRBAG module may activate when power is connected.
2. All available central keys must be coded for cars with first generation infrared transmitter locking systems.
3. If equipped, use radio code to enable radio. Reset radio station presets.
4. To set clock, time must be showing in instrument cluster display. Turn ignition on. To set ahead, turn button on right of tachometer to right. To set back, turn button to left. Adjustment speed will increase the longer the button is held. Pressing button will alternate setting from 12 hour to 24 hour mode.
5. On board computer settings will begin from zero.
6. Driveability problems may exist until computer systems have completed a relearn cycle. Vehicle may have to be driven for a few minutes before engine runs normally.
7. On vehicles equipped with sun roof, recalibration of sun roof may be necessary. There is no anti-trapping protection during recalibration. Perform the following procedure: Press and hold sun roof switch in lift direction. In case of delayed starting or sudden stopping of sun roof, continue pressing switch in lift direction until roof reaches lift position. After reaching full lift position, hold switch in position for at least 20 seconds more. Calibration is completed when sun roof in lift position bounces slightly in lift direction. Release switch for no more than 5 seconds. Hold down switch in raising position direction until sun roof has returned to closed position after a complete opening movement. Release switch. Carry out function check (one-touch function, anti-trapping protection and, if necessary, comfort function).

Bosch

1. Place DVOM on lowest scale. Measure resistance between 2 of the 3 sets of wires. Move one DVOM lead to the other set of wires. Check resistance between the remaining set of wires. Resistance values must be identical. If resistance is incorrect, stator has open or shorted windings and must be replaced.
2. Place DVOM on x1000 scale. Connect DVOM between stator core and each stator lead. Continuity should not exist. If continuity exists, stator is grounded and must be replaced.

Motorola

Connect DVOM between stator core and each stator lead. Continuity should not exist. If continuity exists, stator is grounded and must be replaced.

1. Place DVOM on lowest scale. Connect DVOM across slip rings. Ensure resistance is within specification. See «ROTOR RESISTANCE»(ref-2918-S37184752212000041400000) table.
2. If resistance is too low, rotor has short circuit and must be replaced. If resistance is infinite (no continuity), rotor has an open circuit and must be replaced.
3. Place DVOM on x1000 scale. Connect DVOM between rotor core and either slip ring. Continuity should not exist. If continuity exists, rotor is grounded and must be replaced.
4. Measure slip rings for wear and eccentricity. If wear is visible, turn rotor on lathe and polish slip rings. Maximum runout for slip rings is 0.11" (0.03 mm).

ROTOR RESISTANCE

Place DVOM on lowest scale. Connect DVOM across slip rings. Ensure resistance is within specification. See ROTOR RESISTANCE table. If resistance is too low, rotor has short circuit and must be replaced. If resistance is infinite (no continuity), rotor has open circuit and must be replaced. Measure slip rings for wear and eccentricity. If wear is visible, turn rotor on lathe and polish slip rings. Maximum runout for slip rings is 0.11" (0.03 mm).

GENERATOR (NON-WATER COOLED - V12)

Note. Numbers in text refer to numbers in figures.

GENERATOR (WATER COOLED - V12)

Note. Numbers in text refer to numbers in figures.

Scheme 29

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

Scheme 35

Scheme 36

Scheme 37

Scheme 38

Scheme 39

1. Disconnect battery. See «BATTERY DISCONNECT PROCEDURE»(ref-2918-S12253282762004100400000) under TROUBLE SHOOTING. Remove complete left intake filter housing by first pressing interlock (2) and cutting through plug connection (1). see scheme 6
2. Loosen retainers (1). Unfasten hose clip (2). Disconnect electrical connection (3). Unfasten hose clip (4). Remove hose. Remove upper section of intake filter housing. see scheme 7 Unfasten bolt. Remove lower section of suction filter housing. see scheme 8
3. Prepare radiator for removal by first draining coolant. Remove fan cowl. Unfasten electrical plug connection on temperature switch. (Scheme 29) Remove upper coolant hose by loosening clamp or, on coolant hoses with quick-release couplings, lift out spring (1). Disconnect coolant hose (2). (Scheme 30)or (Scheme 31).
4. Remove left and right screws (3) on radiator. Remove both brackets (4). Remove lower coolant hose by loosening clamp or, on coolant hoses with quick-release couplings, disconnect plug (1) and lift out spring (2). (Scheme 32)(Scheme 33). Disconnect coolant hose (3). Unfasten left and right radiator mounts by pressing in detent with screwdriver. (Scheme 34) Pull out radiator toward top. (Scheme 35)
5. Detach coolant hose (1) from water pump. Remove screw (2). (Scheme 36) Detach coolant hose (1) from outer jacket for generator. (Scheme 37) Detach plug (1) from generator. Release nut (2). Disconnect battery positive lead from generator (3). (Scheme 38) Remove generator drive belt.
6. Remove screw (1) completely on completion only. Remove screws on generator. Remove screw (1) half-way. Pull out generator a little and allow coolant to drain off. Remove screw (1) completely. (Scheme 39) Pull generator completely out of outer jacket and removed toward top.