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Mazda CX 7. Manual - part 133

CHARGING SYSTEM [L3 WITH TC]

01-17–3

01-17

Battery Voltage

1. Inspect the battery as follows:

Battery load test current

55D23L (48): 180 A
80D26L (55): 195 A

Standard specification

Back-up Current

1. Verify that the ignition switch is off (key has been removed) and that all doors are closed.
2. Disconnect the negative battery cable.
3. Connect the tester between the negative battery terminal and negative battery cable, leave the battery

undisturbed for 30 min, and then measure the back-up current.

• If not within the specification, measure the back-up current while removing the fuses one by one from the

inside of the main fuse block and the inside of the fuse block.

Note

• If the battery is not left undisturbed for 30 min, the tester will indicate a high value (approx. 300 mA).

• If the key or any electrical accessory is operated within approx. 30 min after the tester is connected, the

battery must be left undisturbed for approx. 30 min from that point.

Caution

• Operating electrical loads while the back-up current is being measured can damage the tester.

Note

• For vehicles with the immobilizer system, the system periodically shifts synchronization of the security

light flashing. Therefore, 65 mA (0.1 s) current is supplied when the security light is illuminated, and 55
mA (2 s) current is supplied when the security light is not illuminated. In addition, the measuring
instrument, which shows the average value, indicates around 60 mA.

Battery back-up current

Vehicles with immobilizer system: 55— 65 mA
Vehicles without immobilizer system: 60 mA or less

4. Inspect and repair wiring harnesses and connectors of the fuse where the current has decreased.

End Of Sie

Step

Inspection

Action

Measure the battery
positive voltage.

12.4 V or

Go to Step
3.

Less

than

12.4 V

Go to the
next step.

Quick charge for 30
min and recheck
voltage.

12.4 V or

Go to the
next step.

Less

than

12.4 V

Replace the
battery.

Using the battery load
tester, apply load
current (see battery
load test current) and
record battery voltage
after 15 s. Is voltage
more than the
specification?

Yes

Normal

Replace the
battery.

Battery temp. (

°C {°F})

Minimum voltage (V)

4 {39}

9.3

10 {50}

9.4

16 {61}

9.5

21 {70}

9.6

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CHARGING SYSTEM [L3 WITH TC]

01-17–4

BATTERY RECHARGING[L3 WITH TC]

id011739800700

Warning

• Keep all flames away from the battery, otherwise evaporated gas from the battery fluid may catch

fire, and cause serious injury.

• Remove the battery filler caps when recharging to prevent battery deformation or damage.

Caution

• Do not quick charge for more than 30 min. It will damage the battery.

1. Remove the battery and then place it in a pan of

water.

2. Connect a battery charger to the battery and

adjust the charging current as follows.

Battery slow charge current

55D23L (48): 4.5— 5.5 A
80D26L (55): 5.5— 6.5 A

Battery quick charge current [30 min]

55D23L (48): 30 A
80D26L (55): 35 A

3. After the battery is recharged, verify that the

voltage is within the specification and remains at the same value for 1 h or more after the recharging has been
completed.

• If not within the specification, replace the battery.

Standard voltage

12.4 V or more

End Of Sie

WM: GENERATOR

GENERATOR REMOVAL/INSTALLATION[L3 WITH TC]

id011739800200

Warning

• Remove and install all parts when the engine is cold, otherwise they can cause severe burns or

serious injury.

• When the battery cables are connected, touching the vehicle body with generator terminal B will

generate sparks. This can cause personal injury, fire, and damage to the electrical components.
Always disconnect the negative battery cable before performing the following operation.

Caution

• The generator can be damaged by the heat from the exhaust manifold. Make sure the generator

duct is installed securely.

1. Disconnect the negative battery cable.
2. Remove the charge air cooler duct and charge air cooler cover. (See 01-13-5 INTAKE AIR SYSTEM

REMOVAL/INSTALLATION[L3 WITH TC].)

3. Remove the front splash shield (RH).
4. Remove the drive belt. (See 01-10-3 DRIVE BELT REMOVAL/INSTALLATION[L3 WITH TC].)
5. Remove in the order indicated in the table.
6. Install in the reverse order of removal.

BATTERY

BATTERY
CHARGER

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CHARGING SYSTEM [L3 WITH TC]

01-17–5

01-17

Generator Removal Note

1. Remove the cooler hose bracket nut and set the

cooler hose out of the way before performing the
generator removal/installation.

2. Remove the generator from above the engine

compartment.

Generator Installation Note

1. Tighten bolt A temporarily.
2. Tighten bolt B, C to the specified tightening torque.
3. Tighten bolt A to the specified tightening torque.

End Of Sie

38—51
{3.9—5.2,
29—37}

38—51 {3.9—5.2, 29—37}

N·m {kgf·m, ft·lbf}

9.8—14.7 N·m
{100—149 kgf·cm,
87—130 in·lbf}

7.8—10.8 N·m
{79.6—110.1 kgf·cm,
69.1—95.5 in·lbf}

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Generator duct

Wiring harness bracket

Terminal B cable

Generator connector

Generator
(See 01-17-5 Generator Removal Note.)
(See 01-17-5 Generator Installation Note.)

COOLER HOSE

N·m {kgf·cm, in·lbf}

6.9—9.8
{71—99,
62—85}

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CHARGING SYSTEM [L3 WITH TC]

01-17–6

GENERATOR INSPECTION[L3 WITH TC]

id011739800300

Caution

• Do not apply direct battery positive voltage to generator terminal D, otherwise it could cause

damage to the internal parts (power transistor) of the generator.

Generator Warning Light

1. Verify that the battery is fully charged.
2. Verify that the drive belt deflection/tension is correct. (See 01-10-3 DRIVE BELT INSPECTION[L3 WITH TC].)
3. With the ignition switch turned to the ON position, verify that the generator warning light illuminates.

• If it does not illuminate, inspect the generator warning light and the wiring harness.

— If the generator warning light and the wiring harness are normal, inspect the PCM.

4. Verify that the generator warning light goes out after the engine is started.

• If it does not go out, inspect if any one of the following DTCs in the on-board diagnostic system are

displayed: P0112, P0113, P2502, P2503, P2504. (See 01-02-13 DTC TABLE[L3 WITH TC].)

Generator
Voltage

1. Verify that the battery is fully charged.
2. Verify that the drive belt deflection/tension is correct. (See 01-10-3 DRIVE BELT INSPECTION[L3 WITH TC].)
3. Turn off all electrical loads.
4. Start the engine.
5. Verify that the generator rotates smoothly without any noise while the engine is running.

• If there is any noise, find the cause and repair or replace the generator.

6. Measure the voltage at each terminal using a

tester.

• If it is not as specified, find the cause and

repair or replace the applicable part.

Generator standard voltage [IG-ON]

Terminal B: B+
Terminal P: Approx. 1 V or less
Terminal D: Approx. 0 V

Generator standard voltage [Idle, 20

°C {68

°F}]

Terminal B: 13— 15 V
Terminal P: Approx. 3— 8 V
Terminal D: Turn the electrical loads (headlights, blower motor, rear window defroster) on and verify

that the voltage reading increases.

Current

Note

• Since the charging current decreases rapidly after starting the engine, carry out the following procedure

quickly, and read the maximum current value.

1. Verify that the battery is fully charged.
2. Verify that the drive belt deflection/tension is correct. (See 01-10-3 DRIVE BELT INSPECTION[L3 WITH TC].)
3. Disconnect the negative battery cable.
4. Connect a tester, which can read 120 A or more, between generator terminal B and the wiring harness.
5. Connect the negative battery cable.
6. Turn off all electrical loads.
7. Start the engine.
8. Increase engine speed to 2,500 rpm.

Note

• When the electrical load on the vehicle is low, the specified current cannot be verified although the

generator is normal. In this case, increase the electrical load (Leave the headlights turned on for a while,
then discharge the battery, or use a similar method.) and recheck.

• When the generator itself or the ambient temperature are too high, the specified current also cannot be

verified. In this case, cool down the generator and recheck.

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Content .. 131 132 133 134 ..