Geely Emgrand X7. Manual part — 156

2.10.7.5 Replacement of Knock Sensor

Dismantlement Procedure

Warning: Refer to Warning on
Battery Disconnection in Warnings
and Precautions.

1. Disconnect the battery negative

electrode cable. Refer to 2.12.6.1
Battery Negative Cable
Disconnection/Connection
Procedures.

2. Refer to "2.12.6.4 Replacement

of Starter" to dismantle the starter
assembly.

3. Disconnect the knock sensor

harness connector.

4. Dismantle the fixing bolts of

knock sensor and knock sensor.

FE02-0404b

Installation Procedure:

1. Install the fixing bolts of knock

sensor.

Torque:18N . m(Metric) 13 .
3lb-ft(English system)

2. Connect the knock sensor

harness connector.

3. Install the starter assembly.

4. Connect battery negative cable.

FE02-0405b

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2.11 Start Charging System

2.11.1 Specifications

2.11.1.1 Fastener specifications

Torque

Fastener Name

Specification

Metric (N.m)

English system
(lb-ft)

Battery cable nut

M6

10-14

7.4-10.3

Generator Bolt

M10×1 . 25×72

49±9

36.1±6.6

Generator Pivot Nut

M24

44±10

32.5±7.4

2.11.1.2 General Specifications

Battery Specification

Applications Descriptions

Cold start current

660A

Minimum capability

145 min

Rated Voltage

12V

Starter Motor Specification

Applications Descriptions

Starter

No-Load Test (12.2 V )

40-90 A

No-Load Test Power Consumption

0.5 KW

Drive Gear Speed

2,600-4,800 rpm

Solenoid

Keep the Coil (12.2V)

35 A

Draw the Coil (12.2V)

35 A

Generator Specifications

Applications Descriptions

624

Current 90

A

Model JFZ1906

625

2.11.2 Description and operation

2.11.2.1 Battery Description and Operation

Warning: Refer to "Explosive Gas Generated by Battery" in "Warning and Precautions".

Warning

This vehicle uses a maintenance-free battery, which is different from a conventional battery. There
is no vent plug in this battery. Apart from a small vent on both sides of batteries, the battery is
completely sealed. Vent holes can discharge a small amount of gas generated by the battery. The
electrolyte inside the battery generates a small amount of gas after chemical reactions. If there is
no exhaust vent, battery internal pressure increases as the gas pressure increases. When the
pressure is over limit that the battery shell can withstand, the battery shell will break.

Compared with a conventional battery, this battery has the following advantages:

–

No need to fill water during the life of the battery.

– Overcharge

protection.

–

Electricity leakage is less likely to happen as compared with a conventional battery.

–

Lighter, smaller and capacity is larger.

In the entire electrical system, battery has main functions:

–

Provide energy to the starter for starting the vehicle.

–

Play a role as the electrical system voltage regulator.

– When the generator electrical system capacity can not meet the demand, the battery can

provide power in a certain period of time.

Explanation of battery technical parameters:

1. Capability: Indicating the minimum time for the battery to provide the vehicle load working

when the charging system is inactivated at night or atrocious weather. Namely, the battery
discharging at 25 A under 27 (80.6

℃

°F) until the final voltage of 10.5 V lasts 145 min.

2. Cold-start current: Indicating the startup current that the battery is able to provide under low

temperature. The battery with 660 A current can discharge over 30 s at the voltage above 7.2
V under the ambient temperature of -18 (

℃

-0.4 °F). If the battery test is normal, but the

battery voltage often appears inadequate, the vehicle can not start at night etc., consider the
reasons from the following aspects:

–

Electrical equipment in the vehicle remain turned on all night.

–

Driving speed is low, stop and start frequently.

–

Electric load of vehicle exceeds output of generator, especially when the vehicle is equipped
with after-sales optional device.

– Charging system fault, such as electrical short circuit, generators belt slipping, generator

malfunction or voltage regulator malfunction.

–

Improper use of the battery, including failing to maintain battery cable terminals clean and
tighten, or the battery bracket is loose.

–

Mechanical failure in the electrical system, such as short circuit or circuit damage.

2.11.2.2 Start System Description and Operation

Start system includes the battery, ignition switch, starter, start relay and related circuits, and all of
these components are connected by circuits. When the ignition switch is turned to "ST" position,

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