sensor CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine GENERAL INFORMATION
Description
This Antilock Brake System (ABS) uses components of the base brake system, but also features the following com-
ponents:
•Hydraulic Control Unit and Antilock Brake System Module (ABS module)
• Wheel Speed Sensors (wheel speed sensor) - Four sensors (one sensor at each wheel making it a four-chan-
nel system)
The purpose of the ABS is to prevent wheel lockup under braking conditions on virtually any type of road surface.
Antilock braking is desirable because a vehicle that is stopped without locking the wheels retains directional stability
and some steering capability. This allows the driver to retain greater control of the vehicle during braking.LTSM120040
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12–35Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Operation
ABS Braking
•ABS operation is available at all vehicle speeds above 20 km/h. If a wheel locking tendency is detected during
a brake application, the brake system enters the ABS mode. During ABS braking, hydraulic pressure in the four
wheel circuits is modulated to prevent any wheel from locking. Each wheel circuit is designed with a set of
electric solenoids to allow modulation. The system can build and release pressure at each wheel, depending on
signals generated by the wheel speed sensors at each wheel and received at the ABS Module.
• There are a few performance characteristics of the ABS that may at first seem abnormal, but in fact are nor-
mal. These characteristics are described below.
If the electrical system malfunctions, the Fail-Safe function is activated, the ABS becomes inoperative and
the ABS warning lamp turns on.
During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is normal.
Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel, or snow-covered (fresh, deep snow) roads.
Specifications
Torque Specifications
DESCRIPTION TORQUE (N·m)
ABS Mounting Bolt (To Bracket) 10
ABS Mounting Bracket Screws (To Frame) 20
ABS Mounting Bracket Screw And Nut (To Frame) 20
ABS Wheel Speed Sensor Head Mounting Screw - Rear 10
Brake Tube Nuts 10
Wheel Mounting Nuts 110
GENERAL INFORMATION
12–36Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Antilock Brake System (ABS) Module Connector Pin-Out Table
ABS Hydraulic Control Module Connector Pin-Out Table
PINCIRCUIT IDENTIFICATION PINCIRCUIT IDENTIFICATION
1 Front Wheel Speed Sensor LH + 14-
2 Front Wheel Speed Sensor LH - 15Decelerator Sensor (GND)
3 -16ABS Lamp
4 Ignition Switch 17-
5 Rear Wheel Speed Sensor LH + 18Brake Switch
6 Rear Wheel Speed Sensor LH - 19Front Wheel Speed Sensor RH +
7 Diagnostic Link K 20Front Wheel Speed Sensor RH -
8 GND (Power) 21-
9 Continuous Supply Voltage (Motor) 22 Rear Wheel Speed Sensor RH +
10 -23Rear Wheel Speed Sensor RH -
11 -24GND (Motor)
12 -25Continuous Supply Voltage
13 Decelerator Sensor (G) --
GENERAL INFORMATION
12–44Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Diagnostic Help
Diagnostic Help
1. The X-431 scan tool connects to the Data Link Connector (DLC) and communicates with the vehicle electronicmodules through the vehicle data circuits.
2. Confirm that the malfunction is current and carry-out the diagnostic tests and repair procedures.
3. If the Diagnostic Trouble Code (DTC) cannot be deleted, it is a current fault.
4. Use a digital multimeter to perform voltage readings on electronic systems.
5. Refer to any Technical Bulletins that may apply to the failure.
6. Visually inspect the related electrical wiring harness.
7. Perform a voltage drop test on the related circuits between the suspected component and the ABS module.
8. Inspect and clean all ECM, ABS, engine, and chassis grounds that are related to the most current DTC.
9. If numerous trouble codes were set, use an electrical schematic and look for any common ground circuits or voltage supply circuits that may apply to the DTC.
10. For any wheel speed sensor DTCs, inspect for dirt/metal debris.
11. Use the scan tool to perform a System Test if one applies to the failed component.
Intermittent DTC Troubleshooting
If the failure is intermittent perform the following:
• Check for loose connectors.
• Look for any chafed, pierced, pinched, or partially broken wires.
• Monitor the scan tool data relative to this circuit.
• Wiggle the related electrical wiring harness and connectors while looking for an interrupted signal on the
affected circuit.
• If possible, try to duplicate the conditions under which the DTC set.
• Look for the data to change or for the DTC to reset during the wiggle test.
• Look for broken, bent, pushed out or corroded terminals.
• Inspect the sensor and mounting area for any condition that would result in an incorrect signal, such as dam-
age, foreign material.
• A data recorder, and/or oscilloscope should be used to help diagnose intermittent conditions.
• Remove the ABS module from the troubled vehicle and install in a new vehicle and test. If the DTC cannot be
deleted, the ABS module is malfunctioning. If the DTC can be deleted, return the ABS module to the original
vehicle.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground connec-
tions are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can become an unwanted
resistance. This added resistance can affect the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drastically
affect an electronically controlled circuit. A poor or corroded ground can affect the circuit. Perform the following when
inspecting a ground connection:
1. Remove the ground bolt or screw.
2. Inspect all mating surface for tarnish, dirt, rust, etc.
3. Clean as required to assure good contact.
4. Reinstall bolt or screw securely.
5. Inspect for add-onaccessories which may be interfering with the ground circuit.
6. If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the wires are clean, securely fastened and providing a good ground path. If multiple wires are crimped to one eyelet, make
sure no excess wire insulation has been crimped creating a bad ground.
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12–45Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Tools
•Diagnostic Scan Tool X-431
• Digital Multimeter
• Jumper Wire
Diagnostic Trouble Code (DTC) List
Antilock Brake System DTC List
DTC DTC DEFINITION
C1101 Battery Voltage High (>18 Volt)
C1102 Battery Voltage Low (<18 Volt)
C1200 Left Front Wheel Speed Sensor Circuit Open or Short to Ground
C1201 Range/Performance: Speed Jump Or Damaged Exciter
C1202 No Signal: Air-Gap Error Or Wrong Exciter
C1203 Right Front Wheel Speed Sensor Circuit Open or Short to Ground
C1204 Range/Performance: Speed Jump Or Damaged Exciter
C1205 No Signal: Air-Gap Error Or Wrong Exciter
C1206 Left Rear Wheel Speed Sensor Circuit Open or Short to Ground
C1207 Range/Performance: Speed Jump Or Damaged Exciter
C1208 No Signal: Air-Gap Error Or Wrong Exciter
C1209 Right Rear Wheel Speed Sensor Circuit Open or Short to Ground
C1210 Range/Performance: Speed Jump Or Damaged Exciter
C1211 No Signal: Air-Gap Error Or Wrong Exciter
C1275 G Sensor Open Or Short To Ground
C1274 G Sensor Signal Fixed Signal
C1604 ECU Hardware: ECU Internal Or Valve Failure
C2112 Valve Relay: Valve Relay Or Fuse Failure
C2402 Motor - Electrical: Open Or Short To Battery, Motor Relay, Fuse Or Motor Lock Fail
DIAGNOSIS & TESTING
12–46Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine C1200 - Left Front Wheel Speed Sensor Circuit Open or Shorted
DIAGNOSIS & TESTING
LTSMW120012T
12–54Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine On Board Diagnostic Logic
•Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
C1200 Left front wheel
speed sensor circuit open or shorted •
Ignition switch:
ON
• Vehicle: Running ABS module
detected that the
Left Front wheel
speed sensor input
signal to ABS
module is open or
shorted. •
Left Front wheel
speed sensor
• Harness is open or
shorted
• ABS module
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Turn ignition switch off.
• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.
• Turn ignition switch on.
• With the scan tool, record and erase stored DTCs in the ABS module.
• Cycle the ignition switch from off to on.
• Start the engine and warm it to normal operating temperature.
• Turn ignition switch off and wait for a few seconds.
• Start the engine. With the scan tool connected to the DLC, drive the vehicle over 40 km/h (25 mph).
NOTE :
Vehicle must be driven above 40 km/h (25 mph) for fault setting conditions to be met.
• With the scan tool select: View ABS Data Stream and DTC.
• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-
bleshooting in Section 12 Brakes for more information).
• Erase all codes and test drive the vehicle to verify the repair is complete.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Diagnostic Procedure
1.CHECK ABS MODULE DTC
• With the scan tool select: View ABS Data Stream.
• With an assistant driving the vehicle, check the following data stream list items while driving the vehicle over 40
km/h (25 mph).
Left Front Wheel Speed
Right Front Wheel Speed
Left Rear Wheel Speed
Right Rear Wheel Speed
• With the scan tool, read active DTCs in the ABS module.
Is DTC C1200 present and the Left Front Wheel Speed signal abnormal?
Ye s>>Go to the next step.
No
>>The condition that caused this DTC to set is currently not present (See Diagnostic Help and Intermit-
tent DTC Troubleshooting in Section 12 Brakes for more information).
DIAGNOSIS & TESTING
12–56Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.CHECK LEFT FRONT WHEEL SPEED SENSOR ELECTRICAL CONNECTOR
• Turn ignition switch off.
• Disconnect the wheel speed sensor (1) electrical
connector.
• Inspect the wheel speed sensor electrical connector
for damage.
Is the electrical connector OK?
Ye s>>Go to the next step.
No
>>Repair or replace the electrical connector
as necessary.
3.CHECK LEFT FRONT WHEEL SPEED SENSOR REFERENCE SIGNAL CIRCUIT
• Turn ignition switch on.
• Measure the sensor reference voltage between ter-
minal 2 of the wheel speed sensor connector, ter-
minal side and ground.
• Voltage should exist (2.0 - 4.0 V).
Is the proper voltage present?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for an open,
short to ground or short to battery in connector or
harness.
4.CHECK LEFT FRONT WHEEL SPEED SENSOR RESISTANCE
• Check the wheel speed sensor resistance between
the sensor terminals 1 and 2, component side.
Is the sensor resistance 700 - 1500 ohms?
Ye s>>Go to the next step.
No
>>Replace the Left Front wheel speed
sensor.
DIAGNOSIS & TESTING
PZSMD120001
LTSMD120003
VISMD120005
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12–57Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK LEFT FRONT WHEEL SPEED SENSOR GROUND CIRCUIT FOR AN OPEN
• Turn ignition switch off.
• Disconnect the ABS module electrical connector.
• For 1.6L/1.8L engine: Check the continuity between
terminal 2 of the ABS module connector E-002, and
terminal 1 of the Left Front wheel speed sensor
connector E-028, terminal side.
• For 2.0L/2.4L engine: Check the continuity between
terminal 2 of the ABS module connector A-020, and
terminal 1 of the Left Front wheel speed sensor
connector B-021, terminal side.
• Continuity should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for an open.
6.CHECK LEFT FRONT WHEEL SPEED SENSOR GROUND CIRCUIT FOR A SHORT TO GROUND
• Check the continuity between terminal 1 of the Left Front wheel speed sensor connector, terminal side and
ground.
• Continuity should not exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for a short to ground.
7.CHECK LEFT FRONT WHEEL SPEED SENSOR GROUND CIRCUIT FOR A SHORT TO VOLTAGE
• Check the voltage between terminal 1 of the Left Front wheel speed sensor connector, terminal side and
ground.
• Voltage should not exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for a short to battery.
8.CHECK DTC
• With the X-431 scan tool, read the ABS module DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC C1200 present?
Ye s>>Replace the ABS module (See ABS Module Removal & Installation in Section 12 Brakes).
No
>>The system is now operating properly.
Erase all codes and test drive the vehicle to verify the repair is complete.
DIAGNOSIS & TESTING
LTSMD120004
12–58Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine C1203 - Right Front Wheel Speed Sensor Circuit Open or Shorted
DIAGNOSIS & TESTING
LTSMW120013T
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12–59Chery Automobile Co., Ltd.