Chery Tiggo. Manual — part 385

DIAGNOSIS & TESTING

Diagnostic Help

1. The X-431 scan tool connects to the Data Link Connector (DLC) and communicates with the vehicle electronic

modules through the data network.

2. Confirm that the malfunction is current and carry-out the diagnostic tests and repair procedures.

3. If the 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 wiring harness.

7. Inspect and clean all Restraints Control Module (RCM) grounds that are related to DTC.

8. If numerous trouble codes were set, use a wiring schematic and look for any common ground circuits or voltage

supply circuits that may apply to the DTC.

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 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 Restraints Control Module (RCM) from the troubled vehicle and install in a new vehicle and test. If

the DTC cannot be deleted, the RCM is malfunctioning. If the DTC can be deleted, return the RCM to the origi-
nal 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 alter 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-on⬙ accessories 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.

Diagnostic Tools

Diagnostic Scan Tool X-431

Read the following when connecting the X-431 scan tool:

• Connect the scan tool to the Data Link Connector (DLC) for communication with the vehicle.

• The DLC is located on the driver side compartment under the steering column (it is attached to the instrument

panel and accessible from the driver seat).

• The DLC is rectangular in design and capable of accommodating up to 16 terminals.

• The electrical connector has keying features to allow easy connection.

Airbag Special Load Tool

Use the airbag special load tools to diagnose airbag system faults:

• The airbag special load tools simulates airbag system components.

NOTE :
Using the airbag special load tools will help prevent other airbag DTCs from being set while troubleshooting the
system.

Digital Multimeter

Read the following when using the digital multimeter:

• Troubleshoot electrical problems and wiring systems.

• Use a multimeter for basic fault finding and bench testing.

• Use a multimeter to measure voltage, current and resistance.

Diagnostic Trouble Code (DTC) List

Restraints Control Module DTC List

DTC

DTC DEFINITION

B1101

Battery Voltage High

B1102

Battery Voltage Low

B1345

Driver Airbag Open

B1346

Driver Airbag Resistance Too High (1st Stage)

B1347

Driver Airbag Resistance Too Low (1st Stage)

B1348

Driver Airbag Resistance Circuit Short To Ground (1st Stage)

B1349

Driver Airbag Resistance Circuit Short To Battery (1st Stage)

B1351

Passenger Airbag Open

B1352

Passenger Airbag Resistance Too High (1st Stage)

B1353

Passenger Airbag Resistance Too Low (1st Stage)

B1354

Passenger Airbag Resistance Circuit Short To Ground (1st Stage)

B1355

Passenger Airbag Resistance Circuit Short To Battery (1st Stage)

B1360

Pretensioner Front-Driver Open

B1361

Pretensioner Front-Driver Resistance Too High

B1362

Pretensioner Front-Driver Resistance Too Low

B1363

Pretensioner Front-Driver Resistance Circuit Short To Ground

B1364

Pretensioner Front-Driver Resistance Circuit Short To Battery

B1366

Pretensioner Front-Passenger Open

B1367

Pretensioner Front-Passenger Resistance Too High

B1368

Pretensioner Front-Passenger Resistance Too Low

B1369

Pretensioner Front-Passenger Resistance Circuit Short To Ground

B1370

Pretensioner Front-Passenger Resistance Circuit Short To Battery

B1406

PPD Front-Passenger Defect

B1407

PPD Front-Passenger Communication Error

B1462

Front PPD Open

B1511

Buckle Switch Driver Open Or Short To Battery

B1512

Buckle Switch Driver Short Or Short To Ground

B1513

Buckle Switch Passenger Open Or Short To Battery

B1514

Buckle Switch Passenger Short Or Short To Ground

DIAGNOSIS & TESTING

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DTC

DTC DEFINITION

B1515

Buckle Switch Driver Defect

B1516

Buckle Switch Passenger Defect

B1527

Passenger Airbag Deactivation Switch Open Or Short To Battery

B1528

Passenger Airbag Deactivation Switch Short Or Short To Ground

B1529

Passenger Airbag Deactivation Switch Defect

B1650

Crash Record In 1st Stage Only (Frontal - Replace ECU)

B1657

Crash Record In Belt Pretensioner Only

B1658

Belt Pretensioner 6 Times Deployment

B1620

Internal Fault - Replace ECU

B2501

Warning Lamp Fault - Open

B2503

Warning Lamp Fault - Short To Ground

B2504

Warning Lamp Fault - Short To Battery

B2505

Passenger Airbag Off Warning Lamp Failure

DIAGNOSIS & TESTING

Diagnostic Trouble Code (DTC) Tests

B1102 - Battery Voltage Low

DIAGNOSIS & TESTING

LTSMW140002T

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