Geely Emgrand X7. Manual part — 346

ECM

BCM

IP

ACU

ABS

TCU

DLC

SL03-0040c

4. Diagnostic

procedures:

Note: Before carrying out this diagnosis step, observe the data list on fault diagnosis tester and analyze the
accuracy of the data, as these will help with quick diagnosis.

1

Read the fault code again after clearing away the fault code to check if fault codes, except DTC
U0100, U0121, U0146 and U0415 exist in the control system.

A. Connect fault diagnosis tester to the datalink connector.

B. Rotated ignition switch to ON position

C. Switch on fault diagnostic device power supply

D. Clear DTC code.

E. Reset reading fault code, and check if DTCs meet setting condition of fault code in current

DTC Codes Shown

To Step

DTC U0100 U0121 U0146 U0415

Yes

DTCs other than DTCs U0100, U0121, U0146 and U0415

No

1383

2

Detect TCU CAN bus circuit

See 11.17.7.6 diagnosis of CAN bus signal.

Whether the CAN bus is open circuited or short circuited?

3 ReplaceTCU

Refer to3.5.7.8 replace automatic transmission control module

4

Go to automatic transmission fresh process.

Refer to3.5.7.4 Automatic transmission refresh process

5

Use fault diagnosis tester to confirm if DTC is stored again.

A. Connect fault diagnosis tester to the data link connector.

B. Rotated ignition switches to ON position.

C. Clear DTC code.

D. Start and run the engine at idle speed to warm up the engine for at least 5min.

E. Read control system DTC code again to confirm that the system has no DTC code exported.

6 Troubleshooting

5. Maintenance

guide:

Replace Automatic transmission control module, refer to3.5.7.8 replace automatic transmission control module

No

Yes

Refer to3.4.7.6 fault diagnosis code (DTC) chapter
index

Next

Yes

No

Next

Refer to 2.2.7.3 Intermittent Fault Inspection for
intermittent fault.

Yes

No

Maintenance circuit fault

1384

3.5.7.29 U1601 U1606 U1607 U1608 U1609

1. DTC

description:

DTC U1601 TCU application software lost or damaged

DTC U1606 TCU calibration error–platform

DTC U1607 TCU calibration error-activate the derived calibration

DTC U1608 TCU VIN (vehicle identification number)-coding error

DTC U1609 TCU hardware (pcb) calibration error

The transmission control unit software or calibration software can be upgraded online. These DTC protection
transmission control units prevent the documents damaged from loading to the transmission control unit. They
further ensure only the correct calibration parameter and software version can be loaded into the current
transmission control unit (TCU) for use.

2. Conditions for setting DTC and the fault position :

DTC code

DTC detection

strategy

Conditions for setting the DTC (control

strategy)

Fault position s

U1601

U1606

U1607

1. ignition switch is in ON position

2. CRC is ineffective.

U1608

1. ignition switch is in ON position

2. VIN is not consist with rated concent

U1609

Hardware Circuit

Inspection

1. ignition switch is in ON position

2. TCU made messages are not exist

1. TCU

3. Diagnostic

Procedures:

Note: Before carrying out this diagnosis step, observe the data list on fault diagnosis tester and analyze the
accuracy of the data, as these will help with quick diagnosis.

1

Read the fault code again after clearing away the fault code to Check if fault codes, except DTC
U1601, U1606, U1607, U1608 and U1609 exist in the control system.

1385

A. Connect fault diagnosis tester to the datalink connector.

B. Rotated ignition switch to ON position

C. Switch on fault diagnostic device power supply

D. Clear DTC code.

E. Reset reading fault code, and check if DTCs meet setting condition of fault code in current

DTC Codes Shown

To Step

DTC U1601 U1606 U1607 U1608 U1609

Yes

DTCs other than DTCs U1601, U1606, U1607, U1608 and U1609

No

2

Update the TCU calibrated software.

3

Use fault diagnosis tester to confirm if DTC is stored again.

A. Connect fault diagnosis tester to the data link connector.

B. Rotated ignition switches to ON position.

C. Clear DTC code.

D. Start and run the engine at idle speed to warm up the engine for at least 5min.

E. Read control system DTC code again to confirm that the system has no DTC code exported.

3 ReplaceTCU

Refer to3.5.7.8 replace automatic transmission control module

4

Go to automatic transmission fresh process.

Refer to3.5.7.4 Automatic transmission refresh process

No

Yes

Refer to3.4.7.6 fault diagnosis code (DTC) chapter
index

Next

Next

No

Yes

Troubleshooting

1386