Chery Tiggo 5 (T21). Manual — part 381
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DTC Confirmation Procedure
Confirm that battery voltage is between 11 and 14 V before performing the following procedures.
Turn ignition switch to LOCK.
Connect X-431 3G diagnostic tester (the latest software) to Data Link Connector (DLC), and make it
communicate with vehicle electronic module by the data network.
Turn ignition switch to ON.
Using X-431 3G diagnostic tester to record and clear the DTCs stored in the TCU.
Turn ignition switch to LOCK and wait for a few seconds.
Turn ignition switch to ON, and then select "Read Code".
If DTC is detected, the malfunction indicated by the DTC is current. Go to the diagnosis procedure - Step 1.
If DTC is not detected, the malfunction indicated by the DTC is intermittent. Please refer to Intermittent
DTC Troubleshooting.
Diagnosis Procedure
a. Turn ignition switch to LOCK.
b. Loosen and retighten the ground bolt or nut.
c. Check the installation position of the ground connection.
a. Turn ignition switch to LOCK.
DTC
U0100
Lost communication With ECM authentication frame
DTC
U0073
Control Module communication Bus Off
DTC Code
DTC Definition
DTC Detection
Conditions
Possible Causes
U0100
Lost communication
With ECM
authentication frame
Ignition switch ON
Wire harness or connector
ECM
U0073
Control Module
communication Bus
Off
Ignition switch ON
CAN Line
CAUTION
If the ECM or immobilizer control module is replaced, match the system with the X-431 3G diagnostic
tester (
).
1
Check the ground connection
Repair or replace ground connection
NG
2
Check engine control module (ECM) connector
OK
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b. Disconnect the ECM connector E-033.
c. Check if the connector is damaged.
a. Turn ignition switch to LOCK.
b. Disconnect the immobilizer control module connector
I-018 and immobilizer coil connector.
c. Check if the connectors are damaged.
RT21380241
Repair or replace connector if necessary
NG
3
Check immobilizer control module connector and immobilizer coil connector
OK
RT21340100
Repair or replace connectors if necessary
NG
4
Replace ECM
OK
Repair or replace CAN BUS line
NG
System is operating normally
OK
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ON-VEHICLE SERVICE
Immobilizer Control Module
Removal & Installation
1. Turn off all the electrical devices and ignition switch.
2. Disconnect the negative battery cable.
3. Remove the right lower instrument panel protector (
).
4. Disconnect the connectors (arrow) and remove the fixing
bolt (1) of the immobilizer control module with a wrench.
(Tightening torque: 7 ± 1 N·m)
Installation is in the reverse order of removal.
1
RT21340101
CAUTION
Install the connectors in place.
Tighten the fixing bolt in place.
1
35
LIGHTING SYSTEM
Description 35-6
Specifications 35-6
Tools 35-7
Circuit Diagram
Intermittent DTC Troubleshooting
Removal 35-64
Inspection 35-65
Installation 35-66
Removal 35-67
Inspection 35-68
Installation 35-68
Removal 35-69
Installation 35-70
Adjustment 35-70
Rear Combination Light Assembly
Removal 35-74
Installation 35-75
Rear Combination Light Assembly
Removal 35-76
Installation 35-77
Removal 35-78
Installation 35-78
Removal 35-79
Installation 35-79
Removal 35-80
Inspection 35-81
Installation 35-81
Removal 35-82
Inspection 35-83
Installation 35-83
Removal 35-84
Installation 35-84
Removal 35-85
Installation 35-85
Removal 35-86
Installation 35-86
Removal 35-87
Installation 35-87
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