Toyota Corolla Cross: Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
(a) The transponder key ECU assembly controls the immobiliser system. Immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3).
CHECK DLC3
(a) Check the DLC3.
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INSPECT AUXILIARY BATTERY VOLTAGE
(a) Measure the auxiliary battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery.
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DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a
DIAGNOSTIC TROUBLE CODE CHART Immobiliser System (w/o Smart Key System)
DTC No. Detection Item
Link B2780
Push Switch / Key Unlock Warning Switch Malfunction
B2
DESCRIPTION This DTC is stored if the transponder key ECU assembly does not detect that the unlock warning switch assembly is on even when the ignition switch is ON.
DTC No. Detection Item
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DESCRIPTION The air conditioning harness assembly connects the air conditioning amplifier assembly and the No. 1 air conditioning radiator damper servo sub-assembly.
The No. 1 air conditioning radiator damper servo sub-assembly sends damper position information to the air conditioning amplifier as
DESCRIPTION The cause of the malfunction may be the cooling system.
Check whether the grille is blocked, whether coolant is leaking, the radiator fan operating condition and whether coolant has frozen. Related Parts Check
Area Inspection
Grille blockage, coolant amount, coolant
