Toyota Corolla Cross: Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS
HINT:
Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the GTS when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.
- Clear the DTCs.
- Change the ECM from normal mode to check mode using the GTS.
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- Perform a simulation test.
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- Check and wiggle the harness(es), connector(s) and terminal(s).
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CAUTION / NOTICE / HINT When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out for all circuits considered to be possible causes of the problem. In many cases, by
REGISTRATION CAUTION / NOTICE / HINT PROCEDURE
1. VIN (VEHICLE IDENTIFICATION NUMBER) NOTICE: The Vehicle Identification Number (VIN) must be written to a replacement ECM.
HINT: The VIN is a 17-di
INITIALIZATION Inspection After Repair Perform Learning Value Reset and Idle Learning after replacing or servicing parts related to engine operation. Details on procedures required are indicated by an
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DESCRIPTION
This DTC is stored when an internal circuit malfunction is detected
by the DCM (telematics transceiver) self check.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
B15A804
DCM System Internal Failure
DESCRIPTION These DTCs are stored when the CAN communication system is malfunctioning.
DTC No. Detection Item
DTC Detection Condition Trouble Area
Memory U010087
Lost Communication with ECM/PCM "A" Missing Message
Diagnosis Condition:
IG voltage 8.5 V or
