Mazda Mazda6 - Dtc (4 Wd); Obd Drive Mode

F1–52
ON-BOARD DIAGNOSTIC
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DTC (4WD)
A6E397018881204
• Detection logics and conditions are as shown below.
Controller Area Network (CAN)
PCM cannot receive any signals from TCM (U0101)
• PCM cannot receive any signals from TCM.
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OBD DRIVE MODE
A6E397018881205
• Performing the Drive Mode inspects the OBD system for proper operation. The Drive Mode must be performed
to ensure that no additional DTCs are present.
• During Drive Mode, the following systems are inspected:
— Oxygen sensor (HO2S)
— Oxygen sensor heater
— Catalytic converter (TWC)
Caution
• While performing the Drive Mode, always operate the vehicle in a safe and lawful manner.
• When the WDS or equivalent is used to observe monitor system condition while driving, be sure to
have another technician with you, or record the data in the WDS or equivalent using the PID/DATA
MONITOR AND RECORD function and inspect later.
Note
• Vehicle speed and engine speed detected by the PCM may differ from that indicated by the speedometer
and tachometer. Use the WDS or equivalent to monitor vehicle speed.
• If the OBD system inspection is not completed during the Drive Mode, the following causes are
considered:
1. The OBD system detects the malfunction.
2. The Drive Mode procedure is not completed correctly.
• Disconnecting the battery will reset the memory. Do not disconnect the battery during and after Drive
Mode.
PCM Adaptive Memory Procedure Drive Mode
Note
• The PCM adaptive memory condition can be confirmed with RFCFLAG PID.
• If RFCFLAG PID is “Learnt”, PCM Adaptive Memory Procedure Drive Mode is not necessary, because
PCM already has adaptive memory.
• If RFCFLAG PID is “Not Learnt”, PCM Adaptive Memory Procedure Drive should be performed before
HO2S Heater, HO2S, and TWC Repair Verification Drive Mode.
1. Start the engine and warm it up completely.
2. Verify all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
U0101 PCM cannot receive any signals from TCM ON 1 Other ×
U0121
PCM cannot receive any signals from ABS, ABS/TCS
or DSC HU/CM
ON 1 Other ×
U0155
PCM cannot receive any signals from instrument
cluster
ON 1 Other ×
DTC No. Condition MIL DC Monitor item
Memory
function