Mazda RX-8 2004 - Page 177

ON-BOARD DIAGNOSTIC
02–02–2
Revised 11/2004 (Ref. No. R086/04)
2004 Mazda RX-8 Service Highlights (3378–1U–03C)
ON-BOARD DIAGNOSTIC SYSTEM FUNCTION (TIRE PRESSURE MONITORING SYSTEM)
CHU020237020S02
Malfunction Detection Function
• The malfunction detection function detects malfunctions in the input/output signal system of the tire pressure
monitoring system (TPMS) control module based on abnormal signals from the wheel units when the ignition
switch is at the ON position or driving the vehicle.
• The TPMS warning light illuminates for approx. 3.0 s when the ignition switch is turned to the ON position to
inspect for open circuits in the light.
Malfunction Display Function
• When the malfunction detection function detects a malfunction, the TPMS warning light illuminates to advise
the driver. Using the external tester communication function, DTCs can be output to the DLC-2 via the CAN
communication line. At the same time, malfunction detection results are sent to the memory functions.
Memory Function
• The memory function stores DTCs for malfunctions in input/output signal systems. With this function, once a
DTC is stored it is not cleared after the ignition switch has been turned off (LOCK position), even if the
malfunctioning signal system has returned to normal.
• Since the TPMS control module has a built-in non-volatile memory, DTCs are not cleared even if the battery is
removed. Therefore, it is necessary to clear the memory after performing repairs. Refer to the Workshop
Manual for the DTC clearing procedure.
DTC TABLE
End Of Sie
Malfunction location
DTC
(WDS or equivalent)
TPMS warning light
illumination condition
TPMS warning light
illumination pattern
TPMS control module B1342 Illuminated
System configuration malfunction B2477 Not illuminated –
Wheel unit 1 internal fault B2868 Illuminated
Wheel unit 2 internal fault B2869 Illuminated
Wheel unit 3 internal fault B2870 Illuminated
Wheel unit 4 internal fault B2871 Illuminated
CAN bus communication error U0516 Illuminated
CAN system communication error U1900 Not illuminated –
Wheel unit 1 communication
malfunction
U2616 Illuminated
Wheel unit 2 communication
malfunction
U2617 Illuminated
Wheel unit 3 communication
malfunction
U2618 Illuminated
Wheel unit 4 communication
malfunction
U2619 Illuminated
ON
OFF
1 s
0.2 s
ON
OFF
2 s
2 s
ON
OFF
1 s
0.2 s
ON
OFF
1 s
1 s