Mazda RX-8 2004 Service Highlights page 28

P2101 Drive-by-wire relay control circuit problem
• The PCM monitors the input voltage from the drive-by-wire relay when the PCM turns the drive-by-wire relay
on. If the input voltage is less than 5.0 V, the PCM determines that the drive-by-wire relay control circuit voltage
is low.
• The PCM monitors the input voltage from the drive-by-wire relay when the PCM turns the drive-by-wire relay
off. If the input voltage is more than 5.0 V, the PCM determines that the drive-by-wire relay control circuit
voltage is high.
P2106 Throttle actuator control system-forced limited power
• The PCM monitors the throttle actuator control current when the ignition switch is on. If the control current is
less than 8 A or more than 11 A, the PCM determines that the throttle actuator control system is under forced
limited power.
P2107 Throttle actuator control module processor error
• Throttle actuator control module internal processor error.
P2108 Throttle actuator control module performance error
• Throttle actuator control module internal communication error.
P2109 TP sensor minimum stop range/performance problem
• The PCM monitors the minimum TP when the closed TP learning is completed. If the TP is less than 11.5 % or
more than 24.3 %, the PCM determines that there is a TP sensor minimum stop range/performance problem.
P2112 Throttle actuator control system range/performance problem
• The PCM monitors the throttle actuator control duty ratio when the engine is running. If the duty ratio is more
than 95 %, the PCM determines that there is a throttle actuator control system range/performance problem.
P2119 Throttle actuator control throttle body range/performance problem
• The PCM compares the TP with default TP when the ignition switch is turned off. If the TP is higher than the
default TP, the PCM determines that there is a throttle actuator control throttle body range/performance
problem.
P2122 APP sensor No.1 circuit low input
• The PCM monitors the input voltage from the APP sensor No.1 when the engine is running. If the input voltage
is less than 0.3 V, the PCM determines that the APP sensor No.1 circuit input voltage is low.
P2123 APP sensor No.1 circuit high input
• The PCM monitors the input voltage from the APP sensor No.1 when the engine is running. If the input voltage
is more than 4.8 V, the PCM determines that the APP sensor No.1 circuit input voltage is high.
P2127 APP sensor No.2 circuit low input
• The PCM monitors the input voltage from the APP sensor No.2 when the engine is running. If the input voltage
is less than 0.3 V, the PCM determines that the APP sensor No.2 circuit input voltage is low.
P2128 APP sensor No.2 circuit high input
• The PCM monitors the input voltage from the APP sensor No.2 when the engine is running. If the input voltage
is more than 4.8 V, the PCM determines that the APP sensor No.2 circuit input voltage is high.
P2135 TP sensor No.1/No.2 voltage correlation problem
• The PCM compares the input voltage from TP sensor No.1 with the input voltage from TP sensor No.2 when
the engine is running. If the difference is more than the specification, the PCM determines that there is a TP
sensor No.1/No.2 voltage correlation problem.
P2136 TP sensor No.1/No.3 voltage correlation problem
• The PCM compares the input voltage from TP sensor No.1 with the input voltage from TP sensor No.3
(calculation value in PCM) when the engine is running. If the difference is more than the specification, the PCM
determines that there is a TP sensor No.1/No.3 voltage correlation problem.
P2138 APP sensor No.1/No.2 voltage correlation problem
• The PCM compares the input voltage from APP sensor No.1 with the input voltage from APP sensor No.2
when the engine is running. If the difference is more than the specification, the PCM determines that there is an
APP sensor No.1/No.2 voltage correlation problem.
P2195 Front HO2S signal stuck lean
• The PCM monitors the front HO2S output current when the following conditions are met. If the average output
current is more than 1.2 A for 25 s, the PCM determines that the front HO2S signal remains lean.
MONITORING CONDITION
— ECT: more than 70 °C {158 °F}
— Engine speed: 1,000—3,200 rpm
— MAF amount: 6—80 g/s {0.80—10.58 lb/min}
— Target A/F feedback system status: feedback control
— Input voltage from the rear HO2S: more than 0.7 V
ON-BOARD DIAGNOSTIC
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