Dtc P0122 [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Inspect the resistance between TP sensor
terminal A (wiring harness-side) and body
ground.
• Is the resistance approx. 0 ohm ?
VERIFY TP SENSOR
14
• Does resistance smoothly change while
gradually opening throttle valve?
INSPECT PCM TERMINALS FOR
ELECTRICAL CORROSION
• Disconnect the PCM connector.
15
• Inspect the PCM and PCM connector male
and female terminals for electrical corrosion.
• Is any electrical corrosion found?
VERIFY TROUBLESHOOTING OF DTC
P0121 COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Start the engine.
• Clear the DTC from the PCM memory using
16 the WDS or equivalent.
• Access RPM, TP and MAF PIDs using WDS
or equivalent.
• Verify TP PID reading is below 50% while
MAF PID is below 4.8 g/s {0.6 lb/min} and
RPM PID is above 500 rpm.
• Is the PENDING CODE for this DTC present?
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
17
(See AFTER REPAIR PROCEDURE
• Are any DTC present?
DTC P0122
DETECTION
CONDITION
Downloaded from
[LF].)

DTC P0122 [LF]

TP sensor circuit low input
• If the PCM detects the TP sensor voltage at PCM terminal 2I is below 0.1
V while the engine running to on, the PCM determines that the TP circuit has
malfunction.
Diagnostic support note
https://carmanualshub.com/
• Repair or replace the terminal.
Go to Step 16.
Yes Go to the next step.
No Replace the TP sensor, then go to Step 16.
Repair the terminal, then go to the next
Yes
step.
No Go to the next step.
Replace the PCM, then go to the next step.
Yes
(See PCM REMOVAL/INSTALLATION
[LF].)
No Go to the next step.
Go to the applicable DTC troubleshooting.
Yes
(See DTC TABLE [LF].)
No Troubleshooting completed.
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B3E010201084W16