Mazda 3 Workshop Manual page 302

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
• Verify related service repair information
2
availability.
• Is any related repair information
available?
CLASSIFY TP SENSOR OR WIRING
HARNESS MALFUNCTION
• Connect the WDS or equivalent.
• Access the TP PID.
3
• Disconnect the TP sensor connector.
• Connect a jumper wire between TP
sensor terminals B and C (wiring harness-
side).
• Is the voltage above 4.9 V?
INSPECT TP SENSOR
• Perform TP sensor inspection.
4
(See THROTTLE POSITION (TP)
SENSOR INSPECTION
• Is TP sensor normal?
INSPECT POWER SUPPLY CIRCUIT
VOLTAGE AT TP SENSOR
CONNECTOR
Note
• If DTC P0107 and P2228 are
also retrieved with P0122, go to
CONSTANT VOLTAGE
5
troubleshooting procedure.
• Turn the ignition switch to the ON
position (Engine off).
• Inspect the voltage at TP sensor terminal
C (wiring harness-side).
• Is the voltage within 4.5- 5.5 V?
VERIFY TP SIGNAL CIRCUIT FOR
SHORT TO GROUND
• Inspect for continuity between TP sensor
6
terminal B (harness-side) and body
ground.
• Is there continuity?
7
Downloaded from
Yes
No Go to the next step.
Yes Go to the next step.
No Go to step 5.
Yes
[LF].)
No Replace the TP sensor, then go to Step 7.
Yes Go to the next step.
No
Yes
No Go to the next step.
Yes Replace the PCM, then go to the next step.
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Perform repair or diagnosis according to the
available repair information.
• If the vehicle is not repaired, go to the next
step.
Inspect TP sensor terminal C for poor
connection. Repair or replace if necessary, then
go to Step 7.
Repair or replace open circuit in wiring harness
between TP sensor connector terminal C and
PCM terminal 2W (wiring harness-side).
Then, go to Step 7.
Repair or replace the wiring harness, then go to
Step 7.
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