Mazda 2002 6 Workshop Manual page 230

DTC P0122 TP circuit low input
Diagnostic procedure
STEP
1 PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
(See F–66 DTC CONFIRMATION
PROCEDURE.)
• Is same DTC present?
2 CLASSIFY TP SENSOR OR HARNESS
MALFUNCTION
• Connect WDS or equivalent.
• Access TP PID.
• Disconnect TP sensor connector.
• Connect a jumper wire between TP sensor
terminals B and C (harness-side).
• Is voltage above 4.9 V?
3 INSPECT TP SENSOR
• Perform TP sensor inspection.
(See F–51 THROTTLE POSITION (TP)
SENSOR INSPECTION.)
• Is TP sensor okay?
4 INSPECT POWER SUPPLY CIRCUIT VOLTAGE
AT TP SENSOR CONNECTOR
Note
• If DTC P0107 and P2228 are also retrieved
with P0122, go to CONSTANT VOLTAGE
troubleshooting procedure.
• Turn ignition key to ON (Engine OFF).
• Inspect voltage at TP sensor terminal 2k
(harness-side).
• Is there voltage within 4.5—5.5 V?
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to next step.
No Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See F–227 INTERMITTENT CONCERN
TROUBLESHOOTING.)
Yes Go to next step.
No Go to step 4.
Yes Inspect for poor TP sensor connector terminal C
connection. Repair or replace as necessary, then go to
Step 7.
No Replace TP sensor, then go to Step 7.
Yes Go to next step.
No Repair or replace open circuit between TP sensor
connector terminal C and PCM connector terminal 2K
(harness-side).
Then, then go to Step 7.
ACTION
F–101
F