Mazda CX-9 Grand Touring 2009 Manual page 1004

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
INSPECT TP SENSOR SIGNAL
CIRCUITS FOR SHORT EACH OTHER
Disconnect the TP sensor and PCM
connector.
7
Measure resistance between Throttle
body connector terminal D and C.
Is the resistance more than 10
kilohms?
VERIFY TROUBLESHOOTING OF
DTC P0223 HAS BEEN COMPLETED
Make sure to reconnect all
disconnected connectors.
Clear the DTC from the PCM memory
8
using the M-MDS.
Start the engine.
Perform the "KOEO/KOER self-test".
(See KOEO/KOER SELF TEST
[MZI-3.7].)
Is same DTC present?
VERIFY AFTER REPAIR PROCEDURE
Perform the "AFTER REPAIR
9
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-3.7].)
Are any DTCs present?
DTC P0230 [MZI-3.7]
DTC P0230 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0230 FP primary circuit
DETECTION
CONDITION
POSSIBLE
CAUSE
2008 Mazda CX-9 Grand Touring
The PCM monitors the fuel pump circuit output from the PCM. The test fails when the
fuel pump output is commanded ON (grounded) and excessive current draw is detected
on the fuel pump circuit. The test also fails when the fuel pump output is commanded
OFF and voltage is not detected on the fuel pump circuit. The PCM expects to detect
vehicle power voltage coming through the fuel pump relay coil to the fuel pump circuit.
Fuel pump relay malfunction
Connector or terminal malfunction
Open circuit wiring harness between fuel pump relay terminal E and PCM terminal 1V
Short to ground circuit between fuel pump relay terminal E and PCM terminal 1V
Open circuit wiring harness between ignition switch and fuel pump relay terminal A
Yes Go to the next step.
Repair or replace suspected part, then go to Step
No
Replace the PCM, then go to the next step. (See
Yes PCM REMOVAL/INSTALLATION [MZI-
3.7] .)
No Go to the next step.
Go to the applicable DTC inspection. (See DTC
Yes
TABLE [MZI-3.7].)
No Troubleshooting completed.
8.