DTC P0642 [MZI-3.7]
DTC P0642 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
6
terminal RC (wiring harness-side) and
PCM terminal 2S (wiring harness-side).
z
Is there continuity?
No
Repair or replace suspected part, then go to
Step 9.
7
INSPECT BATTERY POSITIVE
TERMINAL FOR POOR INSTALLATION
z
Turn the engine switch off.
z
Inspect the battery positive terminal for
looseness.
z
Is there any malfunction?
Yes
Connect the battery positive terminal
correctly, then go to Step 9.
No
Go to the next step.
8
INSPECT GENERATOR CIRCUIT FOR
OPEN CIRCUIT
z
Inspect the continuity between generator
terminal B (wiring harness-side) and
battery positive terminal (wiring
harness-side)
z
Is there continuity?
Yes Go to the next step.
No
Repair or replace suspected part, then go to
the next step.
9
VERIFY TROUBLESHOOTING OF DTC
P0626 HAS BEEN COMPLETED
z
Verify that all disconnected connectors
reconnected.
z
Clear the DTC from the PCM memory
using the M-MDS.
z
Perform the KOEO or KOER self-test
using the M-MDS. (See
KOEO/KOER
SELF TEST [MZI-3.7]
.)
z
Is the PENDING CODE for the DTC
present?
Yes
Replace the PCM, then go to the next step.
(See
PCM REMOVAL/INSTALLATION
[MZI-3.7]
.)
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
z
Perform the "AFTER REPAIR
PROCEDURE". (See
AFTER REPAIR
PROCEDURE [MZI-3.7]
.)
z
Are any DTCs present?
Yes Go to the applicable DTC inspection. (See
DTC TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
DTC P0642
Sensor reference voltage circuit low
DETECTION
CONDITION
z
Indicates the reference voltage circuit is lower than reference voltage
minimum.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:40 AM
Page 290
© 2005 Mitchell Repair Information Company, LLC.
