4. Measure voltage at wiring harness side fuel pump connector terminal B.
Specification
B+ (Ignition switch at on)
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If the voltage is as specified, inspect the following:
Fuel pump continuity
Fuel pump GND
Wiring harness between fuel pump relay and PCM terminal 1V
z
If not as specified, inspect the following:
Fuel pump relay
Wiring harness connector (Main relay-fuel pump relay-fuel pump)
FUEL PUMP CONTROL SYSTEM INSPECTION
1. Crank the engine and verify that fuel pump relay operation sound is heard.
2. If operation sound is not heard, inspect the following:
z
Fuel pump relay
(see
RELAY INSPECTION
.)
z
Wiring harness and connectors (Main relay-fuel pump relay-PCM terminal 1V)
SPARK TEST
1. Disconnect the fuel pump relay.
2. Verify that each ignition coil and connector is connected properly.
3. Inspect the ignition system in the following procedure.
DESCRIPTION AND POSSIBLE CAUSES
WARNING:
z
High voltage in the ignition system can cause strong electrical
shock which can result in serious injury. Avoid direct contact to the
vehicle body during the following spark test.
STEP
INSPECTION
ACTION
1
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Disconnect the ignition coil from
the spark plugs.
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Remove the spark plugs.
{
Ensure that the spark plugs
don't have carbon deposits.
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Are the spark plugs OK?
Yes
Go to the next step.
No
Perform 2 times of no-load racing at
4000rpm for 2 min to burn off the
carbon deposits.
Then repeat this step.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:38 AM
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