Fuel Pump Control System Inspection; Spark Test - Mazda MX-5 Miata Sport 2007 Manual

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
4. Measure voltage at wiring harness side fuel pump connector terminal B.
Specification
B+ (Ignition switch at on)
If the voltage is as specified, inspect the following:

Fuel pump continuity

Fuel pump GND

Wiring harness between fuel pump relay and PCM terminal 1H

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:
Fuel pump relay

(See RELAY INSPECTION .)
Wiring harness and connectors (Main relay-fuel pump relay-PCM terminal 1H


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.
WARNING:
IGNITION SYSTEM INSPECTION TABLE
STEP
1
2007 Mazda MX-5 Miata Sport
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.
INSPECTION
Disconnect the

ignition coil from
the spark plugs.
Remove the spark

plugs.
Verify that

ACTION
Yes
Go to the next step.
No Perform no-load racing at
4,000 rpm for 2 min, 2
times to burn off the
carbon deposits.