Vtec System Malfunction - Honda Civic 2002-2003 Service Manual

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OTe P1259: VTEC System Malfunction
Special Tools Required
• Pressure gauge adapter 07NAJ-P07010A
• AfT
low pressure gauge w/panel 07406-0070300
• AfT
pressure hose 07406-0020201
• AfT
pressure hose, 2,210 mm 07MAJ-PY4011A
• AfT
pressure adapter 07MAJ-PY40120
• Oil pressure hose 07ZAJ-S5AA200
1. Reset the ECM (see page 11-4).
2. Check the engine oil level, and refill if necessary.
3. Start the engine. Hold the engine at 3,000 rpm with
no load (in neutral) until the radiator fan comes on.
4. Road test the vehicle:
Accelerate in the 15t gear to an engine speed over
4,000 rpm. Hold the speed for at least 2 seconds. If
DTC P1259 is not repeated during the first road test,
repeat the test two more times.
Is OTe P1259 indicated?
YES-Go to step 5.
NO-Intermittent failure, system is OK at this time.
Check the oil consumption if oil was added in step
2. Check for poor connections or loose terminals at
the VTEC solenoid valve, the VTEC oil pressure
switch, and at the ECM .•
5. Turn the ignition switch OFF.
6. Disconnect the VTEC oil pressure switch 2P
connector.
7. Check for continuity between VTEC oil pressure
switch 2P connector terminals No.1 and NO.2.
VTEC OIL PRESSURE SWITCH
2P CONNECTOR
Q
Terminal side of male terminals
Is there continuity?
YES-Go to step 8.
NO-Replace the VTEC oil pressure switch .•
8. Turn the ignition switch ON (II).
9. Measure voltage between VTEC oil pressure switch
2P connector terminal No.1 and body ground.
VTEC OIL PRESSURE SWITCH
2P CONNECTOR
VTPSW
IBLU/BLKI
Wire side of female terminals
Is there battery voltage?
YES-Gotostep 14.
NO-Go to step 10 .
(conrdl
11-123