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Home >> Acura >> 1995 >> Integra GS-R, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Trouble Codes >> Code 22 - VTEC Pressure Switch (1.8L GS-R)
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Code 22 - VTEC Pressure Switch (1.8L GS-R)

  1. Turn ignition off. Remove BACK-UP fuse (7.5-amp) from underhood fuse/relay box for 10 seconds to reset ECM. Warm engine until cooling fan comes on. Road-test vehicle. While in 1st gear, accelerate until engine speed reaches 6000 RPM, then hold for at least 2 seconds. Repeat procedure 3 times. Retrieve codes. If Code 22 does not appear, problem is intermittent. Inspect for poor connections at Variable Valve Timing and Lift Electronic Control System (VTEC) pressure switch and ECM connector.
  2. If Code 22 exists, turn ignition off. Unplug switch connector. Test for continuity between Black wire terminal and ground. If continuity does not exist, repair open in Black wire between switch connector and body ground. If continuity exists, connect ECM Test Harness (07LAJ-PT3010A ) between ECM and ECM harness. See Figure .
  3. Test for continuity between test terminal D6 and Blue/Black wire terminal. If continuity does not exist, repair open in Blue/Black wire between VTEC pressure switch connector and ECM. If continuity exists, test for continuity between test terminal D6 and body ground. If continuity does not exist, go to next step. If continuity exists, repair short in Blue/Black wire between VTEC pressure switch connector and ECM.
  4. Connect external oil pressure gauge. With engine at normal operating temperature, measure oil pressure at 1000, 3000, and 5000 RPM. If pressure is less than 7 psi (0.5 kg/cm2 ), replace VTEC solenoid valve. If pressure is 7 psi (0.5 kg/cm2 ) or more, test for continuity between switch terminals.
  5. If continuity does not exist, replace VTEC pressure switch. If continuity exists, unplug VTEC solenoid valve connector. Connect battery voltage to VTEC solenoid valve connector terminal. Start engine. Measure oil pressure at 5000 RPM.
  6. If oil pressure is less than 57 psi (4 kg/cm2 ), replace VTEC solenoid valve. If oil pressure is 57 psi (4 kg/cm2 ) or more, test for continuity between VTEC pressure switch terminals at 5000 RPM. If continuity exists, replace VTEC pressure switch. If continuity does not exist, temporarily substitute known good ECM, then retest system.
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