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Home >> Acura >> 1990 >> Integra LS, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> TDC/Crank/CYL Sensor

TDC/Crank/CYL Sensor

  1. Disconnect 8-wire cylinder sensor connector from sensor located on the end of camshaft cover. Measure resistance between terminals "C" and "D". See Fig 1 . Resistance should be 350-700 ohms. If not, replace the distributor assembly.
  2. If resistance is as specified, measure resistance between terminal "C" and ground, and terminal "D" and ground. If continuity is present, replace distributor assembly. If continuity is NOT present, reconnect 8-wire connector. Connect PGM-FI test harness to main wiring harness only; DO NOT  connect to ECU. Measure resistance between terminals B10 and B12 on PGM-FI test harness. Resistance should be 350-700 ohms. If not, repair open in Orange and/or White wire.
  3. If resistance is as specified, check continuity to body ground on terminal B10. If continuity exists, repair short in Orange wire between ECU terminal B10 and distributor harness connector. If continuity does not exist, replace original ECU with a good ECU. Retest to ensure problem goes away.
  4. Disconnect 8-wire cylinder sensor connector from sensor. Measure resistance between terminals "A" and "B". See Fig 1 . Resistance should be 350-700 ohms. If not, replace distributor assembly.
  5. If resistance is as specified, measure resistance between terminal "A" and ground, and terminal "B" and ground. If continuity exists, replace distributor assembly. If continuity does not exist, reconnect 8-wire connector. Connect PGM-FI test harness to main wiring harness only; DO NOT  connect to ECU. Measure resistance between terminals C3 and C4 on PGM-FI test harness. Resistance should be 350-700 ohms. If not, repair open in Orange/Blue wire and/or White/Blue wire.
  6. If resistance is as specified, check continuity to body ground on terminal C3. If continuity exists, repair short in Orange/Blue wire between ECU terminal C3 and distributor connector. If continuity does not exist, replace original ECU with a good ECU. Retest to ensure problem goes away.
  7. Disconnect 8-wire cylinder sensor connector from sensor. Measure resistance between terminals "F" and "G". See Fig 1 . Resistance should be 350-700 ohms. If not, replace distributor assembly.
  8. If resistance is as specified, measure resistance between terminal "F" and ground, and terminal "G" and ground. If continuity exists, replace distributor assembly. If continuity does not exist, reconnect 8-wire connector. Connect PGM-FI Test Harness to main wiring harness only; DO NOT  connect to ECU. Measure resistance between terminals C1 and C2 on PGM-FI test harness. Resistance should be 350-700 ohms. If not, repair open in Blue/Green wire and/or Blue/Yellow wire.
  9. If resistance is as specified, check continuity to body ground on ECU terminal C1. If continuity exists, repair short in Blue/Green wire between ECU terminal C1 and distributor connector. If continuity does not exist, replace original ECU with a good ECU. Retest to ensure problem goes away.
    Fig 1: Identifying TDC/CRANK/CYL Sensor Connector Terminals
    G90H04365Courtesy of AMERICAN HONDA MOTOR CO., INC.
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