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DTC P1753/Flash Code 1: Lock-Up Control Solenoid

  1. Turn ignition off. Disconnect TCM harness connectors "A" (26-pin). See Figure . Turn ignition on. Check voltage between TCM harness connector "A" terminals No. 15 (Yellow wire) and No. 13 (Brown/Black wire) or No. 26 (Brown/Black wire). See WIRING DIAGRAMS  . If voltage is present, go to next step. If voltage is not present, go to step  3 .
  2. Repair short to power in circuit between TCM harness connector "A" terminal No. 15 (Yellow wire) and lock-up control solenoid valve. See WIRING DIAGRAMS  .
  3. Turn ignition off. Check resistance between TCM harness connector "A" terminals No. 15 (Yellow wire) and No. 13 (Brown/Black wire) or No. 26 (Brown/Black wire). If resistance is not 12-25 ohms, go to next step. If resistance is 12-25 ohms, check for loose TCM connectors. Repair as necessary. If connectors are okay, substitute with a known-good solenoid valve assembly or TCM and recheck system. If symptom or problem goes away, replace faulty component.
  4. Disconnect lock-up control solenoid valve harness connector. Check continuity between TCM harness connector "A" terminals No. 15 (Yellow wire) and No. 13 (Brown/Black wire) or No. 26 (Brown/Black wire). See Figure . If continuity does not exist, go to next step. If continuity exists, repair short to ground in circuit between TCM harness connector "A" terminal No. 15 (Yellow wire) and lock-up control solenoid valve. See WIRING DIAGRAMS  .
  5. Check resistance between body ground and lock-up control solenoid connector terminal No. 1 (Yellow wire). If resistance is not 12-25 ohms, replace lock-up control solenoid valve assembly. If resistance is 12-25 ohms, check for open in circuit between TCM harness connector "A" terminal No. 15 (Yellow wire) and lock-up control solenoid valve. See WIRING DIAGRAMS  .
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