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Test Ff - Shift Indicator Light: Notes

  1. Use DVOM, not diagnostic tester, for this step. Turn key off and wait 10 seconds. Put transmission in Neutral. Set DVOM on 20 volt scale. Connect DVOM negative test lead to STO at SELF-TEST connector and positive test lead to positive battery terminal. Install a jumper wire between STI and signal return at SELF-TEST connector. Perform KEY ON/ENGINE OFF (KOEO) SELF-TEST until end of CONTINUOUS SELF-TEST codes (DVOM reads zero volts). Depress and release throttle while watching DVOM reading. If reading did not change to a high voltage, depress throttle to WOT position and release. If STO voltage does not go to high reading, go to step 7). Leave test equipment hooked up. If reading changes to high voltage, remain in OUTPUT STATE CHECK and go to next step.
  2. Set DVOM on 20-volt scale. Connect DVOM positive test lead to battery positive terminal and negative test lead to pin No. 1 on dimmer relay. Depress and release throttle several times to cycle relay on and off. If relay does not cycle, go to step 5). If relay cycles, go to next step.
  3. Set DVOM on 20-volt scale. Connect DVOM positive test lead to battery positive terminal and negative test lead to pin No. 2 on dimmer relay. Depress and release throttle several times to cycle relay on and off. If relay does not cycle, remove jumper wire and replace dimmer relay. If relay does cycle, remove jumper wire and go to next step.
  4. Turn key off and wait 10 seconds. With DVOM set to 200-ohm scale, measure resistance between pin No. 2 of dimmer relay and SIL bulb. If reading is less than 5 ohms, replace SIL bulb. If reading is 5 ohms or more, repair open circuit in harness. Repeat QUICK TEST  .
  5. Set DVOM on 20-volt scale. Connect DVOM positive test lead to battery positive terminal and negative test lead to SIL circuit of top gear switch. Depress and release throttle several times to cycle SIL circuit on and off. If SIL circuit cycles, repair open circuit in harness and repeat QUICK TEST  . If SIL circuit does not cycle, go to next step.
  6. Set DVOM on 20-volt scale. Connect DVOM positive test lead to positive battery terminal and negative test lead to STO circuit of top gear switch. Depress and release throttle several times to cycle STO circuit on and off. If STO circuit cycles, replace top gear switch. If STO does not cycle, repair open circuit in harness and repeat QUICK TEST  .
  7. Use only VOM/DVOM, not diagnostic tester, for this step. Turn key off and wait 10 seconds. Put transmission in top gear. Set DVOM on 20-volt scale. Connect DVOM negative test lead to STO at SELF-TEST connector and positive test lead to positive battery terminal. Install a jumper wire between STI and signal return at SELF-TEST connector. Perform KOEO SELF-TEST until end of CONTINUOUS SELF-TEST codes (DVOM reads zero volts). Depress and release throttle while watching DVOM reading. If reading changed to high voltage, check SIL bulb and fuse No. 15. If bulb and fuse are good, repair short to ground in SIL circuit. If reading did not change to high voltage, go to TEST PP - NO CODES/CODES NOT LISTED  , step 12).
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