Test M - Neutral-A/C Switch
- Code 67 Displayed. When this code is displayed, determine which engine and system is being tested and proceed to correct step as listed.
- For 1.9L EFI models with Man. Trans., go to step 5).
- For 2.3L EFI/Turbo models with Man. Trans., go to step 7).
- For 2.3L EFI/Turbo SVO models with Octane Switch, go to step 8).
- Turn key off and wait 10 seconds. Make sure heater control is in "OFF" position and that transaxle/transmission is in Neutral or Park. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box and connect ECA. Turn key on, leaving engine off. Set DVOM on 20-volt scale and measure voltage between test pin 30 and chassis ground. If reading is less than 1.0-volt, go to step 4). If reading is 1.0-volt or higher, go to next step.
- Turn key off and wait 10 seconds. Leave breakout box installed and ECA connected. Locate neutral drive switch and disconnect harness at switch. Set DVOM on 200-ohm scale and measure resistance across switch. If reading is less than 5 ohms, repair open in neutral drive circuit. Repeat QUICK TEST . If reading is 5 ohms or more, replace neutral drive switch and repeat QUICK TEST .
- Install breakout box and connect ECA. Turn key on, leaving engine off. Set DVOM on 20-volt scale, and turn A/C control switch off. Measure voltage between test pin 10 and chassis ground. On 2.3L Turbo models with Auto. Trans., check for continuous code 18. On all others, if reading is 1.0-volt or more, repair short to power in A/C clutch circuit. Repeat QUICK TEST . If reading is less than 1.0 volt, replace ECA and repeat QUICK TEST .
- Turn key off and wait 10 seconds. Make sure that A/C is off, if equipped. Ensure that transaxle/transmission is in Neutral and that clutch is released. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box and connect ECA. With DVOM on 200-ohm scale, measure resistance between test pins 30 and 46. If reading is less than 5 ohms, go to step 4). If reading is 5 ohms or more, go to next step.
- Turn key off. With breakout box and ECA connected, set DVOM on 200-ohm scale. Locate neutral switch (on transaxle) and clutch switch (under dash). Disconnect wiring harness from both switches. Measure resistance across each switch. If reading at both switches is less than 5 ohms, go to step 4). If reading at either or both switches is 5 ohms or more, replace defective switch(es). Connect harness and repeat QUICK TEST .
- Turn key off and wait 10 seconds. Make sure A/C is off, if equipped. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA disconnected. With DVOM on 200-ohm scale, measure resistance between test pin 30 and 46. If reading is less than 5 ohms, go to step 4). If reading is 5 ohms or more, repair open neutral input or signal return circuit. Repeat QUICK TEST .
- Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box and connect ECA. Set DVOM on 20-volt scale. Connect positive lead to test pin 30 and negative lead to test pin 46. Turn key on, leaving engine off. Cycle octane switch several times while reading DVOM. If voltage changes from 0 to 5 volts, replace ECA and repeat QUICK TEST . If voltage does not change, EEC-IV system is okay. Check turbocharging system.
