Signal Circuit Inspection

Check voltage
1. IG "OFF" and disconnect MAPS connector.
2. IG "ON' & ENG "OFF".
3. Measure voltage between terminal 1 of MAPS harness connector and chassis ground.
  Specification: Approx. 5V
4. Is the measured voltage within specification?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - If the measured voltage is "0", go to " 4Check open in harness" as follows. If the measured voltage is over "5V", go to "Check short to battery in harness" as follows.
Check short to battery in harness
1. IG "OFF" and disconnect MAPS and PCM connector.
2. Measure resistance between terminal 1 and 2 of MAPS harness connector.
3. Measure resistance between terminal 1 and 4 of MAPS harness connector.
  Specification: Infinite
4. Is the measured resistance within specification?
  YES
  - Go to " 3Check short to ground in harness" as follows.
  NO
  - Repair short to battery in harness and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check short to ground in harness
1. IG "OFF" and disconnect MAPS and PCM connector.
2. Measure resistance between terminal 1 of MAPS harness connector and chassis ground.
  Specification: Infinite
3. Is the measured resistance within specification?
  YES
  - Go to " 4Check open in harness" as follows.
  NO
  - Repair short to ground in harness and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check open in harness
1. IG "OFF" and disconnect MAPS and PCM connector.
2. Measure resistance between terminal 1 of MAFS harness connector and terminal 47 of PCM harness connector.
  Specification: Approx. below 1 Ω.
3. Is the measured resistance within specification?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - Repair open in harness and go to "VERIFICATION OF VEHICLE REPAIR " procedure.