LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 1988 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> 2.5L CEC System >> Component Testing >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Testing: Notes

NOTE: When test calls for volt-ohmmeter, use of a high impedance digital type is required.
Fig 1: Diagnostic Connectors D1 and D2 Terminal Identification
G11213
  1. Disconnect wiring harness connector from the MAT sensor. Test resistance of the sensor with an ohmmeter. If resistance is not 185-100,700 ohms (3400 ohms at 70°F; 1600 ohms at 100°F), replace sensor. With engine warm, resistance should be less than 1000 ohms.
  2. Connect one ohmmeter lead to sensor connector terminal. Connect other lead, in turn, to ECU harness connector terminals 32 and 14. Repair wiring harness if resistance is greater than 1 ohm.
scientia non olet · About LEMON Manuals