LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Suzuki >> 1987 >> Samurai Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Engine General Information And Diagnosis) >> Diagnostic Information and Procedures >> DTC P0111, P0112 or P0113 >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the MAF/IAT sensor.
  2. Ignition ON, verify that the IAT sensor parameter is at -40°C (-40°F).
    • If greater than -40°C (-40°F), test the signal circuit for a short to ground. If the circuit/connections test normal, replace the engine control module (ECM).
  3. Ignition OFF, remove the fuse that supplies B+ to circuit terminal C2-56 of the ECM.
    CAUTION: Do NOT use a test lamp to test the continuity of the circuit. Damage to the control module may occur due to excessive current draw.
  4. Test for less than 5 ohms between the low reference circuit terminal E and ground.
    • If greater than 5 ohms, test the low reference circuit for an open/high resistance, or for a short to voltage. If the circuit/connections test normal, replace the ECM.
  5. Install the fuse that supplies B+ to circuit terminal C2-56 of the ECM.
    NOTE: If the fuse in the jumper wire opens, the signal circuit is shorted to a voltage and the sensor may be damaged.
  6. Ignition ON, install a 3A fused jumper wire between the signal circuit terminal D and ground circuit terminal C. Verify the IAT sensor parameter is greater than 134°C (274°F).
    • If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit/connections test normal, replace the ECM.
  7. If all circuits/connections test normal, test or replace the MAF/IAT sensor.
scientia non olet · About LEMON Manuals