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EN(H4SOw/oOBD)-94 ENGINE (DIAGNOSTICS) DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Step Value Yes No 1 CHECK INPUT SIGNAL FOR ECM. sis ground. Connector & terminal (B136) No. 12 (+) — Chassis ground (–): Is the measured value within the specified 0.5 — 4.5 V 2 CHECK POOR CONTACT. There is poor contact. Repair poor con- Replace ECM. 3 CHECK HARNESS BETWEEN CO RESIS- resistor. 3) Measure resistance of harness between ECM and CO resistor connector. Connector & terminal (B136) No. 15 — (B155) No. 1: Is the measured value less than the speci- 1 Ω Repair open circuit 4 CHECK HARNESS BETWEEN CO RESIS- Connector & terminal (B136) No. 15 — Chassis ground: Does the measured value exceed the specified 1 M Ω Repair short circuit 5 CHECK CO RESISTOR. Terminals No. 1 — No. 3: Is the measured value within the specified 4 — 6 k Ω Replace CO resis- 6 CHECK CO RESISTOR. Terminals No. 1 — No. 2: Is the measured value within the specified 0 — 6 k Ω Replace ECM. Replace CO resis- NOTE: |