DTC “c11” (p0340): cmp sensor circuit malfunction

Detected condition and possible cause

Detected condition	Possible cause
The signal does not reach ecm for 3 sec. Or more, after receiving the starter signal.	Cmp sensor circuit open or short. Cmp sensor malfunction. Ecm malfunction.

Wiring diagram

Troubleshooting Caution

when using the multi-circuit tester, do not strongly touch the terminal of the ecm coupler with a needle pointed tester probe to prevent terminal damage.

Note

after repairing the trouble, clear the dtc using sds tool. Refer to “use of sds diagnosis reset procedures” .

Step	Action	Yes	No
1	1 Turn the ignition switch off. 2 Lift and support the fuel tank. Refer to “fuel tank removal and installation” in section 1g . 3 Remove the air cleaner box. Refer to “air cleaner box removal and installation” in section 1d . 4 Check the cmp sensor coupler (1) for loose or poor contacts.

If ok, remove the cmp sensor. Refer to “cmp sensor removal and installation” in section 1c .

5. Connect 3 new 1.5 V batteries in series, 1 kΩ resistor and the multi-circuit tester as shown in the figure.

Special tool : 09900–25008 (multi circuit
tester set) Tester knob indication voltage ( )

6. Under this condition, if a suitable screwdriver touching the pick-up surface of the cmp sensor is moved, the tester reading voltage changes (0.8 V and less . 4.3 V and more).

Is the voltage ok?

• B/y, r or b/br wire open or shorted to ground.
• Loose or poor contacts on the cmp sensor coupler or ecm coupler (terminal “7”, “8” or “35”).
• If wires and connection are ok, intermittent trouble or faulty ecm.
• Recheck each terminal and wire harness for open circuit and poor connection.
• Replace the ecm with a known good one, and inspect it again.
• B/y, r or b/br wire open or shorted to ground.
• Loose or poor contacts on the cmp sensor coupler or ecm coupler (terminal “7”, “8” or “35”).
• If wires and connection are ok, intermittent trouble or faulty ecm.
• Recheck each terminal and wire harness for open circuit and poor connection.
• Replace the ecm with a known good one, and inspect it again.

• Inspect that metal particles or foreign material stuck on the cmp sensor and camshaft tip.
• If there are no metal particles and foreign material, then replace the cmp sensor with a new one.
• Inspect that metal particles or foreign material stuck on the cmp sensor and camshaft tip.
• If there are no metal particles and foreign material, then replace the cmp sensor with a new one.