DTC P0340 Camshaft Position Sensor Circuit (4JJ3 without DPD)

1. DTC P0340 description

The CMP sensor is installed on the timing chain sprocket cover at the front of the camshaft idle gear. The CMP sensor detects 5 protrusions in total per 1 engine cycle. The timing chain sprocket has 4 protrusions evenly spaced 90° apart and 1 reference protrusion. The CMP sensor is a magnetic resistance element type sensor, and generates a square wave signal pulse. The sensor has the following circuits.

5 V reference circuit
Low reference circuit
CMP sensor signal circuit

The ECM monitors the signal pulses of the CKP sensor and the CMP sensor to make sure they correlate with each other. If the ECM receives a certain amount of CKP sensor signal pulses with no CMP sensor signal pulses detected, the DTC is set.

2. Condition for setting DTC P0340

Condition for running the DTC

The battery voltage is 9 to 16 V.
The ignition switch is ON.
The CKP sensor signal pulses are detected.
DTCs P0016, P0335, and P0336 are not set.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P0016 Crankshaft Position - Camshaft Position Correlation".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P0335 Crankshaft Position Sensor Circuit".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P0336 Crankshaft Position Sensor Circuit Range/Performance".

Condition for setting the DTC

The ECM detects that no CMP sensor signal pulse is generated while the engine is running.

3. Action taken when DTC P0340 sets

Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A (Euro4).
Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".

The ECM inhibits engine startup.
The ECM inhibits the cruise control.

4. Condition for clearing DTC P0340

Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".