Page 1249 of 3051

4 CHECK GROUND CIRCUIT
1. Reconnect ECM harness connector.
2. Check harness continuity between CKPS (OBD) terminal 2 and engine ground.
Refer to woring diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+Joint connector-1 (where fitted)
+Joint connector F46 (where fitted)
+Harness for open or short between crankshaft position sensor (OBD) and ECM
+Harness for open or short between crankshaft position sensor (OBD) and TCM (Transmission control module)
©Repair open circuit or short to power in harness or connectors.
6 CHECK CRANKSHAFT POSITION SENSOR (OBD)
Refer to ªComponent Inspectionº, EC-824.
OK or NG
OK©GO TO 7.
NG©Replace crankshaft position sensor (OBD).
7 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-670.
©INSPECTION END
SEF960N
Component InspectionNLEC1760CRANKSHAFT POSITION SENSOR (OBD)NLEC1760S011. Disconnect crankshaft position sensor (OBD) harness connec-
tor.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.
SEF134W
5. Check resistance as shown in the figure.
Resistance: 166 - 204W[at 20ÉC (68ÉF)]
If NG, replace crankshaft position sensor (OBD).
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS) (OBD)SR20DE
Diagnostic Procedure (Cont'd)
EC-824
Page 1250 of 3051

SEF998R
SEF853B
Component DescriptionNLEC1761The camshaft position sensor is a basic component of the engine
control system. It monitors engine speed and piston position.
These input signals to the engine control system are used to con-
trol fuel injection, ignition timing and other functions.
The camshaft position sensor has a rotor plate and a wave-form-
ing circuit. The rotor plate has 360 slits for a 1É (POS) signal and
4 slits for a 180É (REF) signal. The wave-forming circuit consists
of Light Emitting Diodes (LED) and photo diodes.
The rotor plate is positioned between the LED and the photo diode.
The LED transmits light to the photo diode. As the rotor plate turns,
the slits cut the light to generate rough-shaped pulses. These
pulses are converted into on-off signals by the wave-forming circuit
and sent to the ECM.
The distributor is not repairable and must be replaced as an
assembly except distributor cap and rotor head.
ECM Terminals and Reference ValueNLEC1762Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
66 L
Camshaft position sen-
sor (Reference signal)[Engine is running]
+Warm-up condition
+Idle speed0.1 - 0.4V
SEF006W
75 L[Engine is running]
+Engine speed is 2,000 rpm0.1 - 0.4V
SEF007W
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)SR20DE
Component Description
EC-825
Page 1251 of 3051
TERMI-
SEF004W
SEF005W
DTCNo. Malfunctionis detecte dwhe n... CheckItem s(Possibl eCause)
SEF058Y
PROCEDUR EFO RMALFUNCTIO NA
Wit hCONSU LT -II
Wit hGST
No Tools
ECM Terminals and Reference Value (Cont'd)
Page 1252 of 3051
2) Turn ignition switch ªOFFº, wait at least 10 seconds and then
turn ªONº.
3) Perform ªDiagnostic Test Mode IIº (Self-diagnostic results) with
ECM.
4) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-830.
SEF058Y
PROCEDURE FOR MALFUNCTION B AND CNLEC1764S02With CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Start engine and run it for at least 2 seconds at idle speed.
4) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-830.
With GST
Follow the procedure ªWith CONSULT-IIº above.
No Tools
1) Start engine and run it for at least 2 seconds at idle speed.
2) Turn ignition switch ªOFFº, wait at least 10 seconds and then
turn ªONº.
3) Perform ªDiagnostic Test Mode IIº (Self-diagnostic results) with
ECM.
4) If 1st trip DTC is detected, go to ªDiagnostic Procedureº,
EC-830.
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)SR20DE
DTC Confirmation Procedure (Cont'd)
EC-827
Page 1253 of 3051
Wiring DiagramNLEC1765MODELS WITH ECM IN ENGINE COMPARTMENTNLEC1765S01
YEC699
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)SR20DE
Wiring Diagram
EC-828
Page 1254 of 3051
MODELS WITH ECM IN CABINNLEC1765S02
YEC922
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)SR20DE
Wiring Diagram (Cont'd)
EC-829
Page 1255 of 3051
DiagnosticProcedure
1 CHEC KSTARTIN GSYSTEM
2 RETIGHTE NGROUN DSCREWS
SEF202X
Diagnostic Procedure
Page 1256 of 3051

3 CHECK POWER SUPPLY
1. Disconnect camshaft position sensor harness connector.
SEF211X
2. Turn ignition switch ªONº.
3. Check voltage between CMPS terminal 2 and ground with CONSULT-II or tester.
SEF232W
Voltage: Battery voltage
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
+Joint connector-3 (where fitted)
+Harness connectors E76, F36 (where fitted)
+Joint connector F46 (where fitted)
+Harness for open or short between CMPS and ECM relay
+Harness for open or short between CMPS and ECM
©Repair open circuit or short to ground or short to power in harness or connectors.
5 CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between CMPS terminal 3 and ECM terminal 85, CMPS terminal 4 and ECM terminals 66,
75.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)SR20DE
Diagnostic Procedure (Cont'd)
EC-831