Toyota Corolla Cross: Crankshaft Position Sensor "A" No Signal (P033531)

DESCRIPTION

The TCM receives the engine speed signal from the ECM via CAN communication and direct line.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P033531	Crankshaft Position Sensor "A" No Signal	When the engine speed signal received from the ECM via CAN communication is 500 rpm or more, the signal received via direct line is 0 rpm for 5 seconds or more (1 trip detection logic).	SFI system ECM TCM Wire harness or connector Engine stop and start ECU Certification ECU (Smart key ECU assembly) (w/ Smart Key System)	Comes on	DTC stored	SAE Code: P0335

MONITOR DESCRIPTION

The TCM detects malfunctions by comparing the engine speed signals received from the ECM via direct line and CAN communication.

If the TCM receives the engine speed signal via CAN communication but not via direct line, it will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs	P0335: Crankshaft position sensor (CKP Sensor)/Verify pulse input
Required sensors/Components (Main)	ECM
Required sensors/Components (Sub)	CAN communication system
Frequency of operation	Continuous
Duration	5 sec.
MIL operation	Immediate
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

Auxiliary battery voltage	8 V or more
Ignition switch	ON
Starter	OFF
Lost Communication with ECM/PCM (U0100) (Pending / MIL)	Not detected
Following condition is met	3 sec. or more
- Ignition switch	ON
- Auxiliary battery voltage	10 V or more
Engine speed (Communication data from ECM)	500 rpm or more

TYPICAL MALFUNCTION THRESHOLDS

Crankshaft position sensor (CKP Sensor) revolution

0 rpm or less

COMPONENT OPERATING RANGE

Crankshaft position sensor (CKP Sensor) revolution

500 rpm or more

CONFIRMATION DRIVING PATTERN

HINT:

• After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
• When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

  Click here

1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
2. Turn the ignition switch off and wait for 2 minutes or more.
3. Turn the ignition switch to ON and turn the GTS on.
4. Start the engine and wait for 5 seconds or more. [*1]

   HINT:

   [*1]: Normal judgment procedure.

   The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

5. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
6. Input the DTC: P033531.
7. Check the DTC judgment result.

   GTS Display	Description
   NORMAL	DTC judgment completed System normal
   ABNORMAL	DTC judgment completed System abnormal
   INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
   N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

   HINT:

   • If the judgment result shows NORMAL, the system is normal.
   • If the judgment result shows ABNORMAL, the system has a malfunction.
   • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• Perform the universal trip to clear permanent DTCs.

  Click here

• Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.

  Click here

• Check that no DTCs are stored after performing initialization.

  Click here

HINT:

• If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical section.
• Read freeze frame data using the GTS. The TCM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

DATA LIST

HINT:

The engine speed may be indicated as zero despite the engine running normally. This is caused by the NE signal not being received from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the crankshaft position sensor output voltage is insufficient.

(a) Start the engine.

(b) Enter the following menus:

(c) According to the display on the GTS, read the Data List.

Powertrain > Transmission > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Engine Speed	Engine speed	Min.: 0 rpm Max.: 16383 rpm	750 to 850 rpm: Engine idling (shift lever in P, engine warmed up and A/C off)	When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

Powertrain > Transmission > Data List

Tester Display
Engine Speed

PROCEDURE

1.	CHECK DTC OUTPUT (STOP AND START SYSTEM (P033562))

(a) Check for stop and start system DTCs.

Powertrain > Stop and Start > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTC P033562 are output	B

B

GO TO STOP AND START SYSTEM

A

2.	CHECK VEHICLE CONDITION

(a) Choose the model to be inspected.

Result	Proceed to
w/o Smart Key System	A
w/ Smart Key System	B

B

GO TO STEP 9

A

3.	READ VALUE USING GTS (ENGINE SPEED)

(a) Enter the following menus:

(b) According to the display on the GTS, read the Data List.

Powertrain > Transmission > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Engine Speed	Engine speed	Min.: 0 rpm Max.: 16383 rpm	750 to 850 rpm: Engine idling (shift lever in P, engine warmed up and A/C off)	When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

Powertrain > Transmission > Data List

Tester Display
Engine Speed

OK:

The GTS display changes correctly in response to the engine speed.

OK

CHECK FOR INTERMITTENT PROBLEMS Click here Click here

NG

4.	CHECK HARNESS AND CONNECTOR (TCM - ECM)

(a) Disconnect the A47 ECM connector.

(b) Disconnect the C80 TCM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A47-16 (NEO) - C80-13 (NE)	Always	Below 1 Ω
A47-16 (NEO) or C80-13 (NE) - Body ground and other terminals	Always	10 kΩ or higher

(d) Connect the C80 TCM connector.

(e) Connect the A47 ECM connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.	REPLACE TCM

Click here

NEXT

6.	PERFORM REGISTRATION AND INITIALIZATION

(a) Perform Registration and Initialization.

for Registration: Click here

for Initialization: Click here

NEXT

7.	CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED (P033531)

(a) Start the engine and wait for 5 seconds or more.

(b) Enter the following menus:

(c) Read the DTCs.

Powertrain > Transmission > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTC P033531 is output	B

A

END

B

8.	REPLACE ECM

Click here

NEXT

PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here for Initialization: Click here

9.	CHECK DTC OUTPUT (SMART KEY SYSTEM (P033562))

(a) Check for smart key system DTCs.

Result	Proceed to
DTCs are not output	A
P033562 is output	B

B

GO TO SMART KEY SYSTEM

A

10.	CHECK HARNESS AND CONNECTOR (TCM - ECM)

(a) Disconnect the A47 ECM connector.

(b) Disconnect the C80 TCM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A47-16 (NEO) - C80-13 (NE)	Always	Below 1 Ω
A47-16 (NEO) or C80-13 (NE) - Body ground and other terminals	Always	10 kΩ or higher

(d) Connect the C80 TCM connector.

(e) Connect the A47 ECM connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.	REPLACE TCM

Click here

NEXT

PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here for Initialization: Click here

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