Toyota Tacoma (2015-2018) Service Manual: Crankshaft Position Sensor "A" Signal Stuck in Range (P03352A,P033531)
DESCRIPTION
The crankshaft position sensor system consists of a crankshaft position sensor plate and a pickup coil. The crankshaft position sensor plate has 34 teeth and is installed to the crankshaft. The pickup coil is made of wound copper wire, an iron core and a magnet. The crankshaft position sensor plate rotates and, as each tooth passes by the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per crankshaft revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection and ignition timing are controlled.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
SAE |
|---|---|---|---|
|
P03352A |
No crankshaft position sensor signal to ECM while cranking (1 trip detection logic). |
|
P0335 |
|
P033531 |
The engine stalls and the engine speed signal value decreases rapidly (1 trip detection logic). |
|
P0335 |
MONITOR DESCRIPTION
A DTC will be stored if any of the following occur:
- The crankshaft position sensor signal (NE signal) is not received by the ECM when the engine is being cranked.
- The engine stalls and the engine speed signal value decreases rapidly (under normal conditions the engine speed will decrease gradually).
WIRING DIAGRAM
Refer to SFI system DTC P033511 (See page .gif)
).
CAUTION / NOTICE / HINT
HINT:
- If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical section.
- After performing repair, clear the DTCs and perform the following procedure
to check that DTCs are not output.
- Start the engine and wait for 3 seconds or more.
- Check for DTCs again (See page
).
1. DATA LIST
HINT:
The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals 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) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Start the engine.
(e) Enter the following menus: Powertrain / Engine / Data List / Engine Speed
Engine|
Techstream Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Engine Speed |
Engine speed Min.: 0 rpm Max.: 16383 rpm |
500 to 600 rpm: Idling (shift lever in neutral, 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. |
PROCEDURE
|
1. |
CHECK DTC OUTPUT (SFI SYSTEM) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| A | .gif) |
REPLACE ECM |
| B | |
GO TO SFI SYSTEM |
Lost Communication With ECM/PCM "A" Missing Message (U010087)
DESCRIPTION
The engine control unit and transmission control unit are located inside the
ECM. The engine control unit intercommunicates with the transmission control ECU
via CAN communication. If ...
Vehicle Speed Sensor "A" No Signal (P050031)
DESCRIPTION
Vehicles, which are equipped with ABS (Anti-lock Brake System), detect the vehicle
speed using the skid control ECU (brake actuator assembly) and speed sensors. Each
speed sensor moni ...
Other materials:
Ecm
Components
COMPONENTS
ILLUSTRATION
ILLUSTRATION
Installation
INSTALLATION
PROCEDURE
1. INSTALL NO. 2 ECM BRACKET
(a) Install the No. 2 ECM bracket to the ECM with the 2 screws.
Torque:
3.2 N·m {33 kgf·cm, 28 in·lbf}
2. INSTALL ECM BRACKET
(a) Install the ECM bracket to the EC ...
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.
(e) Check for DTCs.
2. CLEAR DTC
(a) Connect the Techstream to the DLC3.
(b) Turn t ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
When troubleshooting a vehicle with the diagnosis system, the only difference
from the usual troubleshooting procedure is connecting the Techstream to the vehicle
and reading various data output from the vehicle's skid control ECU (brake actuator
assembly) ...
