NEXON DIAGNOSTIC MANUAL

Nexon Gasoline – EMS ECU Bosch

DTC Troubleshooting Manual

Version: 0.1

Date: 26-08-2017

Prepared By: Sunu S Babu/Yogesh Jadhav

Checked By: Yeshwant Jadhav

Approved By: Satish Kumar

Document Part No: 2921 02 224 A1736

Page: 516 of 1203

TATA MOTORS Ltd.

This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author.

P0336-1F: Crankshaft Position Sensor “A” Circuit Range/Performance – Circuit Intermittent

Overview:

ISO Code

P0336-1F

Customer Symptom

Engine might get stalled, Vehicle start failure,

If error occurs in Idle - vehicle will switch off

If error occurs during driving - vehicle will run in limp home mode

If error occurs before starting - vehicle will start & run in limp home

Fault Effects (On Vehicle)

Engine stalls & Doesn’t Start.

Lamp Status (If Any)

CE lamp ON after 1 drive cycle

Fault Detection Condition

This fault gets logged when the Crank shaft Sensor signal is implausible to

the vehicle operating condition. Disturbance of crankshaft sensor due to

loose contact, interferences, oscillations

Normal Operating Condition

Crank Shaft Sensor provided plausible signal to EMS ECU.

Probable Trouble Area

Wiring Harness Connections, Sensor, Metallic particles/Burr in Sensor tip or

flywheel teeth, Air gap between Crank Sensor and Fly wheel, Physical

damage to Flywheel

Healing Condition

Engine Running and after 1 drive cycles of fault rectification.

Fault permanent deletion

1. Clear DTC Command form Scan tool

2. Stack Over Flow.

3. 40 warm up cycles.

4. ECU Flashing.

5. ECU Power-Fail

Component Details:

The Circuit decodes the signal given by an inductive based Sensor (Variable Reluctance). Intended target is a wheel

uniformly cut with 60 teeth and 2 teeth removed. The Sensor output signal approximates a sine wave whose

frequency is proportional to engine speed and amplitude is approximately proportional to engine speed. Active edge is

generated from zero crossing point positive to negative transition.

Preliminary Checks:

1. Loose/ Damaged Connections between Sensor and EMS ECU.

2. Check for back out of pins at both Sensor connector and ECU connector.

3. Check for damage of pins at both Sensor connector and ECU connector.

4. Check the continuity from Sensor connector pins to the ECU pins.

5. Physical damage to flywheel.

6. Improper Air Gap between Sensor and Flywheel.