4656 / 5157
/ŵŵŽďŝůŝnjĞƌ ʹ d dƌŽƵďůĞƐŚŽŽƚŝŶŐ ĂƚĂ
sĞƌƐŝŽŶ͗ ϭ͘
2
ĂƚĞ͗
03-June-2014
Prepared Author
:
6DUDQJ . 0LWKLSDWL 3
Review & approved by
: R A Rode (ERC-E&E)
Page: 29 of 67
Copyright ©
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.
P0604 - 00:- Internal Control Module Random Access Memory (RAM) Error
Overview:
ISO Code
P0604 - 00
Customer Symptom
None
Fault Effects (On Vehicle)
N/A
Lamp Status (If Any)
None
Fault Detection Condition
Memory integrity check for RAM
Normal Operating Condition
Normal operating range:
ECU will be awake from 6V to 16 V.
Full assistance is b/w 11.5 to 16 volts.
Reduced assistance is b/w 9 to 11.5 V
Probable Trouble Area
VICM internal damage
Healing Condition
N/A
Component Details:
,PPRELOL]HU V\VWHP LV GHVLJQHG WR SUHYHQW YHKLFOH WKHIW E\ HOHFWURQLFDOO\ GLVDEOLQJ WKH HQJLQH VWDUWLQJ V\VWHP 7KH
HQJLQH FDQ EH VWDUWHG RQO\ ZLWK YHKLFOH¶V RULJLQDO LPPRELOL]HU LJQLWLRQ NH\ ZKLFK KDV DQ HOHFWURQLF LGHQWLILFDWLRQ
SURJUDPPHG FRGH ,PPRELOL]HU XQLW LV DQ DGG RQ SDUW RQ WKH LJQLWLRQ VZLWFK ILWWHG RQ WKH VWHHULQJ FROXPQ 7KH
HQJLQH FDQ EH VWDUWHG RQO\ ZLWK WKH YHKLFOH¶V RULJLQDO LPPRELOL]HU LJQLWLRQ NH\ 7KH HOHFWURQLF NH\ FRPPXQLFDWHV
WKH LGHQWLILFDWLRQ FRGH WR ,&8 ZKHQ WKH NH\ LV WXUQHG WR WKH ,JQLWLRQ 21 SRVLWLRQ
Preliminary Checks:
1. Voltage at the battery terminals should be greater than 11.5V.
2. VICM power supply connector should have greater than 11.5V for full assistance.
3. Check battery cable and VICM connector terminals for damage.
4. Check VICM ECU for pin bend/damage.
5. Alternator output voltage should be between 13.5 V to 14.5 V in engine running condition.