DIAGNOSIS
The engine and emission control system in this vehicle are con-
trolled by ECM. ECM has an On-Board Diagnostic system which
detects a malfunction in this system.
When diagnosing troubles, be sure to have full understanding of
the outline of “On-Board Diagnostic System” and each item in “Pre-
caution in Diagnosing Trouble” and execute diagnosis according
to “Engine Diagnostic Flow Table” in section 6.
ON-BOARD DIAGNOSTIC SYSTEM
ECM performs on-board diagnosis (self-diagnosis) on the system
and operates “CHECK ENGINE” lamp (malfunction indicator lamp)
as follows.
Malfunction indicator lamp (“CHECK ENGINE” light) lights when
the ignition switch is turned ON position (but the engine at stop)
regardless of the condition of Engine and emission control sys-
tem. This is only to check the malfunction indicator lamp
(“CHECK ENGINE” light) bulb and its circuit.
If the areas monitored by ECM is free from any trouble after the
engine start (while engine is running), malfunction indicator
lamp (“CHECK ENGINE” light) turns OFF.
When ECM detects a trouble which has occurred in the areas,
it makes malfunction indicator lamp (“CHECK ENGINE” light)
turn ON while the engine is running to warn the driver of such oc-
currence of trouble and at the same time it stores the exact
trouble area in ECM back-up memory.
PRECAUTIONS IN DIAGNOSING TROUBLES
Before identifying diagnostic trouble code, don’t disconnect cou-
plers from ECM , battery cable from battery, ECM ground wire
harness from engine. Such disconnection will erase memorized
trouble in ECM memory.
Be sure to read “Precautions for Electrical Circuit Service” in
Section 0A before inspection and observe what is written there.
ECM replacement
When substituting a known-good ECM , check for the following
conditions. Neglecting this check may cause damage to known-
good ECM .
– Resistance value of all relays, actuators is as specified re-
spectively.
– TP sensor and MAP sensor are in good condition and none of
power circuits of these sensors is shorted to ground.
ENGINE AND EMISSION CONTROL SYSTEM
6E-11
Содержание GA413
Страница 1: ...99500 76A01 01E 99500 76A01 01E SERVICE MANUAL SERVISE MANUAL...
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Страница 267: ...SYSTEM CIRCUIT ANTILOCK BRAKE SYSTEM ABS OPTIONAL 5E 13...
Страница 277: ...ANTILOCK BRAKE SYSTEM ABS OPTIONAL 5E 23 Fig 1 Fig 2 Fig 3 Fig 5 Fig 4 1 ABS hydraulic unit control module connector...
Страница 414: ...6E 4 ENGINE AND EMISSION CONTROL SYSTEM...
Страница 418: ...6E 8 ENGINE AND EMISSION CONTROL SYSTEM ECM CONNECTORS TERMINAL ARRANGEMENT VIEWED FROM TERMINAL SIDE...
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Страница 600: ...BLANK DIFFERENTIAL 7F 17...
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Страница 672: ...9 36 BODY SERVICE...
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Страница 675: ...BODY SERVICE 9 39 RUST PROOF TREATMENT AREA...
Страница 676: ...9 40 BODY SERVICE...
Страница 752: ...Prepared by Overseas Service Department 1st Ed February 1999 2nd Ed October 2001 Printed in Japan Printing 762...
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Страница 870: ...6 94 ENGINE GENERAL INFORMATION AND DIAGNOSIS GA413 supple Fig 1 for Step 2 Fig 2 for Step 3 Fig 3 for Step 4...
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Страница 991: ...9 4 BODY SERVICE GA413 supple...
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Страница 994: ...BODY SERVICE 9 7 GA413 supple RUST PROOF TREATMENT AREA...
Страница 995: ...9 8 BODY SERVICE GA413 supple...
Страница 998: ...BODY SERVICE 9 11 GA413 supple UNDERBODY DIMENSIONS For van model...
Страница 1000: ...BODY SERVICE 9 13 GA413 supple For truck model...
Страница 1010: ...Prepared by Overseas Service Department 1st Ed October 2000 Printed in Japan Printing October 2000 262...
Страница 1130: ...7E 20 DIFFERENTIAL FRONT 09944 66020 Bearing installer 09951 16060 Lower arm bush remover...
Страница 1131: ...Prepared by Overseas Service Department 1st Ed March 2000 2nd Ed March 2001 Printed in Japan Printing April 2001 122...
Страница 1132: ...SUPPLEMENTARY SERVICE MANUAL FOR 4WD MODEL SUPPLEMENTARY SERVICE MANUAL 99501 76A01 01E 99501 76A01 01E I 20mm...
Страница 1141: ...Tables des mati res K Connecteur 8A 7 4 L Connecteur 8A 7 5 O Connecteur 8A 7 6 Q Connecteur 8A 7 6 Glossaire 8A 8 1...
Страница 1143: ...ndice MEMO Notizen Note Notas...
Страница 1159: ...8A 1 12 MEMO Notizen Note Notas...
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Страница 1246: ...Prepared by 1st Ed July 2002 Printed in Japan 114...