Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition
VOLVO Model: 850 2,O 850 2,3/2,5 850 2,5 20V 960 2,5/3,0 Year: 1990-95 I Engine management Engine code: B5202S, B5204T, B5234T, B5234T4, B5234T5, B5252S, B5254S, B6254F, B6304F System: Bosch Motronic 1.8 Bosch Motronic 4.3 Siemens Fenix 5.2 I 850 - engine bay, RH front 960 - engine bay, LH rear General information Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults. Trouble codes are displayed by the LED on the data link connector (DLC). The ECM fault memory can also be checked and erased using diagnostic equipment connected to the data link connector (DLC). Accessing Ensure ignition switched OFF. Open cover on black data link connector (DLC). Insert selector cable in socket 2 [I]. Switch ignition ON. Depress test button for approximately 1 second rn [2]. Count LED flashes rn 131. Note trouble code. Each trouble code consists of three groups of flashes m. A 3 second pause separates each group H [A]. For example: Trouble code 223 displayed - idle air control (IAC) valve. Repeat switch operation rn 121. Note trouble codes. Compare with trouble code table. Switch ignition OFF. Rectify faults as necessary.
I Engine management Erasing Ensure ignition switched OFF. Insert selector cable in socket 2 Access trouble codes. [I]. NOTE: Trouble codes must be displayed at least once before they can be erased. Depress test button for approximately 5 seconds. Release test button. Wait for LED to illuminate. Depress test button for approximately 5 seconds. Release test button. Depress test button for approximately 1 second. Ensure trouble code 111 displayed. Trouble code identification Flash type I Fault location 111 I No fault found 112 I Engine control module (ECM) ECM Probable cause 113 I Early models: Injector(s) Wiring, fuse, injector(s) Late models: Injectors 1, 2 & 4 113 1993: Short term fuel trim 1994 +: Short term fuel trim - upper limit reached Injectors 3, 5 & 6 lnjector 1 Mass air flow (MAF) sensor/manifold absolute pressure (MAP) sensor Intake air temperature (IAT) sensor Engine coolant temperature (ECT) sensor lnjector 2 Engine speed (RPM) sensor - no signal Wiring, fuse, injector(s) No vacuum to MAP sensor, HO2Slsignal short to earth, MAP sensorlearth wire Wiring, H02S -- - -- Wiring, fuse, injector(~) Wiring, injector Wiring, hose connection, MAFIMAP sensor Wiring, IAT sensor wiring,~~~ sensor Wiring, injector Wiring, RPM sensor 132 I Engine control module (ECM) - supply voltage lowlhigh Battery, alternator 135 Injector 3 Wiring, injector 143 Knock sensor (KS) 1 Wiring, KS 145 I lniector 4 Wiring, injector 152 I Secondary air injection (AIR) solenoid Wiring, AIR solenoid 153 I Heated oxygen sensor (H02S) 2 Wiring, heating inoperative, HO2S Exhaust gas recirculation (EGR) system - excessive flow Wiring, EGR valve, EGR control module, engine 154 1 detected coolant thermostat 155 I Injector 5 Wiring, injector 212 I Heated oxygen sensor (H02S) 1 Wiring, heating inoperative, MAF sensor, HO2S 214 1 Engine speed (RPM) sensor - intermittent signal Wiring, flywheelldrive plate damaged, air gap, RPM sensor 221 I Long term fuel trim, part load - upper limit reached I 222 Engine control relay /Autodata -- lntakelexhaust leak, fuel pressure low, injector(s) blocked, hose connection, wiring, MAFIMAP sensor, ECT sensor, H02S Wiring, engine control relay 4 f811 1 Engme management -
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- Page 799 and 800: Model: SN40 1,6/1,8/1,9/2,0 SN40 1,
- Page 801 and 802: V70 2,4ITurbo C70 2,O Turbo C70 2,3
- Page 803 and 804: Model: S60 2,012,3 Turbo S60 2,4lTu
- Page 805 and 806: I I Model: S60 2,012,3 Turbo S60 2,
- Page 807 and 808: Model: 240 2,012,3 740 2,012,3 7401
- Page 809: 940 2,OITurbo 9401960 2,0/2,3ITurbo
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I<br />
Engine management<br />
Erasing<br />
Ensure ignition switched OFF.<br />
Insert selector cable in socket 2<br />
Access trouble codes.<br />
[I].<br />
NOTE: <strong>Trouble</strong> codes must be displayed at least once before<br />
they can be erased.<br />
Depress test button for approximately 5 seconds.<br />
Release test button.<br />
Wait for LED to illuminate.<br />
Depress test button for approximately 5 seconds.<br />
Release test button.<br />
Depress test button for approximately 1 second.<br />
Ensure trouble code 111 displayed.<br />
<strong>Trouble</strong> code identification<br />
Flash type I <strong>Fault</strong> location<br />
111 I No fault found<br />
112 I Engine control module (ECM) ECM<br />
Probable cause<br />
113 I Early models: Injector(s) Wiring, fuse, injector(s)<br />
Late models: Injectors 1, 2 & 4<br />
113 1993: Short term fuel trim<br />
1994 +: Short term fuel trim - upper limit reached<br />
Injectors 3, 5 & 6<br />
lnjector 1<br />
Mass air flow (MAF) sensor/manifold absolute pressure<br />
(MAP) sensor<br />
Intake air temperature (IAT) sensor<br />
Engine coolant temperature (ECT) sensor<br />
lnjector 2<br />
Engine speed (RPM) sensor - no signal<br />
Wiring, fuse, injector(s)<br />
No vacuum to MAP sensor, HO2Slsignal short to<br />
earth, MAP sensorlearth wire<br />
Wiring, H02S<br />
-- - --<br />
Wiring, fuse, injector(~)<br />
Wiring, injector<br />
Wiring, hose connection, MAFIMAP sensor<br />
Wiring, IAT sensor<br />
wiring,~~~ sensor<br />
Wiring, injector<br />
Wiring, RPM sensor<br />
132 I Engine control module (ECM) - supply voltage lowlhigh Battery, alternator<br />
135 Injector 3<br />
Wiring, injector<br />
143 Knock sensor (KS) 1<br />
Wiring, KS<br />
145 I lniector 4<br />
Wiring, injector<br />
152 I Secondary air injection (AIR) solenoid<br />
Wiring, AIR solenoid<br />
153 I Heated oxygen sensor (H02S) 2<br />
Wiring, heating inoperative, HO2S<br />
Exhaust gas recirculation (EGR) system - excessive flow Wiring, EGR valve, EGR control module, engine<br />
154 1 detected<br />
coolant thermostat<br />
155 I Injector 5<br />
Wiring, injector<br />
212 I Heated oxygen sensor (H02S) 1 Wiring, heating inoperative, MAF sensor, HO2S<br />
214 1 Engine speed (RPM) sensor - intermittent signal Wiring, flywheelldrive plate damaged, air gap,<br />
RPM sensor<br />
221 I Long term fuel trim, part load - upper limit reached<br />
I<br />
222 Engine control relay<br />
/<strong>Autodata</strong><br />
--<br />
lntakelexhaust leak, fuel pressure low, injector(s)<br />
blocked, hose connection, wiring, MAFIMAP sensor,<br />
ECT sensor, H02S<br />
Wiring, engine control relay<br />
4<br />
f811 1<br />
Engme management<br />
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