87B-38
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
*RF: radio frequencyDF054
PRESENT
OR
STORED
COMPUTER
The radiofrequency receiver inside the UCH computer does not work
1.DEF : Internal electronic fault
NOTESConditions for applying the fault finding procedure to stored faults:
–The fault is declared present after the ignition has been switched on.
If the fault is stored, switch off the ignition and check the F8 (15A) fuse of the UCH supply (component
code 645) on the passenger compartment fuse and relay box (component code 1016).
–Replace the fuse if necessary, clear the fault and switch on the ignition again.
–Request locking and then unlocking, then start the engine.
Check for + after ignition feed on connections AP43, BP15, APT, BP6, BP13, BP19, SP2, SP15 of
component 645.
Check for + 12 V accessories feed on connections SP2 and SP15 of component 645.
Check for earth on connections MAN and NAM of component 645.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check that status ET045 “RF* signal received” is “Yes” by pressing the locking button on the key, if when
pressing the status is “No” check the battery and the conformity of the key.
If the fault does not reappear, switch the lighting, wipers, vehicle locking and climate control request controls on
and off several times, then read the faults again.
If the fault is still present. Do not operate on the computer, contact Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF054
87B-39
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
DF062
PRESENT
OR
STOREDSTARTER RELAY CONTROL CIRCUIT
CC.1 : Short circuit to + 12 volts
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after the starter is activated.
WARNING
When activating the starter, none of the gears must be engaged
(and the parking brake must be applied).
Check that fuse F9 (15 A) is sound and correctly fitted in the passenger compartment fuse and relay box
(component code 1016) and relay A (20 A) in the engine fuse and relay box (component code 597).
Replace the fuse if necessary.
Check the condition and connection of the UCH 24-track connector PE1 (component code 645) (tabs bent,
oxidised or broken).
Check the condition and connection of the starter relay 4-track black connector (tabs bent, oxidised or broken).
With the starter activated, check for + 12 V on connection 1B of component 645.
With the starter activated, check for + 12 V on connection AP29 of component 232.
Check the insulation, continuity and absence of interference resistance of the following connections:
Starter relay check:
●Connection code 1B between components 232 and 645.
●Connection code 1A between components 232 and 163.
●Connection code D between components 232 and 104.
●Connection code AP23 between components 232 and 1016.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the connections are correct, replace the starter relay (component code 232). (See MR 411 Mechanical
systems 16A, Starting - Charging, Starting system: Identification).
If the connections and the relay are correct, check the starter (component code 163). (See MR 411 Mechanical
systems 16A, Starting - Charging, Starting system: Identification).
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF062
87B-40
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
* SR: SunroofDF065
PRESENT
OR
STORED
ELECTRIC WINDOWS AUTHORISATION CONNECTION
CC.1 : Short circuit to + 12 volts
NOTESConditions for applying fault finding procedures to stored faults:
The fault is declared present after:
The ignition is switched of f and back on again after pressing the driver's one-touch
electric window switch or sunroof switch if the vehicle is fitted with a sunroof.
For vehicles fitted with sunroof (component code 1578):
Check that the vehicle is configured with One-touch window(s) S.R*. :
Check that LC070 One-touch window(s) S.R. is With. Otherwise use CF173
One-touch window(s) S.R.
Check the condition and connection of the UCH 24-track connector PE2 (component code 645) (tabs bent,
oxidised or broken).
Check the condition and connection of the driver's electric window motor 6-track connector (bent, oxidised,
broken tabs).
If there is an electric sunroof, check that fuse F26 (20 A) is sound and correctly fitted in the passenger
compartment fuse and relay box (component 1016).
Replace the fuse if necessary.
If there is an electric sunroof, check the condition and connection of the A-pillar 4-track connector 339 and of
sunroof computer connector AA (tabs bent, oxidised, broken).
Check the insulation, continuity and absence of interference resistance of the following connections:
●Connection code 21K between components 203 and 645.
●Connection code MAM between component 203 and earth MAM.
For vehicles fitted with a sunroof:
●Connection code 21K between components 1579 and 645.
●Connection code MAM between component 1579 and earth MAM.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the fault is still present, switch on the ignition and check for 0 V on connection 21K if no (see 87D
electric windows - Sunroof).
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF065
87B-42
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
With automatic headlighting:DF087
PRESENT
OR
STORED
SIDE LIGHTS RELAY CONTROL CIRCUIT
CC.1 : Short circuit to + 12 volts
CC.0 : Open circuit or short circuit to earth
NOTESConditions for applying the fault finding procedure to stored faults:
The fault reappears after:
The ignition is switched on and the side lights are activated.
OR
Running AC055 Side lights
Note:
This fault only appears on vehicles fitted with automatic headlighting.
Check for the rain/light sensor (component code 1415) then use the diagnostic tool
to check:
–Check that LC044 "Rain/light sensor" displays "Present". If not, carry out
CF035 "Rain/light sensor".
–Check that LC095 "Automatic headlight function", displays "With". If not, carry
out CF193 "Automatic headlight function".
–Check that LC096 "Automatic wiper function" displays "With". If not, carry out
CF194 "Automatic headlight function".
Check that fuses F14 (20 A), F15 (5 A), F25 (5 A), F39 (10 A), F40 (5 A), F42 (10 A) and F43 (10 A) are sound
and correctly fitted in the passenger compartment fuse and relay box (component code 1016).
Replace the fuse(s) if necessary.
Check the presence and condition of the side light relays (component code 289) (20A) and 1034 (20A).
Replace the side light relay (component code 289) if necessary.
Check the condition and connection of the light concerned (bent, oxidised, broken tabs).
Check the condition and connection of the 40-track connectors PE1 and PE2 of the UCH (component code 645)
(tabs broken, bent or oxidised).
Check the condition and connection of the horn and lights switch connector (component code 209) (tabs bent,
oxidised, broken).
Check for the + 12 V (when requesting the side lights) on connection LPD of component 184 and on
connection LPG of component 185. Check for the earth on connection MAR of component 184 and on
connection MAS of component 185.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF087
87B-44
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
DF087
CONTINUED 2
Checking the monolever (component code 209):
Check the insulation, continuity and the absence of interference resistance on the following connections:
Check between the monolever (component code 209) and the UCH:
●Connection code 78B between components 645 and 209.
Check between the monolever (component code 209) and the passenger compartment fuse and relay box
(component code 1016):
●Connection code BPA2 between components 1016 and 209.
●Connection code BPA3 between components 1016 and 209.
●Connection code BPA4 between components 1016 and 209.
●Connection code MAN or MAM between component 209 and earth MAN or MAM (depending on the driving
layout, right- or left-hand drive).
Check for + 12 V on connections BPA2 and BPA3 of component 209. Check for earth on connection MAM
(for right-hand drive vehicles) or MAN (for left-hand drive vehicles) of component 209.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the feeds, earth and connections are correct, replace the monolever (component code 209). (See MR 411
Mechanical systems 84A, Controls - Signals, Lighting and signals switch:
Removal - Refitting)
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
87B-45
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
With automatic headlighting:DF088
PRESENT
OR
STORED
DIPPED BEAM HEADLIGHTS RELAY CONTROL CIRCUIT
CC.1 : Short circuit to + 12 volts
CC.0 : Open circuit or short circuit to earth
NOTESConditions for applying the fault finding procedure to stored faults:
The fault reappears after:
The ignition is switched on and the side lights are activated.
OR
Running AC054 Dipped headlights
Note:
This fault only appears on vehicles fitted with automatic headlighting.
Check for the rain/light sensor (component code 1415) then:
–Check that the vehicle has a rain/light sensor (component code 1415).
–Check that LC044 "Rain/light sensor" displays "Present". If not, carry out
CF035 "Rain/light sensor".
–Check that LC096 "Automatic wiper function" displays "With". If not, carry out
CF194 "Automatic wiper function".
–Check that LC095 "Automatic headlight function", displays "With". If not, carry
out CF193 "Automatic headlight function".
Check that fuses F13 (30A), F15 (5A), F25 (5 A), F34 (15 A) and F35 (15 A) are sound and correctly fitted in the
passenger compartment fuse and relay box (component code 1016).
Replace the fuse if necessary.
Check the presence and condition of the dipped headlights relay (component code 281) (20A).
Replace the dipped headlights relay (component code 281) if necessary.
Check the correct positioning and condition of the bulb concerned.
Replace the light if necessary.
Check the condition and connection of the light concerned (bent, oxidised, broken tabs).
Check the condition and connection of the UCH 40-track connector PE2 (component code 645) (tabs bent,
oxidised or broken).
Check the condition and connection of the horn and lights switch connector (component code 209) (tabs bent,
oxidised, broken).
If the connector is faulty and there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF088
87B-47
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
DF088
CONTINUED 2
Checking the monolever (component code 209):
Check the insulation, continuity and the absence of interference resistance on the following connections:
Check between the monolever (component code 209) and the UCH:
●Connection code 78Q between components 645 and 209.
Check between the monolever (component code 209) and the passenger compartment fuse and relay box
(component code 1016):
●Connection code BPA3 between components 1016 and 209.
●Connection code MAN or MAM between component 209 and earth MAN or earth MAM (depending on the
driving layout, right- or left-hand drive).
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for + 12 V on connections BPA2 and BPA3 of component 209.
Check for earth on connection MAM (for right-hand drive vehicles) or MAN (for left-hand drive vehicles) of
component 209.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the feeds, earth and connections are correct, replace the monolever (component code 209). (See MR 411
Mechanical systems 84A, Controls - Signals, Lighting and signals switch:
Removal - Refitting)
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
87B-48
MR-413-X44-87B000$384.mif
V5
PASSENGER COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
UCH
Vdiag No.: 44
87B
DF097
PRESENT
OR
STOREDWINDSCREEN WIPER PARK POSITION CIRCUIT
1.DEF : Open circuit or short circuit to earth
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after the ignition is switched off and back on and the front
wipers are operated from the wiping stalk.
This fault may appear if the windscreen wiper motor is forced (e.g.: used on a dry screen, snow on the screen,
etc.).
Check that fuse F2 (15 A) is sound and correctly fitted to the passenger compartment fuse and relay box
(component code 1016).
Replace the fuse if necessary.
Check the condition and connection of the 5-track windscreen wiper motor connector (OR) (component code
212) (broken, bent, oxidised tabs).
Check the condition and connection of the 40-track connectors PE1, PE2 and PE3 of the UCH (component
code 645) (tabs broken, bent or oxidised).
Check that the earth on connection MAS of the windscreen wiper motor connector (component code 212) is
correct.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Activate low speed, check for + 12 V on connections 14B of the windscreen wiper motor
connector (component code 212). Activate the high speed, check for + 12 V on connection 14A of the
windscreen wiper motor connector (component code 212).
If there is no + 12 V, check the insulation, continuity and the absence of interference resistance on the
following connections:
Check the combined wiper-washer:
●Connection code AP71 between components 145 and 1016.
●Connection code 14E (windscreen wiper timed control) between components 645 and 145.
●Connection code 14G (low speed windscreen wiper control) between components 645 and 145.
●Connection code 14H (high speed windscreen wiper control) between components 645 and 145.
●Connection code MAN (left-hand drive or MAN (right-hand drive) between component 145 and the earth
MAN (left-hand drive) or MAM (right-hand drive).
AFTER REPAIRCarry out another fault finding check on the system.
Clear the stored faults.
Deal with any other faults.
UCH_V44_DF097