Mitsubishi Lancer Evolution 8 MR. Manual - part 18

 

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Mitsubishi Lancer Evolution 8 MR. Manual - part 18

 

 

MANUAL TRANSMISSION  - TROUBLESHOOTING

22-10

Code No.51 Longitudinal G sensor system

Assumed cause of concern

Code No.51 is output when the longitudinal G sensor signal
falls below 0.5V or rises above 4.5V.

• Harness, connector malfunction
• Longitudinal G sensor malfunction
• ABS-ECU malfunction <AYC fitted vehicles>
• 4WD-ECU malfunction

Remarks

*2

: refer to ’01-1 Lancer Evolution VII Service Manual (No.1036K02)

MUT-II/III Service data
• No.14 longitudinal G sensor power voltage

OK: P.22-32 Refer to (Service Data List)

*2

OK -> Intermittent malfunction

Measurement at D-29 longitudinal G sensor connector
• Undo connector and measure on harness side
• Ignition switch: ON
(1) Voltage between 1 - earth

OK: battery voltage

(2) Resistance between 3 – earth

OK: 2

Ω

or less

D-29

Harness side 

connector

• Remove longitudinal G sensor
• Connect the special tool between D-29 longitudinal 

G sensor connector harness side connector and
longitudinal G sensor.

• Ignition switch: ON
• Voltage between 2 – body earth (when longitudinal 

G sensor is set on a flat surface)
OK: 2.4 – 2.6V

• Voltage between 2 – body earth (when longitudinal 

G sensor is placed so that the label surface faces
sideways)
OK: 3.3 – 3.7V 

Connector check: D-29, C-38, C-20, B-109 <ACD +
AYC fitted vehicles> D-29, C-20, C-38 <ACD fitted
vehicles>
NG -> repair

Check harness between longitudinal G sensor – 4WD-
ECU
• Check for broken output wire, earth, damage
Check harness between longitudinal G sensor – ABS-
ECU <ACD+AYC fitted vehicles>
• Check output wire for earth, damage
NG -> repair

Connector check: D-29, C-212, C-210
NG -> repair

Check harness between longitudinal G sensor –
ignition switch.
• Check for broken power supply wire,  earth, damage
• NG -> repair

Connector check: D-29, C-20, B-109 <ACD + AYC
fitted vehicles>  D-29, C-20, C-38, <ACD-fitted vehicles>
NG -> repair 

Check harness between longitudinal G sensor – ABS-
ECU <ACD+AYC fitted vehicles>
• Check to see if earth wire broken or damaged
NG -> repair
Check harness between longitudinal G sensor – 4WD-
ECU <ACD fitted vehicles>
• Check to see if earth wire broken or damaged
NG -> repair

MUT-II/III Service data
• No.14 longitudinal G sensor voltage

OK: Refer to P.22-32 (Service Data List)

*2

NG -> Refer to Group 35C – Troubleshooting

*2

<ACD+AYC fitted vehicles> or 4WD-ECU <ACD fitted
vehicles> Replace
OK -> intermittent malfunction

Replace longitudinal G sensor

MUT-II/III Service data
• No.14 longitudinal G sensor voltage

OK: Refer to P.22-32 (Service Data List)

*2

NG -> Refer to Group 35C – Troubleshooting

*2

<ACD+AYC fitted vehicles> or 4WD-ECU <ACD fitted
vehicles> Replace
OK -> intermittent malfunction

label

label

OK

NG

(1) NG

NG

(2) NG

OK

OK

OK

OK

OK

OK

MANUAL TRANSMISSION  - TROUBLESHOOTING

22-11

Code No.52 Longitudinal G sensor system

Assumed cause of concern

At 10kph or over, with ABS and brakes not applied, code No.
52 is output in cases where G sensor indicates higher than
specified value.

• Harness, connector malfunction
• Longitudinal G sensor malfunction
• ABS-ECU malfunction <ACD+AYC fitted vehicles>
• 4WD-ECU malfunction

Remarks

*2

: refer to ’01-1 Lancer Evolution VII Service Manual (No.1036K02)

MUT-II/III Service data
• No.14 longitudinal sensor voltage

OK: P.22-32 Refer to (Service Data List)

*2

OK -> Intermittent malfunction

Longitudinal G sensor check (refer to P.22-32)

*2

NG -> replace

Measurement at C-38 4WD-ECU connector
• ECU terminal voltage measurement
• Ignition switch: ON
• Voltage between 23 – earth

OK: 2.4 – 2.6V (when vehicle is standing on flat
ground)

Connector check: C-38
NG -> repair

MUT-II/III Service data
• No.14 longitudinal sensor voltage

OK: P.22-32 Refer to (Service Data List)

*2

NG -> Replace 4WD-ECU
OK -> Intermittent malfunction

Connector check: C-38, D-29, C-20, B-109
<ACD+AYC fitted vehicles>  C-38,  C-20, D-29 <ACD
fitted vehicles> 
NG -> repair

Check harness between longitudinal G sensor – 4WD-
ECU
• Check to see if output wire is broken, earth, or

damaged

Check harness between longitudinal G sensor – ABS-
ECU
<ACD+AYC fitted vehicles>
• Check to see if output wire earth or damaged
NG -> repair

MUT-II/III Service data
• No.14 longitudinal G sensor voltage

OK: Refer to P.22-32 (Service Data List)

*2

NG -> Refer to Group 35C – Troubleshooting

*2

<ACD+AYC fitted vehicles> or replace 4WD-ECU
OK -> intermittent malfunction

NG

OK

OK

OK

NG

OK

OK

MANUAL TRANSMISSION  - TROUBLESHOOTING

22-12

Code No.56 Longitudinal G sensor system

Assumed cause of concern

Code No.56 is output when the longitudinal G sensor signal
falls below 0.5V or rises above 4.5V.

• Harness, connector malfunction
• Longitudinal G sensor malfunction
• ABS-ECU malfunction <ACD+AYC fitted vehicles>
• 4WD-ECU malfunction

Remarks

*2

: refer to ’01-1 Lancer Evolution VII Service Manual (No.1036K02)

MUT-II/III Service data
• No.15 longitudinal G sensor power voltage

OK: P.22-32 Refer to (Service Data List)

*2

OK -> Intermittent malfunction

Measurement at D-31 lateral G sensor connector
• Undo connector and measure on harness side
• Ignition switch: ON
(1)Voltage between 1 - earth

OK: battery voltage

(2)Resistance between 3 – earth

OK: 2

Ω

or less

D-29

Harness side 

connector

• Remove longitudinal G sensor
• Connect the special tool between D-31 longitudinal 

G sensor connector harness side connector and
longitudinal G sensor.

• Ignition switch: ON
• Voltage between 2 – body earth (when longitudinal 

G sensor is set on a flat surface)
OK: 2.4 – 2.6V

• Voltage between 2 – body earth (when longitudinal 

G sensor is placed so that the label surface faces
sideways)
OK: 3.3 – 3.7V 

Connector check: D-31, C-38, C-20, B-109 <ACD +
AYC fitted vehicles> D-31, C-20, C-38 <ACD fitted
vehicles>
NG -> repair

Check harness between lateral G sensor – 4WD-ECU
• Check for broken output wire, earth, damage
Check harness between lateral G sensor – ABS-ECU
<ACD+AYC fitted vehicles>
• Check output wire for earth, damage
NG -> repair

Connector check: D-31, C-212, C-210
NG -> repair

Check harness between lateral G sensor – ignition
switch.
• Check for broken power supply wire,  earth, damage
NG -> repair

Connector check: D-31, C-20, B-109 <ACD + AYC
fitted vehicles>  D-31, C-20, C-38, <ACD-fitted
vehicles>
NG -> repair 

Check harness between lateral G sensor – ABS-ECU
<ACD+AYC fitted vehicles>
• Check to see if earth wire broken or damaged
Check harness between lateral G sensor – 4WD-ECU
<ACD fitted vehicles>
• Check to see if earth wire broken or damaged
NG -> repair

MUT-II/III Service data
• No.15 lateral G sensor voltage

OK: Refer to P.22-32 (Service Data List)

*2

NG -> Refer to Group 35C – Troubleshooting

*2

<ACD+AYC fitted vehicles> or 4WD-ECU <ACD fitted

vehicles> Replace

OK -> intermittent malfunction

Replace lateral G sensor

MUT-II/III Service data
• No.15 longitudinal G sensor voltage

OK: Refer to P.22-32 (Service Data List)

*2

NG -> Refer to Group 35C – Troubleshooting

*2

<ACD+AYC fitted vehicles> or 4WD-ECU <ACD fitted
vehicles> Replace
OK -> intermittent malfunction

label

label

(1) NG

NG

OK

(2) NG

NG

OK

OK

OK

OK

OK

OK

MANUAL TRANSMISSION  - TROUBLESHOOTING

22-13

Code No.57 Lateral G sensor system

Assumed cause of concern

At 10kph or over, with ABS and brakes not applied, code No.
57 is output in cases where G sensor indicates higher than
specified value.

• Harness, connector malfunction
• Longitudinal G sensor malfunction
• ABS-ECU malfunction <ACD+AYC fitted vehicles>
• 4WD-ECU malfunction

Remarks

*2

: refer to ’01-1 Lancer Evolution VII Service Manual (No.1036K02)

MUT-II/III Service data
• No.15  longitudinal sensor voltage

OK: P.22-32 Refer to (Service Data List)

*2

OK -> Intermittent malfunction

Lateral G sensor check (refer to P.22-20)

*2

NG -> replace

Measurement at C-38 4WD-ECU connector
• ECU terminal voltage measurement
• Ignition switch: ON
• Voltage between 11 – earth

OK: 2.4 – 2.6V (when vehicle is standing on flat
ground)

Connector check: C-38
NG -> repair

MUT-II/III Service data
• No.15 lateral sensor voltage

OK: P.22-32 Refer to (Service Data List)

*2

NG -> Replace 4WD-ECU
OK -> Intermittent malfunction

Connector check: C-38, D-31, C-20, B-109
<ACD+AYC fitted vehicles>  C-38,  C-20, D-31 <ACD
fitted vehicles> 
NG -> repair

Check harness between lateral G sensor – 4WD-ECU
• Check to see if output wire is broken, earth, or

damaged

Check harness between lateral G sensor – ABS-ECU
• Check to see if output wire earth or damaged
NG -> repair

MUT-II/III Service data
• No.15 lateral G sensor voltage

OK: Refer to P.22-32 (Service Data List)

*2

NG -> Refer to Group 35C – Troubleshooting

*2

<ACD+AYC fitted vehicles> or replace 4WD-ECU
OK -> intermittent malfunction

NG

NG

OK

OK

OK

OK

OK

 

 

 

 

 

 

 

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