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ELECTRICAL
FUEL INJECTION SYSTEM
Error Code No. P0122, P0123
Error Code
P0122
System or Component
Throttle Position Sensor (TPS)
Detail of Error
TPS Circuit Low Voltage or Open
Engine Symptoms
• Poor engine start (There is possibility it can’t start)
• Poor driveability
• Deteriorated exhaust
• Unstable engine idling (Different idling engine rpm)
• Limited engine performance
Engine Running availability
Able to run engine
DIAG Tool Code
Mode “DIAG”, Code “TPS”
Diagnosing
• Confirm throttle position on FI diagnostic tool display when throttle
valve is fully opened.
MX825V: 95–100 %
MX800V: 67–77 %
MX775V: 54–64 %
• Confirm throttle position on FI diagnostic tool display when throttle
valve is fully closed.
MX825/800/775V: 0–5 %
• Confirm throttle position on display changes smoothly with throttle
valve open and close.
Probable Cause
• Malfunction in wire harness and coupler between sensor and ECU
• Low voltage or open in wire harness between sensor and ECU
• Malfunction in sensor unit
• Malfunction in ECU
Error Code
P0123
System or Component
Throttle Position Sensor (TPS)
Detail of Error
TPS Circuit High Voltage
Engine Symptoms
• Poor engine start (There is possibility it can’t start)
• Poor driveability
• Deteriorated exhaust
• Unstable engine idling (Different idling engine rpm)
• Limited engine performance
Engine Running availability
Able to run engine
DIAG Tool Code
Mode “DIAG”, Code “TPS”
Diagnosing
• Confirm throttle position on FI diagnostic tool display when throttle
valve is fully opened.
MX825V: 95–100 %
MX800V: 67–77 %
MX775V: 54–64 %
• Confirm throttle position on FI diagnostic tool display when throttle
valve is fully closed.
MX825/800/775V: 0–5 %
• Confirm throttle position on display changes smoothly with throttle
valve open and close.
Probable Cause
• Malfunction in wire harness and coupler between sensor and ECU
• Low voltage or open in wire harness between sensor and ECU
• Malfunction in sensor unit
• Malfunction in ECU
Summary of Contents for MX775
Page 2: ...7UD F8197 E0_Cover indd 2 2016 12 13 11 23 58 ...
Page 8: ...MEMO ...
Page 24: ...SPECIAL TOOLS AND TESTERS 1 12 1 2 3 4 5 6 7 8 9 10 GENERAL INFORMATION MEMO ...
Page 101: ...4 5 1 2 3 4 5 6 7 8 9 10 FUEL FUEL PUMPS sure fuel pump joint until a distinct click is heard ...
Page 172: ...7 14 1 2 3 4 5 6 7 8 9 10 SPECIFICATIONS WIRE ROUTING DIAGRAM ...
Page 174: ...7 16 1 2 3 4 5 6 7 8 9 10 SPECIFICATIONS WIRE ROUTING DIAGRAM LEFT SIDE VIEW ...
Page 176: ...7 18 1 2 3 4 5 6 7 8 9 10 SPECIFICATIONS WIRE ROUTING DIAGRAM RIGHT SIDE VIEW ...
Page 180: ...7 22 1 2 3 4 5 6 7 8 9 10 SPECIFICATIONS WIRE ROUTING DIAGRAM REAR SIDE VIEW ...
Page 183: ...7 25 1 2 3 4 5 6 7 8 9 10 SPECIFICATIONS WIRE ROUTING DIAGRAM MEMO ...
Page 186: ...MEMO ...
Page 187: ...7UD F8197 E0_Cover indd 2 2016 12 13 11 23 58 ...