Mack DTC

MACK Truck Fault Codes DTC

4 Engine Oil Pressure Low Voltage / Open 1 1 P 100 4 128/143

4 Engine Oil Pressure High Voltage 1 1 P 100 3 128/143

9 Barometric Pressure Low Voltage / Open 1 2 P 108 4 128

9 Barometric Pressure High Voltage 1 2 P 108 3 128

4 Fuel Temperature Low Voltage 1 3 P 174 4 128/143

4 Fuel Temperature High Voltage 1 3 P 174 3 128/143

4 Fuel Temperature Current Low/Open 1 3 P 174 5 128/143

5 Ambient Temperature Low Voltage 1 4 P 171 4 128

5 Ambient Temperature High Voltage 1 4 P 171 3 128

5 Ambient Temperature Current Low / Open 1 4 P 171 5 128

+ Cab Interior Temperature Low Voltage 1 5 P 170 4 142

+ Cab Interior Temperature High Voltage / Open 1 5 P 170 3 142

4 Starter Input High Voltage 1 6 S 237 3 142

4 Coolant Level High Voltage / Open 1 7 P 111 3 128/143

9 Coolant Level “Add” Sensor High Voltage / Open

1 7 P 111 5 128

8! Est. % Fan Speed Above Normal Op. Range 1 8 P 26 0 128

8! Est. % Fan Speed Below Normal Op. Range 1 8 P 26 1 128

9 Heated Oxygen Sensor - UEGO 1 9 S 65 128

9 Aux. Cooling Relay Output 1 10 128

4 Engine Coolant Temp. Low Voltage 2 1 P 110 4 128/143

4 Engine Coolant Temp. High Voltage 2 1 P 110 3 128/143

4 Engine Coolant Temp. Current Low / Open 2 1 P 110 5 128/143

7 Engine Coolant Temp. Abnormal Rate of Change 2 1 P 110 10 128

* Inlet Air Pressure Low Voltage / Open 2 2 P 106 4 128/143

4 Boost Pressure Low Voltage / Open 2 2 P 102 4 128/143

* Inlet Air Pressure High Voltage 2 2 P 106 3 128/143

4 Boost Pressure High Voltage 2 2 P 102 3 128/143

9 Boost Pressure - Extended Low Voltage / Open 2 2 P 439 4 128

9 Boost Pressure - Extended High Voltage 2 2 P 439 3 128

4 Intake Manifold Temp. Low Voltage 2 3 P 105 4 128/143

4 Intake Manifold Temp. High Voltage 2 3 P 105 3 128/143

4 Intake Manifold Temp. Current Low / Open 2 3 P 105 5 128/143

5 Transmission Oil Temp. Low Voltage 2 4 P 177 4 142

5 Transmission Oil Temp. High Voltage / Open 2 4 P 177 3 142

5 F.R. Axle Oil Temperature Low Voltage 2 5 P 77 4 142

5 F.R. Axle Oil Temperature High Voltage / Open 2 5 P 77 3 142

5 R.R. Axle Oil Temperature Low Voltage 2 6 P 78 4 142

5 R.R. Axle Oil Temperature High Voltage / Open 2 6 P 78 3 142

5 Engine Oil Temperature Low Voltage 2 7 P 175 4 128

5 Engine Oil Temperature High Voltage 2 7 P 175 3 128

5 Engine Oil Temperature Open 2 7 P 175 5 128

9 Combustion Air Temperature Low Voltage 2 8 P 172 4 128

9 Combustion Air Temperature High Voltage 2 8 P 172 3 128

9 Combustion Air Temperature Current Low/Open 2 8 P 172 5 128

9 Combustion Air Humidity TBD 2 9 TBD 128

9 Inlet Air Pre-cleaner Output TBD 2 10 TBD 128

5 Exhaust Temperature Low Voltage 3 1 P 173 4 142

5 Exhaust Temperature High Voltage 3 1 P 173 3 142

Stp Circuit Failure Blink Sequence Serial Line Information

4 Engine Timing Sensor Data Erratic/Incorrect 3 2 S 22 2 128/143

4 Engine Timing Sensor Abnormal Freq.,PW or T 3 2 S 22 8 128/143

5 Redundant Engine Speed Mon Engine Timing and position do

not agree






3 3 P 190 2 128

4 Engine Position Sensor Data Erratic/Incorrect 3 4 S 21 2 128/143

4 Engine Position Sensor Abnormal Freq.,PW or T 3 4 S 21 8 128/143

8 Engine Brake Output #1 High Voltage / Open 3 5 S 79 5 128

8 Engine Brake Output #1 Low Voltage 3 5 S 79 4 128

8 Engine Brake Output #2 High Voltage / Open 3 6 S 80 5 128

8 Engine Brake Output #2 Low Voltage 3 6 S 80 4 128

* Exhaust Brake Output Low Voltage 3 7 S 81 4 128

* Exhaust Brake Output Low Voltage 3 7 S 30 4 143

* Exhaust Brake Output High Voltage 3 7 S 81 3 128

* Exhaust Brake Output High Voltage 3 7 S 30 3 143

6 Transmission Splitter Position Mech. System Not Resp. 3 8 S 152 7 142

6 Transmission Splitter Position Abnormal Freq.,PW or T 3 8 S 152 8 142

9 Oil Condition Sensor 3 9 128

4 Vehicle Speed Low Voltage 4 1 P 84 4 142

4 Vehicle Speed High Voltage 4 1 P 84 3 142

4 Vehicle Speed Abnormal Freq.,PW or T 4 1 P 84 8 142

4 Vehicle Speed Open 4 1 P 84 5 142

6 Vehicle Speed Data Invalid 4 1 P 84 2 142

7 Vehicle Speed Mode Not Identifiable 4 1 P 84 11 142

7 Vehicle Speed Below Normal 4 1 P 84 1 142

4 Fan Clutch Output Data Erratic 4 2 S 33 2 128/143

4 Fan Clutch Output Low Voltage 4 2 S 27 4 128/143

5 Fan Clutch Output Open 4 2 S 33 5 128

4 Fan Clutch Output High Voltage 4 2 S 27 3 128/143

6 Aux. Output #1 Low Voltage 4 3 S 10 4 142

6 Aux. Output #1 High Voltage 4 3 S 10 3 142

6 Aux. Output #2 Low Voltage 4 4 S 11 4 142

6 Aux. Output #2 High Voltage 4 4 S 11 3 142

* Aux. Output Device Driver Low Voltage 4 5 S 26 4 128/143

* Aux. Output Device Driver High Voltage 4 5 S 26 3 128/143

8 Wastegate Output Mech. System Not Resp. 4 5 S 32 7 128

8 Wastegate Output Open 4 5 S 32 5 128

8 Wastegate Output Data Erratic 4 5 S 32 2 128

9 VGT Position Sensor Mech. System Not Resp. 4 5 S 147 7 128

4 Tachometer Output Low Voltage 4 6 S 6 4 142

4 Tachometer Output High Voltage 4 6 S 6 3 142

4 Speedometer Output Low Voltage 4 7 S 7 4 142

4 Speedometer Output High Voltage 4 7 S 7 3 142

6 CDS (Cust Def Stat) Fault Above Normal 4 8 S 151 0 142

6 CDS (Cust Def Stat) Fault Below Normal 4 8 S 151 1 142

6 CDS (Cust Def Stat) Fault Abnormal Freq.,PW or T 4 8 S 151 8 142

9 EGR Valve #1 4 9 P 27 128

4 Accel. Pedal Position Low Voltage / Open 5 1 P 91 4 142

4 Accel. Pedal Position High Voltage 5 1 P 91 3 142

61 Cummins Accel Pedal Position Accel Pedal Invalid 5 1 P 91 2 142

6 Cummins Idle Validation

Switch Invalid

Switch position says idle, Pedal

says not Idle.

5 1 P 91 7 142

6 Cummins Idle Validation

Switch Invalid

Switch position says not idle,

Pedal says Idle.

5 1 P 91 14 142

5 Vref Out of Range Low Voltage 5 2 S 232 4 142

5 Vref Out of Range High Voltage 5 2 S 232 3 142

4 Shutdown Lamp Low Voltage 5 3 S 238 4 142

4 Shutdown Lamp High Voltage 5 3 S 238 3 142

 * Driver Alarm Low Voltage 5 4 S 224 4 142

 * Driver Alarm High Voltage 5 4 S 224 3 142

4 Fault Lamp Low Voltage 5 5 S 239 4 142

4 Fault Lamp High Voltage 5 5 S 239 3 142

7 Spare Relay 3 Low Voltage 5 6 S 12 4 142

7 Spare Relay 3 High Voltage 5 6 S 12 3 142

5 Engine Oil Level Low Voltage 5 7 P 98 4 128/143

5 Engine Oil Level High Voltage 5 7 P 98 3 128/143

9 EGR Temperature 5 8 P 412 128

9 EGR Delta Pressure 5 9 P 411 128

5 Fuel Level Low Voltage 6 1 P 96 4 142

5 Fuel Level High Voltage / Open 6 1 P 96 3 142

9 Turbocharger Speed Abnormal Freq.,PW or T 6 2 P 103 8 128

4 J1708/J1587 Link Abnormal Freq.,PW or T 6 3 S 250 8 142

4 J1708/J1587 Link Abnormal Freq.,PW or T 6 3 S 250 8 128/143

4 J1939 Link Abnormal Freq.,PW or T 6 4 S 231 8 142

4 J1939 Link Abnormal Freq.,PW or T 6 4 S 231 8 128/143

4 All VECU Communications

Lost - engine shutdown

Failed Device 6 5 S 254 8 128

4 Fuel Control Module Failed Device 6 6 S 233 12 128/143

4 Power Relay Data Erratic/Incorrect 6 7 S 236 2 128/143

6 J1939 Link Lost Contact with Tranny 6 8 S 231 14 142

7 Possible J1939 Link Other ECU failure Affecting

Operation

6 9 S 216 12 142

4 Service Brake Low Voltage 7 1 S 246 4 142

4 Parking Brake High Voltage 7 2 S 235 3 142

4 Spd Cntl ‘Set’ Switch High Voltage 7 3 S 243 3 142

4 Spd Cntl ‘Resume’ Switch High Voltage 7 4 S 242 3 142

5 Alternator Voltage LowVoltage 7 5 P 167 1 142

5 Alternator Voltage High Voltage 7 5 P 167 0 142

4 Battery Voltage Low Voltage 7 5 P 168 1 142

4 Switched Voltage Low Voltage 7 6 P 158 4 128/143

5 Exhaust Temp Reference Failed Device 7 7 S 254 12 142

9 CAC Bypass Output 7 8 S 26 128

9 VGT Actuator 7 9 S 27 128

4 Injector #1 Low Voltage 8 1 S 1 4 128/143

4 Injector #1 High Voltage 8 1 S 1 3 128/143

4 Injector #1 Abnormal Freq.,PW or T 8 1 S 1 8 128/143

4 Injector #1 Data Erratic 8 1 S 1 2 128/143

4 Injector #2 Low Voltage 8 2 S 2 4 128/143

4 Injector #2 High Voltage 8 2 S 2 3 128/143

4 Injector #2 Abnormal Freq.,PW or T 8 2 S 2 8 128/143

4 Injector #2 Data Erratic 8 2 S 2 2 128/143

4 Injector #3 Low Voltage 8 3 S 3 4 128/143

4 Injector #3 High Voltage 8 3 S 3 3 128/143

4 Injector #3 Abnormal Freq.,PW or T 8 3 S 3 8 128/143

4 Injector #3 Data Erratic 8 3 S 3 2 128/143

4 Injector #4 Low Voltage 8 4 S 4 4 128/143

4 Injector #4 High Voltage 8 4 S 4 3 128/143

4 Injector #4 Abnormal Freq.,PW or T 8 4 S 4 8 128/143

4 Injector #4 Data Erratic 8 4 S 4 2 128/143

4 Injector #5 Low Voltage 8 5 S 5 4 128/143

4 Injector #5 High Voltage 8 5 S 5 3 128/143

4 Injector #5 Abnormal Freq.,PW or T 8 5 S 5 8 128/143

4 Injector #5 Data Erratic 8 5 S 5 2 128/143

4 Injector #6 Low Voltage 8 6 S 6 4 128/143

4 Injector #6 High Voltage 8 6 S 6 3 128/143

4 Injector #6 Abnormal Freq.,PW or T 8 6 S 6 8 128/143

4 Injector #6 Data Erratic 8 6 S 6 2 128/143

* Injector #7 TBD 8 7 S 7 TBD 128/143

* Injector #8 TBD 8 8 S 8 TBD 128/143

5 System Diagnostic - Solenoid

Boost Voltage

High Voltage 8 9 S 151 3 128

5 System Diagnostic - Solenoid

Boost Voltage

Low Voltage 8 9 S 151 4 128

7 Transport Protocol Table programming failure 9 1 S254 14 142

7 Power reset without key switch Low Voltage 9 2 S254 4 142

8 Power reset without key switch Low Voltage 9 2 S254 4 128

9 Aftercooler Outlet Temperature Low Voltage 9 3 4 128

9 Aftercooler Outlet Temperature High Voltage 9 3 3 128

9 Aftercooler Outlet Temperature Current Low / Open 9 3 5 128

9 Aftercooler Outlet Pressure Low Voltage / Open 9 4 4 128

9 Aftercooler Outlet Pressure High Voltage 9 4 3 128

9 Compressor Discharge

Temperature

Low Voltage 9 5 4 128

9 Compressor Discharge

Temperature

High Voltage 9 5 3 128

9 Compressor Discharge

Temperature

Current Low / Open 9 5 5 128





* Diagnostic not yet available on production vehicles + Diagnostic code reserved but not implemented

! Diagnostic is for an RenaultVI Step 8 function used in US for Step 9

4 - available beginning in Step 4 (1MS312A/38P2) 5 - available beginning in Step 5 (1MS316/317)

6 - available beginning in Step 6 (1MS320) 7 - available beginning in Step 7 (1MS328/326A)

8 - available beginning in Step 8 (1MS322/327) 9 – available in Step 9 with EDC7





MACK Truck NOTES ON DIAGNOSTIC CODES

CODE COMMENTS



1-3, 2-2, 4-3, 4-4, 5-7,7-3, 7-4 These diagnostics are enabled either by the customer or the OEM and are not

enabled on most chassis.



3-3 The EECU will broadcast this fault on the J1587 line if engine speed from one or

more sensors exceeds 2500 RPM. This is a plausibility check.



3-8 In Step 6 the SID was accidentally set to SID 32. It should be SID 152 which

was fixed in Step 7.



6-5 The EECU will log this fault if both J1587 and J1939 communications with the

VECU have been lost. Under these circumstances the engine will shutdown.



6-6 The EECU logs this fault if it has detected an internal problem.



6-7 The EECU will log this fault if it has been instructed by the VECU to perform its



post-run diagnostics and stop operation, and the EECU finds that the electrical

power has not been shut off by the VECU.



7-5 Code 7-5 is sent by the VECU based on battery/alternator voltage.



7-6 If the EECU determines that its own internal voltage is below a plausible limit

but the EECU continues to run then this fault is logged (ex. If the voltage is 4

volts the microprocessor could not run. If the processor is running then there

must be an internal problem). The EECU uses this voltage value for solenoid

control. If the voltage measurement is incorrect poor engine performance can

result. If this code is accompanied by a 7-5 code then there is an external voltage

problem.



MID 128, PID 190, FMI 2 For older software levels the EECU will log this fault but not broadcast it on the

J1587 line if engine speed from one or more sensors exceeds 2500 rpm. This is a

plausibility check without a blink code. New software versions will broadcast

this fault with a corresponding blink code.MID 128, SID 151 The EECU is having a problem controlling certain portions of the solenoid

current but a more exact diagnosis can not be made by the EECU. Contact Service

Engineering.