Isuzu N-Series. Service manual - part 264

5A4-30 ABS/ASR

N5A2028E

ABS/ASR 5A4-31

List of Diagnostic Trouble Code

Diagnosis with Blinking Pattern

If the ABS/ASR warning lamp blinking pattern is found to
be faulty with the ignition switch ON, or when the warn-
ing lamp comes on during the test run, perform the diag-
nosis according to the chart shown below depending on
the blinking pattern.

DTC

Description

Check flow

Flash out code (warning 

lamp blinking pattern)

Tech 2 

code

12

C0212

Normal

—

13

C0213

Model type identification fault due to wrong assembly
of control unit

B-2

14

C0214

EHCU fault

B-3

15

C0215

ECU power supply fault

B-4

16

C0216

CAN Communication fault

B-5

26

C0226

ECM Communication fault

B-6

33

C0233

Motor drive circuit fault

B-7

34

C0234

Motor rotation fault

B-8

35

C0235

ASR communication fault (ASR only)
ASR continuous operation

B-9

41

C0241

Fail-safe relay fault

B-10

43

C0243

Solenoid drive circuit fault

B-11

45

C0245

Solenoid monitor circuit fault

B-12

51

C0251

Speed sensor open/short circuit; FL

B-13

52

C0252

Speed sensor open/short circuit; FR

B-14

53

C0253

Speed sensor open/short circuit; RL

B-15

54

C0254

Speed sensor open/short circuit; RR

B-16

61

C0261

Speed sensor signal fault/wrong tire size; FL

B-17

62

C0262

Speed sensor signal fault/wrong tire size; FR

B-18

63

C0263

Speed sensor signal fault/wrong tire size; RL

B-19

64

C0264

Speed sensor signal fault/wrong tire size; RR

B-20

5A4-32 ABS/ASR

No.

Lamp condition

Warning lamp illumination pattern

Diagnostic flow

1

Warning lamp shows 
normal.

Normal

2

Warning lamp remains 
off.

ABS
ABS warning lamp illumi-
nation circuit is faulty.
Go to check flow B-1-1.

ASR
ASR warning lamp illumi-
nation circuit is faulty.

N5A2029E

N5A2030E

ABS/ASR 5A4-33

3

Warning lamp remains 
on.

DTC is stored. Display 
the DTC and perform the 
diagnosis for each code 
according to the diagnos-
tic flow.
If DTC is not stored, 
warning lamp illumination 
circuit or meter may be 
faulty.
Check the meter itself or 
harness between the 
meter and EHCU con-
nector terminal 6.

4

Warning lamp comes on 
when driving.

DTC is stored. Display 
the DTC and perform the 
diagnosis for each code 
according to the diagnos-
tic flow.

5

Warning lamp repeats 
blinking after turning the 
starter switch ON, and 
then turns on when driv-
ing the vehicle.

Self-diagnosis circuit is 
faulty.
Go to check flow B-1-2.

No.

Lamp condition

Warning lamp illumination pattern

Diagnostic flow

N5A2031E

N5A2032E

N5A2033E