ANTI-LOCK BRAKE SYSTEM — Diagnosis Chart (ABS-3, ABS-4)

P-58spec table

IMPORTANT

ABS-3 Diagnostic trouble code: 22, 24, 26, 28

Possible failure: Solenoid valve, harness

ABS-3 — Diagnostic trouble code: 22, 24, 26, 28

Step	Check item	Remark	Refer to
1	Check ABS control module connector	Check for poor connection	—
2	Check wiring harness between hydraulic unit and ABS control module	Check for open or short to ground	—
3	Check ABS hydraulic unit solenoid valve	Check for open circuit	P-63
4	Check ABS warning light operation	If warning illuminates constantly after turning ignition switch ON, replace ABS control module	—
		If warning light does not illuminate after turning ignition switch ON, there was a temporary poor contact in wiring and now ABS system is functioning	—

Check itemCheck ABS control module connector

RemarkCheck for poor connection

Refer to—

Check itemCheck wiring harness between hydraulic unit and ABS control module

RemarkCheck for open or short to ground

Refer to—

Check itemCheck ABS hydraulic unit solenoid valve

RemarkCheck for open circuit

Refer toP-63

Check itemCheck ABS warning light operation

RemarkIf warning illuminates constantly after turning ignition switch ON, replace ABS control module

Refer to—

Check item

RemarkIf warning light does not illuminate after turning ignition switch ON, there was a temporary poor contact in wiring and now ABS system is functioning

Refer to—

IMPORTANT

ABS-4 Diagnostic trouble code: 51

Possible failure: Fail-safe relay

ABS-4 — Diagnostic trouble code: 51

Step	Check item	Remark	Refer to
1	Check pump fuse	Check pump fuse condition	P-63
		Check short to ground	—
2	Check relay box	Check for open circuit	P-72
3	Check wiring harness between relay box and hydraulic unit or control module	Check for open or short to ground	—
4	Check ABS warning light operation	If warning light illuminates constantly after turning ignition switch ON, replace ABS control module	—
		If warning light does not illuminate after turning ignition switch ON, there was a temporary poor contact in wiring and now ABS system is functioning	—

Check itemCheck pump fuse

RemarkCheck pump fuse condition

Refer toP-63

Check item

RemarkCheck short to ground

Refer to—

Check itemCheck relay box

RemarkCheck for open circuit

Refer toP-72

Check itemCheck wiring harness between relay box and hydraulic unit or control module

RemarkCheck for open or short to ground

Refer to—

Check itemCheck ABS warning light operation

RemarkIf warning light illuminates constantly after turning ignition switch ON, replace ABS control module

Refer to—

Check item

RemarkIf warning light does not illuminate after turning ignition switch ON, there was a temporary poor contact in wiring and now ABS system is functioning

Refer to—

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ANTI-LOCK BRAKE SYSTEM — Diagnosis Chart (ABS-3, ABS-4)

ABS-3 — Diagnostic trouble code: 22, 24, 26, 28

ABS-4 — Diagnostic trouble code: 51

See also

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