Page 3001 of 3342
DIAGNOSIS:
Faulty harness/connector
Faulty inlet solenoid valve
TROUBLE SYMPTOM:
ABS does not operate.
WIRING DIAGRAM:
B4M1245
125
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor
Page 3002 of 3342
B4M1234A
10Q1CHECK INPUT VOLTAGE OF
ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U.
3) Run the engine at idle.
4) Measure voltage between ABSCM&H/U connector and
chassis ground.
Connector & terminal
(F49) No. 1 (+)—Chassis ground ( ):
: Is the voltage between 10 V and 15 V?
: Go to step10Q2.
: Repair harness connector between battery, igni-
tion switch and ABSCM&H/U.
B4M1243A
10Q2CHECK GROUND CIRCUIT OF
ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Measure resistance between ABSCM&H/U connector
and chassis ground.
Connector & terminal
(F49) No. 23—Chassis ground:
: Is the resistance less than 0.5Ω?
: Go to step10Q3.
: Repair ABSCM&H/U ground harness.
10Q3CHECK POOR CONTACT IN CONNEC-
TORS.
: Is there poor contact in connectors between
generator, battery and ABSCM&H/U?
to FOREWORD [T3C1].>
: Repair connector.
: Go to step10Q4.
126
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor
Page 3003 of 3342
10Q4
CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the trouble code.
: Is the same trouble code as in the current
diagnosis still being output?
: Replace ABSCM&H/U.
: Go to step10Q5.
10Q5CHECK ANY OTHER TROUBLE CODES
APPEARANCE.
: Are other trouble codes being output?
: Proceed with the diagnosis corresponding to the
trouble code.
: A temporary poor contact.
127
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor
Page 3004 of 3342
B4M0958
R: TROUBLE CODE 32 FR. AV VALVE
—ABNORMAL FRONT RH OUTLET
SOLENOID VALVE—
B4M0959
S: TROUBLE CODE 34 FL. AV VALVE
—ABNORMAL FRONT LH OUTLET
SOLENOID VALVE—
B4M0960
T: TROUBLE CODE 36 RR. AV VALVE
—ABNORMAL REAR RH OUTLET SOLENOID
VA LV E—
B4M0961
U: TROUBLE CODE 38 RL. AV VALVE
—ABNORMAL REAR LH OUTLET SOLENOID
VA LV E—
128
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor
Page 3005 of 3342
DIAGNOSIS:
Faulty harness/connector
Faulty outlet solenoid valve
TROUBLE SYMPTOM:
ABS does not operate.
WIRING DIAGRAM:
B4M1245
129
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor
Page 3006 of 3342
B4M1234A
10U1CHECK INPUT VOLTAGE OF
ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U.
3) Run the engine at idle.
4) Measure voltage between ABSCM&H/U connector and
chassis ground.
Connector & terminal
(F49) No. 1 (+)—Chassis ground ( ):
: Is the voltage between 10 V and 15 V?
: Go to step10U2.
: Repair harness connector between battery, igni-
tion switch and ABSCM&H/U.
B4M1243A
10U2CHECK GROUND CIRCUIT OF
ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Measure resistance between ABSCM&H/U connector
and chassis ground.
Connector & terminal
(F49) No. 23—Chassis ground:
: Is the resistance less than 0.5Ω?
: Go to step10U3.
: Repair ABSCM&H/U ground harness.
10U3CHECK POOR CONTACT IN CONNEC-
TORS.
: Is there poor contact in connectors between
generator, battery and ABSCM&H/U?
to FOREWORD [T3C1].>
: Repair connector.
: Go to step10U4.
130
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor
Page 3007 of 3342
10U4
CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the trouble code.
: Is the same trouble code as in the current
diagnosis still being output?
: Replace ABSCM&H/U.
: Go to step10U5.
10U5CHECK ANY OTHER TROUBLE CODES
APPEARANCE.
: Are other trouble codes being output?
: Proceed with the diagnosis corresponding to the
trouble code.
: A temporary poor contact.
131
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor
Page 3008 of 3342
B4M0962
V: TROUBLE CODE 41 ECU
—ABNORMAL ABS CONTROL MODULE—
DIAGNOSIS:
Faulty ABSCM&H/U
TROUBLE SYMPTOM:
ABS does not operate.
WIRING DIAGRAM:
B4M1246
132
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor