Page 2521 of 2890
10U17CHECK POOR CONTACT IN CONNEC-
TOR BETWEEN ABSCM AND HYDRAU-
LIC UNIT.
: Is there poor contact in connectors between
ABSCM and hydraulic unit?
: Repair connector.
: Go to step10U18.
10U18
CHECK ABSCM.
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.
: Go to next.
: Are other trouble codes being output?
: Proceed with the diagnosis corresponding to the
trouble code.
: A temporary poor contact.
181
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10. Diagnostics Chart with Select Monitor
Page 2522 of 2890
B4M0962
V: 41 ECU
—ABNORMAL ABS CONTROL MODULE—
DIAGNOSIS:
Faulty ABSCM
TROUBLE SYMPTOM:
ABS does not operate.
10V1.Check ground circuit of ABSCM.
10V2.Check poor contact in connector between
battery, ignition switch and ABSCM.
10V3.Check sources of signal noise.
10V4.Check ABSCM.
WIRING DIAGRAM:
B4M0837
182
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10. Diagnostics Chart with Select Monitor
Page 2523 of 2890
B4M0838A
10V1
CHECK GROUND CIRCUIT OF ABSCM.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM.
3) Measure resistance between ABSCM and chassis
ground.
: Connector & terminal
(F49) No. 1—Chassis ground
(F49) No. 55—Chassis ground
Is resistance less than 0.5Ω?
: Go to step10V2.
: Repair ABSCM ground harness.
10V2CHECK POOR CONTACT IN CONNEC-
TORS BETWEEN BATTERY, IGNITION
SWITCH AND ABSCM.
: Is there poor contact in connectors between
battery, ignition switch and ABSCM?
: Repair connector.
: Go to step10V3.
10V3
CHECK SOURCES OF SIGNAL NOISE.
: Is the car telephone or the wireless trans-
mitter properly installed?
: Go to next.
: Properly install the car telephone or the wireless
transmitter.
: Are noise sources (such as an antenna)
installed near the sensor harness?
: Install the noise sources apart from the sensor
harness.
: Go to step10V4.
183
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor
Page 2524 of 2890
10V4
CHECK ABSCM.
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.
: Go to next.
: Are other trouble codes being output?
: Proceed with the diagnosis corresponding to the
trouble code.
: A temporary poor contact.
184
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor
Page 2525 of 2890
B4M0963
W: 42 LOW VOLTAGE
—SOURCE VOLTAGE IS LOW.—
DIAGNOSIS:
Power source voltage of the ABSCM is low.
TROUBLE SYMPTOM:
ABS does not operate.
10W1.Check generator.
10W2.Check battery terminal.
10W3.Check input voltage of ABSCM.
10W4.Check ground circuit of ABSCM.
10W5.Check poor contact in connector between
generator, battery and ABSCM.
10W6.Check ABSCM.
185
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10. Diagnostics Chart with Select Monitor
Page 2526 of 2890
WIRING DIAGRAM:
B4M1039
186
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10. Diagnostics Chart with Select Monitor
Page 2527 of 2890
B4M0430
10W1
CHECK GENERATOR.
1) Start engine.
2) Idling after warm-up.
3) Measure voltage between generator B terminal and
chassis ground.
: Terminal
Generator B terminal—Chassis ground
Is voltage 10—15 V?
: Go to step10W2.
: Repair generator.
10W2
CHECK BATTERY TERMINAL.
Turn ignition switch to OFF.
: Are the positive and negative battery termi-
nals tightly clamped?
: Go to step10W3.
: Tighten the clamp of terminal.
B4M0842A
10W3
CHECK INPUT VOLTAGE OF ABSCM.
1) Disconnect connector from ABSCM.
2) Run the engine at idle.
3) Measure voltage between ABSCM connector and chas-
sis ground.
: Connector & terminal
(F49) No. 28 (+)—Chassis ground ( )
Is voltage 10—15 V?
: Go to step10W4.
: Repair harness connector between battery, igni-
tion switch and ABSCM.
187
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10. Diagnostics Chart with Select Monitor
Page 2528 of 2890
B4M0843A
10W4
CHECK GROUND CIRCUIT OF ABSCM.
1) Turn ignition switch to OFF.
2) Measure resistance between ABSCM connector and
chassis ground.
: Connector & terminal
(F49) No. 1—Chassis ground
Is resistance less than 0.5Ω?
: Go to step10W5.
: Repair ABSCM ground harness.
10W5CHECK POOR CONTACT IN CONNEC-
TOR BETWEEN GENERATOR, BATTERY
AND ABSCM.
: Is there poor contact in connectors between
generator, battery and ABSCM?
: Repair connector.
: Go to step10W6.
10W6
CHECK ABSCM.
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.
: Go to next.
: Are other trouble codes being output?
: Proceed with the diagnosis corresponding to the
trouble code.
: A temporary poor contact.
188
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor