Page 440 of 788

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-52
STEP 2. Connector check: Combination meter
connector C-06 and engine coolant temperature
gauge unit connector B-112
Q: Is combination meter connector C-06 and engine
coolant temperature gauge unit connector B-112 in
good condition?
YES :
Go to Step 3.
NO : Repair or replace the damage
component(s).
STEP 3. Check the wiring harness between
combination meter connector C-06 (terminal 50)
and engine coolant temperature gauge unit
connector B-112 (terminal 1).
AC303784
Connector: B-112
<4G1-MPI>
Harness side
B-112 (B)
AF
AC303792
AE
Connector: B-112
<4G6-MPI>
B-112 (B) Harness side
AC303798
Connector: C-06
Harness side
C-06 (L)
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
AV
AC303814AU
Connector: C-06
Harness side
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
C-06 (L)
AC303784
Connector: B-112
<4G1-MPI>
Harness side
B-112 (B)
AF
AC303792
AE
Connector: B-112
<4G6-MPI>
B-112 (B) Harness side
AC303798
Connector: C-06
Harness side
C-06 (L)
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
AV
AC303814AU
Connector: C-06
Harness side
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
C-06 (L)
Page 441 of 788
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-53
NOTE:
Prior to the wiring harness inspection, check
intermediate connectors C-13 ,
C-137 , and repair if necessary.Q: Is the wiring harness between combination meter
connector C-06 (terminal 50) and engine coolant
temperature gauge unit connector B-112 (terminal
1) in good condition?
YES :
Go to Step 4.
NO : Repair or replace the damage
component(s).
STEP 4. Retest the system
Q: Is the engine coolant temperature gauge normal?
YES :
The procedure is complete. If no
malfunctions are found in all steps, an
intermittent malfunction is suspected (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service
Points-How to Cope with Intermittent
Malfunction P.00-5).
NO : Replace the combination meter.
AC303800
Connector: C-13
Harness side
AG
AC303818
AM
Connector: C-137
Harness side
Page 442 of 788
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-54
INSPECTION PROCEDURE 6: Combination meter does not work. (the instruments do not work)
TECHNICAL DESCRIPTION (COMMENT)
The cause is thought to be malfunction of the power,
earth circuitry or combination meter.
TROUBLESHOOTING HINTS
•Malfunction of the combination meter
•Damaged wiring harness or connectors
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet IGNITION
SWITCH (IG1)
COMBINATION
METER
CONTROL CIRCUIT BATTERY
RELAY
BOX
NOTELH drive vehicles
RH drive vehicles
Combination Meter Power Source Circuit
Page 443 of 788
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-55
DIAGNOSIS PROCEDURE
STEP 1. Voltage measurement at combination
meter connector C-04 in order to check the
battery circuit of power supply system to the
combination meter.
(1) Disconnect the combination meter connector
C-04 and measure the voltage at combination
meter connector C-04 harness side.
(2) Measure the voltage between terminal 7 and
earth.
OK: System voltage
Q: IS the check result normal?
YES :
Go to Step 4.
NO : Go to Step 2.
STEP 2. Connector check: Combination meter
connector C-04.
Q: Is combination meter connector C-04 in good
condition?
YES :
Go to Step 3.
NO : Repair or replace the connector. Check to
see that all meters operate.
AC303798
Connector: C-04
Harness side
AT
AC303814
Connector: C-04
Harness side
AT
AC301541
Connector C-04
(Harness side)
EZ
AC303798
Connector: C-04
Harness side
AT
AC303814
Connector: C-04
Harness side
AT
Page 444 of 788
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-56
STEP 3. Check the wiring harness between
combination meter connector C-04 (terminal 7)
and battery.
NOTE: .Prior to the wiring harness inspection, check
intermediate connectors C-27 ,
C-115 , joint connector C-103,
and repair if necessary.
Q: Are the wiring harness between combination meter
connector C-04 (terminal 7) and battery in good
condition?
YES :
There is no action to be taken.
NO : Repair or replace the wiring harness. Check
to see that all meters operate.
AC303798
Connector: C-04
Harness side
AT
AC303814
Connector: C-04
Harness side
AT
AC303798AX
Connector: C-27
Harness side
AC303802
Connector: C-103
Harness sideC-103 (GR)
AG
AC303818
AO
Connector: C-103
Harness side
C-103 (GR)
AC303816
Connector: C-115
Harness side
AZ
Page 445 of 788
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-57
STEP 4. Voltage measurement at combination
meter connector C-04 to check the battery circuit
of power supply system to the combination
meter.
(1) Measure at combination meter connector C-04
without disconnecting the connector.
(2) Turn the ignition switch to “ON” position.
(3) Measure the voltage between terminal 9 and
earth.
OK: System voltageQ: Is the check result normal?
YES :
Go to Step 7.
NO : Go to Step 5.
STEP 5. Connector check: combination meter
connector C-04
Q: Is combination meter connector C-04 in good
condition?
YES :
Go to Step 6.
NO : Repair or replace the connector. Check to
see that all meters operate.
AC303798
Connector: C-04
Harness side
AT
AC303814
Connector: C-04
Harness side
AT
AC301541
Connector: C-04
(Harness side)
FA
AC303798
Connector: C-04
Harness side
AT
AC303814
Connector: C-04
Harness side
AT
Page 446 of 788
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-58
STEP 6. Check the wiring harness between
combination meter connector C-04 (terminal 9)
and ignition switch (IG1).
NOTE: Prior to the wiring harness inspection, check
Junction block connectors C-210 and C-212, joint
connector C-03 , and repair if
necessary.
Q: Are the wiring harness between combination meter
connector C-04 (terminal 42) and ignition switch
(IG1) in good condition?
YES :
There is no action to be taken.
NO : Repair or replace the wiring harness. Check
to see that all meters operate.
AC303798AU
Connector: C-03, C-04
C-04
C-03 (B)
C-04 C-03 Harness side
AC303814
Connector: C-04
Harness side
AT
AC303809
Connector: C-210, C-212
C-212
C-210
C-210 Harness side
C-212
AX
Front view
AC303823
Connector: C-210, C-212
C-210
C-212Front view
Harness side
C-210
C-212
AU
Page 447 of 788
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-59
STEP 7. Resistance measurement at combination
meter connector C-04 to check the earth circuit
to the combination meter.
(1) Disconnect the combination meter connector
C-04 and measure the resistance at combination
meter connector C-04.
(2) Measure the resistance between terminal 1 and
earth.
OK: 2 ohms or less
(3) Measure the resistance between terminal 2 and
earth.
OK: 2 ohms or lessQ: Is the check result normal?
YES :
Repair or replace the connector.
NO : Go to Step 8.
STEP 8. Connector check: Combination meter
connector C-04.
Q: Is combination meter connector C-04 in good
condition?
YES :
Go to Step 9.
NO : Repair or replace the wiring harness. Check
to see that all meters operate.
AC303798
Connector: C-04
Harness side
AT
AC303814
Connector: C-04
Harness side
AT
AC301541FB
Connector: C-04
(Harness side)
AC303798
Connector: C-04
Harness side
AT
AC303814
Connector: C-04
Harness side
AT