DESCRIPTION
WIRING DIAGRAM
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) |
(a) Disconnect the G49 radio and display receiver assembly connector.
(b) Disconnect the U2 map light assembly (telephone microphone assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
G49-4 (MACC) - U2-14 (MACC) |
Always |
Below 1 Ω |
G49-5 (MIN+) - U2-13 (MCO+) |
Always |
Below 1 Ω |
G49-6 (SNS2) - U2-15 (SNS2) |
Always |
Below 1 Ω |
G49-19 (MIN-) - U2-12 (MCO-) |
Always |
Below 1 Ω |
G49-4 (MACC) - Body ground |
Always |
10 kΩ or higher |
G49-5 (MIN+) - Body ground |
Always |
10 kΩ or higher |
G49-6 (SNS2) - Body ground |
Always |
10 kΩ or higher |
G49-18 (SGND) - Body ground |
Always |
10 kΩ or higher |
G49-19 (MIN-) - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY |
(a) Reconnect the G49 radio and display receiver assembly connector.
(b) Reconnect the U2 map light assembly (telephone microphone assembly) connector.
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
G49-18 (SGND) - Body ground |
Always |
Below 1 Ω |
G49-19 (MIN-) - Body ground |
Always |
Below 1 Ω |
*a |
Component with harness connected (Radio and Display Receiver Assembly) |
NG |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
3. |
INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) |
(a) Disconnect the U2 map light assembly (telephone microphone assembly) connector.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG |
GO TO STEP 5 |
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4. |
INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) |
(a) Reconnect the G49 radio and display receiver assembly connector.
(b) Reconnect the U2 map light assembly (telephone microphone assembly) connector.
(c) Turn the ignition switch to ACC.
(d) Connect an oscilloscope to terminals 13 (MCO+) and 12 (MCO-) of the U2 map light assembly (telephone microphone assembly) connector. Text in Illustration
|
|
(e) Check the waveform of the telephone microphone assembly using the oscilloscope.
Result |
Proceed to |
---|---|
A waveform synchronized with the voice input to the map light assembly (telephone microphone assembly) is output |
A |
A waveform synchronized with the voice input to the map light assembly (telephone microphone assembly) is not output |
B |
A |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
5. |
REPLACE TELEPHONE MICROPHONE ASSEMBLY |
(a) Replace the telephone microphone assembly (See page ).
(b) Check if the same malfunction recurs.
Result |
Proceed to |
---|---|
Malfunction does not recur (returns to normal) |
A |
Malfunction recurs |
B |
A |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B |
REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) |
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after d ...
Monitor Drive Pattern
MONITOR DRIVE PATTERN
1. TEST MONITOR DRIVE PATTERN FOR ECT
CAUTION:
Perform this drive pattern on a level surface and strictly observe the posted
speed limits and traffic laws while driving.
HINT:
Performing this drive pattern is one method to simulate ...