Nissan Frontier D22. Instruction — part 827
MTC-30
TROUBLE DIAGNOSIS
Operational Check
EJS00206
The purpose of the operational check is to confirm that the system operates as it should. The systems which
are checked are the blower, mode (discharge air), intake air (recirculation), temperature decrease, tempera-
ture increase, and A/C compressor.
CONDITIONS:
Engine running at normal operating temperature.
PROCEDURE:
1. Check Blower Motor
1.
Turn fan control knob to 1-speed.
Blower should operate on 1-speed.
2.
Then turn fan control knob to 2-speed, and continue checking
blower speed until all four speeds are checked.
3.
Leave blower on 4-speed.
MTC-37, "Trouble Diagnosis Procedure for Blower
If OK, continue with the check.
2. Check Discharge Air
1.
Turn mode control knob to each mode position.
2.
Confirm that discharge air comes out according to the air distri-
bution table at left.
Refer to
If NG, go to
MTC-32, "Trouble Diagnosis Procedure For Mode Door"
.
If OK, continue with next check.
WHA317
WHA318
AHA983
TROUBLE DIAGNOSIS
MTC-31
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MTC
3. Check Recirculation
1.
Press recirculation switch.
Recirculation indicator should light.
2.
Listen for intake door position to change (you should hear
blower sound change slightly).
If NG, go to
MTC-34, "Trouble Diagnosis Procedure for Intake Door"
.
If OK, continue with next check.
4. Check Temperature Decrease
1.
Turn temperature control knob to full cold.
2.
Check for cold air at discharge air outlets.
If NG, go to
MTC-49, "TROUBLE DIAGNOSIS PROCEDURE FOR
.
If OK, continue with next check.
5. Check Temperature Increase
1.
Turn temperature control knob to full hot.
2.
Check for hot air at discharge air outlets.
If NG, go to
MTC-57, "TROUBLE DIAGNOSIS PROCEDURE FOR
If OK, continue with next check.
6. Check A/C Switch
1.
Turn fan control knob to the desired (1 to 4 speed) position.
2.
Push the A/C switch to turn ON the air conditioner.
The indicator lamp should come on when air conditioner is ON.
3.
Confirm that the compressor clutch engages (audio or visual
inspection).
4.
Check for cold air at the appropriate discharge air outlets.
If NG, go to
MTC-42, "TROUBLE DIAGNOSIS PROCEDURE FOR
If OK, continue with next check.
If all operational checks are OK (symptom cannot be duplicated), go
to
GI-25, "How to Perform Efficient Diagnosis for an Electrical Inci-
, and perform tests as outlined to simulate driving conditions environment. If symptom appears, refer to
and perform applicable trouble diagnoses procedures.
WHA319
WHA320
WHA321
WHA322
MTC-32
TROUBLE DIAGNOSIS
Mode Door
EJS00207
TROUBLE DIAGNOSIS PROCEDURE FOR MODE DOOR
Symptom:
●
Mode door does not change.
Inspection Flow
WHA325
*1:
*2:
*3:
*4:
TROUBLE DIAGNOSIS
MTC-33
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MTC
MODE DOOR CONTROL LINKAGE ADJUSTMENT
Mode door control linkage
●
Turn mode door control knob to
position.
●
Set side link in DEF mode.
●
Pull on outer cable in direction of arrow and then clamp it.
●
After positioning mode door control cable, check that it
operates properly.
AHA121A
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