Page text (OCR transcript)
AC-65
AIR CONDITIONING SYSTEM – TROUBLESHOOTING
7 Check magnetic clutch relay.
P Remove magnetic clutch relay from R/B No. 2.
C Check continuity between each pair of terminals shown below of magnetic clutch relay.
OK Terminals 1 and 2 Approx. 75 Ω
Terminals 3 and 5 No continuity
P 1. Apply battery positive voltage between terminals 1 and 2.
2. Check continuity between terminals 3 and 5.
OK Terminals 3 and 5 Continuity
N08833
OK
NG Replace magnetic relay.
8 Check voltage between terminal ACMG of ECM and body ground.
ON
IG ON
ECM
BE6663
AC2997
ACMG
P 1. Remove the ECM with connectors still connected.
2. Turn ignition switch on.
C 1. Turn fan speed control dial (Lo, Med or Hi).
2. Measure voltage between terminal ACMG of the ECM connector and body ground.
OK A/C Switch Voltage
ON Approx. 1.3. V
OFF Battery positive voltage ~ 1.3 V
NG
OK Proceed to next circuit inspection shown on matrix chart (See page AC-26).
9 Check for open and short in harness and connector between the ECM and battery (See page IN-30).
OK
NG Repair or replace harness or connector.
Check and replace the ECM.
