Step
| Action
| Value(s)
| Yes
| No
|
1
| Was
the Powertrain ON Board Diagnostic (OBD) System Check performed?
| --
|
Go to Step 2
| Go to the
Powertrain On Board Diagnostic (OBD) System Check
|
2
|
- Turn ON the ignition switch leaving the engine OFF.
- Install a scan tool.
Are any PCM DTCs stored?
| --
| Go to applicable DTC table
|
Go to Step 3
|
3
|
- Ensure that the engine coolant temperature is below the specified
value with the scan tool.
- Turn OFF the A/C switch.
- Observe the cooling fans.
Are both the cooling fans running?
| 100°C (212°F)
|
Go to Step 32
|
Go to Step 4
|
4
|
- Command ON the Low Speed Fans using the scan tool output tests
function.
- Observe the cooling fans.
Is the RH or LH cooling fans running at low speed?
| --
|
Go to Step 5
|
Go to Step 8
|
5
|
- Command ON the high speed fans using the scan tool output tests
function.
- Wait 20 seconds.
- Observe the cooling fans
Are both fans running at high speed?
| --
|
Go to Step 6
|
Go to Step 58
|
6
|
Important: Ambient temperature must be above 9°C (48°F).
- Exit the scan tool output tests.
- Start the engine.
- Turn ON the A/C switch.
Are the cooling fans ON?
| --
| Go to Diagnostic Aids
|
Go to Step 7
|
7
| View the A/C Request on the scan tool.
Does A/C Request on the scan tool display Yes?
| --
|
Go to Step 78
| Go to
Air Conditioning (A/C) Compressor Control Circuit Diagnosis
|
8
| Is either cooling fan running?
| --
|
Go to Step
9
|
Go to Step
16
|
9
| Is the left cooling fan running?
| --
|
Go to Step
10
|
Go to Step
14
|
10
|
- Turn OFF the ignition switch.
- Disconnect the RH engine cooling fan motor electrical connector.
- Turn ON the ignition switch leaving the engine OFF.
- Command ON the Low speed fans using the scan tool output tests
function.
- Observe the cooling fans.
Is the LH engine cooling fan running?
| --
|
Go to Step 11
|
Go to Step 81
|
11
| Remove the Mode Control
Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
in HVAC.
Is the LH engine cooling fan running?
| --
|
Go to Step 12
|
Go to Step 13
|
12
| Repair the short to
ground in circuit 504. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
13
|
- Check for a short to ground in circuit 532.
- If a problem is found, repair the circuit as necessary. Refer
to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
71
|
14
|
- Turn OFF the ignition switch.
- Disconnect the LH engine cooling fan motor electrical connector.
- Turn ON the ignition switch leaving the engine OFF.
- Command ON the Low speed fans using the scan tool output tests
function.
- Observe the cooling fans.
Is the RH engine cooling fan running?
| --
|
Go to Step 15
|
Go to Step 72
|
15
|
- Check for a short to B+ in the following circuit(s):
• | Shorted #2 fan control relay coil |
- If a problem is found, repair the circuit(s) as necessary. Refer
to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
80
|
16
|
- Remove the #1 Fan Control Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
- Connect a test light to ground.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the #1 Fan Control Relay cavity 30 (in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 18
|
Go to Step
17
|
17
|
- Identify the cause of no Ignition Voltage to #1 Cooling Fan Relay
cavity 30.
• | Stalled RH engine or LH engine cooling fan. |
• | Shorted RH engine or LH engine cooling fan motor windings. |
• | Short to ground in the following circuit(s) |
- Repair the cause of no Ignition Voltage to #1 Fan Control Relay.
Refer to
Wiring Repairs
in Wiring
repairs.
Is the action complete?
| --
|
Go to Step 82
| --
|
18
|
- Connect a test light to ground.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the #1 Fan Control Relay cavity 86 (in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 20
|
Go to Step
19
|
19
|
- Identify the cause of no Battery Rail Voltage to the #1 Fan Control
Relay cavity 86.
• | Open or shorted to ground in circuit 440. |
• | Shorted #1 Fan Control Relay coil. |
• | Shorted #2 Fan Control Relay coil. |
• | Shorted Mode Control Relay. |
• | Circuit unrelated to cooling fans. Refer to Fuse Block Details
in Wiring Systems. |
- Repair the cause of no Battery Rail Voltage to the #1 Fan Control
Relay cavity 86. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
20
|
- Turn OFF the ignition switch.
- Disconnect both engine cooling fans motors electrical connectors.
- Connect a fused jumper wire between terminals A and B at both
engine cooling fan motors electrical connectors.
- Turn ON the ignition switch leaving the engine OFF.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Connect a test light between the #1 Fan Control Relay cavities 87 and
30 (in the underhood fuse block).
Is the test light ON?
| --
|
Go to Step 21
|
Go to Step
27
|
21
|
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Connect a test light between the #1 Fan Control Relay cavities 85 and
86 (in the underhood fuse block).
- Turn ON the ignition switch leaving the engine OFF.
- Command ON the Low speed fans using the scan tool output tests
function.
- Observe the test light.
Is the test light ON?
| --
|
Go to Step 22
|
Go to Step
25
|
22
|
- Turn OFF the ignition switch.
- Remove the fused jumpers wires from the engine cooling fan motors
electrical connectors.
- Reconnect the engine cooling fans motors electrical connectors
to the motors.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Install a fused jumper wire between the #1 Fan Control Relay cavities
87 and 30 (in the underhood fuse block).
- Turn ON the ignition switch leaving the engine OFF.
- Observe the cooling fans.
Are both cooling fans running?
| --
|
Go to Step 23
|
Go to Step
24
|
23
|
- Check for poor electrical terminal connection(s) between the #1
Fan Control Relay and the underhood fuse block.
- If a problem is found, repair the terminal connection(s) as necessary.
Refer to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
37
|
24
|
- Check for poor electrical connections at the engine coolant fan
motors.
- If a problem is found, repair the connections as necessary. Refer
to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
64
|
25
|
- Turn OFF the ignition switch.
- Disconnect the PCM C1 blue electrical connector.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Install a fused jumper wire between the #1 Fan Control Relay cavities
86 and 85 (in the underhood fuse block).
- Turn ON the ignition switch leaving the engine OFF.
- Connect a test light to ground.
- Probe the #1 Fan Control Relay control circuit at the PCM C1 blue
electrical connector with the test light.
Is the test light ON?
| --
|
Go to Step 78
|
Go to Step
26
|
26
|
- Check for an open in the #1 Fan Control Relay control circuit
between the PCM electrical connector and the #1 Fan Control Relay cavity 86
(in the underhood fuse block).
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
27
|
- Turn OFF the ignition switch.
- Remove the jumper wires from the engine cooling fan motors electrical
connectors.
- Reconnect the engine cooling fans motors electrical connectors
to the motors.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Install a fused jumper wire between the #1 Fan Control Relay cavities
87 and 30 (in the underhood fuse block).
- Remove the Mode Control Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
- Connect a test light to ground.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the Mode Control Relay cavity 30 (in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 28
|
Go to Step
31
|
28
|
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
Connect a test light between the Mode Control Relay cavities 30 and
87A (in the underhood fuse block).
Is the test light ON?
| --
|
Go to Step 30
|
Go to Step
29
|
29
|
- Check for an open in circuit 504 between the Mode Control Relay
cavity 30 and the LH engine cooling fan motor electrical connector terminal
B.
- If a problem is found, repair the circuit as necessary. Refer
to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
57
|
30
|
- Check for a poor electrical terminal connection at the Mode Control
Relay cavities 30 or 87A (in the underhood fuse block).
- If a problem is found, repair the electrical connection as necessary.
Refer to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
71
|
31
|
- Check between the #1 Fan Control Relay cavity 87 and LH engine
cooling fan motor electrical connector terminal B for the following conditions:
• | Poor electrical terminal connection |
- If a problem is found, repair the condition(s) as necessary. Refer
to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
56
|
32
| View the A/C Request with the scan
tool.
Does the scan tool display Yes?
| --
| Go to
Air Conditioning (A/C) Compressor Control Circuit Diagnosis
|
Go to Step 33
|
33
| Are both cooling fans running at low speed?
| --
|
Go to Step 34
|
Go to Step 40
|
34
| Remove the #1 Fan Control Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
Are the cooling fans running?
| --
|
Go to Step 35
|
Go to Step
36
|
35
|
- Check for a short to voltage in circuit 409.
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
36
|
- Connect a test light to B+.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the #1 Fan Control Relay cavity 85 (in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 38
|
Go to Step
37
|
37
| Replace the #1 Fan Control Relay.
Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
Is the action complete?
| --
|
Go to Step 82
| --
|
38
|
- Turn OFF the ignition switch.
- Disconnect the PCM C1 blue electrical connector.
- Connect a test light to B+.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the #1 Fan Control Relay cavity 85 (in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 39
|
Go to Step
78
|
39
|
- Check for a short to ground in the #1 Fan Control Relay control
circuit.
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
40
| Are
both cooling fans running at high speed?
| --
|
Go to Step 41
|
Go to Step 42
|
41
| View the A/C Pressure
on the scan tool.
Does the scan tool display voltage less than the specified value?
| 1.2V
|
Go to Step 78
|
Go to Step 44
|
42
|
- Turn OFF the ignition switch.
- Disconnect the PCM electrical connectors.
- Turn ON the ignition switch leaving the engine OFF.
- Observe the cooling fans.
Is the right engine cooling fan running at high speed?
| --
|
Go to Step 43
|
Go to Step 78
|
43
|
- Check for a short to ground in the following control circuit(s):
- If a problem is found, repair the circuit as necessary. Refer
to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
52
|
44
|
- Turn OFF the ignition switch.
- Disconnect the A/C refrigerant pressure sensor electrical connector.
- Turn ON the ignition switch leaving the engine OFF.
- View the A/C Pressure on the scan tool.
Does the scan tool display voltage near the specified value?
| 0.0V
|
Go to Step 46
|
Go to Step 45
|
45
|
- Connect a DMM to ground.
- Probe the A/C refrigerant pressure signal circuit with the DMM.
Does the DMM display a voltage near the specified value?
| 0.0V
|
Go to Step 78
|
Go to Step 51
|
46
|
- Connect a test light to B+.
- Probe the A/C refrigerant pressure sensor ground circuit with
the test light.
Is the test light ON?
| --
|
Go to Step 47
|
Go to Step
49
|
47
|
- Connect a DMM to ground.
- Probe the A/C refrigerant pressure sensor 5 volt reference
circuit with the DMM.
Does the DMM display a voltage near the specified value?
| 5.0V
|
Go to Step 48
|
Go to Step 50
|
48
| Replace the A/C refrigerant pressure sensor. Refer to
Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement
in HVAC Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
49
|
- Check the A/C refrigerant pressure sensor ground circuit for the
following conditions:
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
50
|
- Check the A/C refrigerant pressure sensor 5 volt reference
circuit for the following condition(s):
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
51
|
- Check for a short to B+ in the A/C refrigerant pressure signal
circuit.
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
52
|
- Remove the Mode Control Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
- Observe the engine cooling fans.
Is the RH engine cooling fan running at high speed?
| --
|
Go to Step 53
|
Go to Step 71
|
53
| Remove the #2 Fan Control Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
Is the RH engine cooling fan running at high speed?
| --
|
Go to Step 54
|
Go to Step 55
|
54
|
- Check for short to B+ in circuit 532.
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
55
|
- Check for a short to B+ in circuit 473.
- If a problem is found, repair the circuit as necessary. Refer
to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
77
|
56
|
- Check for an open or poor electrical terminal connection in circuit
504 between the Mode Control Relay cavity 30 and LH engine cooling fan motor
electrical terminal A.
- If a problem is found, repair the circuit as necessary. Refer
to
Wiring Repairs
in Wiring
Repairs.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
80
|
57
|
- Check for an open in the following circuits:
• | Circuit 450 between the RH engine cooling fan motor electrical
connector terminal A and ground, |
• | Circuit 532 from the Mode Control Relay cavity 87A and the RH
Cooling Fan Motor electrical connector terminal B. |
- If a problem is found, repair the circuit(s) as necessary. Refer
to
Wiring Repairs
in Wiring
Repairs.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
81
|
58
| Remove the Mode Control Relay.
Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
Does the cooling fan motors turn OFF?
| --
|
Go to Step 62
|
Go to Step 59
|
59
|
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Install a test light between the Mode Control Relay cavity 86 and Battery
Rail Voltage cavity 85 (in the underhood fuse block).
- Command ON the High speed fans using the scan tool output controls
function.
- Wait about 5-6 seconds.
- Observe the test light.
Is the test light ON?
| --
|
Go to Step 62
|
Go to Step
60
|
60
|
- Remove the #2 Fan Control Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Install a test light between the #2 Fan Control Relay cavity 85 and
Battery Rail Voltage cavity 86 (in the underhood fuse block).
- Command ON the high speed fans using the scan tool output controls
function.
- Wait 10 seconds.
- Observe the test light.
Is the test light ON?
| --
|
Go to Step 79
|
Go to Step
61
|
61
|
- Turn OFF the ignition switch.
- Disconnect the PCM electrical connectors.
- Turn ON the ignition switch leaving the engine OFF.
- Check the Mode Control Relay and the #2 Fan Control Relay control
circuit for the following conditions:
- If a problem is found, repair the circuit as necessary. Refer
to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
78
|
62
|
- Turn OFF the ignition switch.
- Reinstall the Mode Control Relay.
- Disconnect both engine cooling fan motors electrical connectors.
- Turn ON the ignition switch leaving the engine OFF.
- Probe terminal B at the RH engine cooling fan motor electrical
connector with the test light .
- Connect a test light to ground.
- Command ON the High speed fans using the scan tool output controls
function.
- Wait about 10 seconds.
Is the test light ON?
| --
|
Go to Step 63
|
Go to Step
65
|
63
|
- Connect a test light to B+.
- Probe terminal A at the LH engine cooling fan motor electrical
connector with the test light.
Is the test light ON?
| --
|
Go to Step 64
|
Go to Step
72
|
64
|
- Identify the cause of inoperative engine cooling fan motor:
• | Open or shorted RH engine cooling fan motor windings. |
• | Open or shorted LH engine cooling fan motor windings. |
• | Stalled cooling fan(s). |
- Replace the affected cooling fan motor. Refer to
Engine Cooling Fan Replacement
in Engine Cooling.
Is the action complete?
| --
|
Go to Step 82
| --
|
65
|
- Remove the Mode Control Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
- Turn ON the ignition switch leaving the engine OFF.
- Connect a test light to ground.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the Mode Control Relay cavity 85 ( in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 67
|
Go to Step
66
|
66
|
- Check for an open in the Battery Rail Voltage circuit to Mode
Control Relay.
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Repairs.
Is the action complete?
| --
|
Go to Step 82
| --
|
67
|
- Remove the #2 Cooling Fan Relay.
- Connect a test light to ground.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the #2 Cooling Fan Relay cavity 30 ( in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 69
|
Go to Step
68
|
68
|
- Check for an open or poor electrical terminal connection at the
underhood Fuse Block Assembly in the Positive Voltage circuit to #2 Cooling
Fan Relay cavity 30.
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Repairs.
Is the action complete?
| --
|
Go to Step 82
| --
|
69
|
- Check the RH engine cooling fan motor circuit for an open or a
poor electrical terminal between the RH engine coolant fan motor electrical
connector terminal B and the Mode Control Relay cavity 87A.
- If a problem is found, repair the circuit as necessary. Refer
to
Wiring Repairs
in Wiring
Repairs.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
70
|
70
|
- Check for a poor terminal connection(s) in the underhood fuse
block for the Mode Control Relay .
- If a problem is found, repair the terminal connection(s) as necessary.
Refer to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
71
|
71
| Replace the Mode Control Relay.
Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
Is the action complete?
| --
|
Go to Step 82
| --
|
72
|
- Remove the #2 Fan Control Relay. Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
- Turn ON the ignition switch leaving the engine OFF.
- Connect a test light to ground.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the #2 Fan Control Relay cavity 86 ( in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 74
|
Go to Step
73
|
73
|
- Check for an open or poor electrical terminal connection in the
Battery Rail Voltage circuit to the #2 Fan Control Relay cavity 86.
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
74
|
- Connect a test light to B+.
Important: Use the J 35616
Connector
Test Adapter Kit test lead to probe into the underhood fuse block.
- Probe the #2 Fan Control Relay cavity 87 ( in the underhood fuse block)
with the test light.
Is the test light ON?
| --
|
Go to Step 76
|
Go to Step
75
|
75
|
- Check for an open or poor electrical terminal connection in the
circuit:
1.1. | Between the #2 Fan Control Relay cavity 87 and the Mode Control
Relay cavity 87A ( in the underhood fuse block) and ground |
1.2. | Bewteen the Mode Control Relay cavity 87 ( in the underhood fuse
block) to ground |
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
76
|
- Check for a poor electrical terminal connection in the #2 Fan
Control Relay in the underhood fuse block.
- If a problem is found, repair the terminal connection as necessary.
Refer to
Wiring Repairs
in Wiring
Systems.
Was a problem found?
| --
|
Go to Step 82
|
Go to Step
77
|
77
| Replace the #2 Fan Control Relay.
Refer to
Air Conditioning (A/C) Compressor and Cooling Fan Relays Replacement
.
Is the action complete?
| --
|
Go to Step 82
| --
|
78
|
- Turn OFF the ignition switch.
- Replace the PCM. Refer to
Powertrain Control Module Replacement
.
Is the action complete?
| --
|
Go to Step 82
| --
|
79
| Repair
the open in the Mode Control Relay cavity 85 and the #2 Fan Control Relay
cavity 86 control circuit to the PCM. Refer to
Wiring Repairs
in Wiring Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
80
| Replace
the LH engine cooling fan motor. Refer to
Engine Cooling Fan Replacement
in HVAC Systems.
Is the action complete?
| --
|
Go to Step 82
| --
|
81
| Replace
the RH engine cooling fan motor. Refer to
Engine Cooling Fan Replacement
. in HVAC Systems
Is the action complete?
| --
|
Go to Step 82
| --
|
82
|
- Reconnect all hardware that was previously disconnected ( if not
already reconnected).
- Command OFF the Low Speed Fans (if not already OFF).
- Check the engine coolant temperature is below the specified value.
- Turn OFF the A/C switch (if not already turned OFF).
- Start the engine.
Observe the engine cooling fans.
Are the engine cooling fans running?
| 100°C (212°F)
|
Go to Step 32
|
Go to Step 83
|
83
|
- Command ON the Low speed fans using the scan tool output tests
function.
- Observe the cooling fans.
Are both cooling fans running at low speed?
| --
|
Go to Step 84
|
Go to Step 8
|
84
|
- Command ON the High speed fans using the scan tool output tests
function.
- Wait 6 seconds.
- Observe the cooling fans.
Are both cooling fans running at high speed?
| --
| System OK
|
Go to Step 58
|